CN102347126A - High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof - Google Patents
High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof Download PDFInfo
- Publication number
- CN102347126A CN102347126A CN2010102409132A CN201010240913A CN102347126A CN 102347126 A CN102347126 A CN 102347126A CN 2010102409132 A CN2010102409132 A CN 2010102409132A CN 201010240913 A CN201010240913 A CN 201010240913A CN 102347126 A CN102347126 A CN 102347126A
- Authority
- CN
- China
- Prior art keywords
- metal
- agent
- iron
- rare earth
- earth permanent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 36
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 150000002910 rare earth metals Chemical class 0.000 title abstract description 18
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title abstract description 7
- 239000000463 material Substances 0.000 title abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 42
- 239000000956 alloy Substances 0.000 claims abstract description 42
- 239000013078 crystal Substances 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 11
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 49
- 230000008595 infiltration Effects 0.000 claims description 23
- 238000001764 infiltration Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 21
- 239000000696 magnetic material Substances 0.000 claims description 18
- -1 neodymium-iron-boron rare earth Chemical class 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims description 2
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims description 2
- 229910018185 Al—Co Inorganic materials 0.000 claims 1
- 229910020637 Co-Cu Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 3
- 229910052692 Dysprosium Inorganic materials 0.000 abstract description 2
- 229910052771 Terbium Inorganic materials 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 229910017052 cobalt Inorganic materials 0.000 abstract description 2
- 239000010941 cobalt Substances 0.000 abstract description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052777 Praseodymium Inorganic materials 0.000 abstract 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical group [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 abstract 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 abstract 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 27
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- JZQOJFLIJNRDHK-CMDGGOBGSA-N alpha-irone Chemical compound CC1CC=C(C)C(\C=C\C(C)=O)C1(C)C JZQOJFLIJNRDHK-CMDGGOBGSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002595 magnetic resonance imaging Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0572—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a high-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and a manufacturing method thereof. The manufacturing method comprises the following steps: firstly, casting R-iron-boron-aluminum (R-Fe-B-Al) into a rapidly solidified alloy plate (R represents one and/or several of rare-earth elements containing Nd) by adopting a vacuum rapid solidifying process, then, coating a metal penetrant comprising the component Ra-Al or Ra-Al-X [the Ra represents dysprosium (Dy) and/or terbium (Tb), and the X represents one or several of cobalt, copper, gallium and zirconium (Co, Cu, Ga and Zr) elements] to the surface of the alloy plate, and heating to enable the metal penetrant to penetrate into the crystal boundary of the rapidly solidified alloy plate. A replacement reaction happens between the Ra in the penetrant entering the crystal boundary of the rapidly solidified alloy plate and the Nd and/or praseodymium (Pr) in the main phase of the alloy plate to form an Rh2(Fe, Al)14B phase with high content of the Dy and/or the Tb (the Rh represents that the content of the Dy and/or the Tb is higher than that of the Dy and/or the Tb in the R), and the positions of part of Fe atoms are replaced by Al atoms to encircle the double-main phase structure of an R2Fe14B phase. The high-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material disclosed by the invention is capable of effectively improving a coercive force and obviously reducing the use level of rare earth, and simultaneously, is also capable of improving the corrosion resistance of a magnet.
Description
Technical field
The invention belongs to the permanent magnetic material field, particularly relate to a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material and manufacturing approach
Background technology
Nd-Fe-B rare earth permanent magnetic material since coming out, has obtained increasing application with its good magnetic property, is widely used in the Magnetic resonance imaging of medical treatment, computer hard disc driver, sound equipment, mobile phone etc.; Along with energy-conservation and requirement low-carbon economy, Nd-Fe-B rare earth permanent magnetic material begins the motor at car electrics, household electrical appliance, energy-saving electric machine, hybrid vehicle again, and use in fields such as wind power generating motor.
Nineteen eighty-two, SUMITOMO CHEMICAL particulate metal company at first disclosed the Japan Patent 1,622,492 of neodymium iron boron, and this patent has disclosed the new neodymium iron boron compound that exists to have high magnetic property first.Its composition is R-Fe-B-M, and R comprises in the rare earth of Nd one or more here, and Fe is transiting group metal elements Fe, and B represents nonmetalloid B, and M is one or more of any element that can find on the periodic table of elements.Production technology adopts powder metallurgical technique, at first adopts vacuum melting furnace, and founding becomes alloy pig under vacuum or protection gas; Process the third generation rare earth permanent-magnetic material that is called as Nd-Fe-B rare-earth permanent magnet through operations such as powder process, pressing under magnetic field, sintering then.Compare with second generation rare earth permanent-magnetic material SmCo, replace cobalt with iron, low price many, and magnetic energy product is several times of second generation rare earth permanent magnet.People carry out extensive studies to this material thereupon and begin application.Soon, the structure of this compound just is identified, and promptly principal phase is R
2Fe
14The B phase, crystal boundary is by rich R phase and B phase composition.People such as Hadijtanayis studies and confirms that principal phase is cubic phase crystal structure subsequently, and measures Nd
2Fe
14B phase lattice constant is a=0.8792, c=1.2177; Dy
2Fe
14The lattice constant of B phase is a=0.8757, c=1.1990.
June nineteen ninety-five SUMITOMO CHEMICAL particulate metal company again to U. S. application the patent that the principal phase of quite being disputed on is made up of Fe-Co-B-R with cubic phase crystal structure, promptly principal phase contains the Co patent.For distinguishing previous patent, this patent proposes clearly not comprise that Co is zero.This patent has disclosed principal phase and has had cubic phase crystal structure, its lattice constant a
0About 0.88nm, c
0About 1.2nm.And in principal phase, replace part Fe with Co, Curie temperature is higher than Fe-B-R or the Fe-B-R-M that principal phase does not contain Co.
Nineteen ninety-five, Japanese three moral metal company have replaced the vacuum ingot casting process that always uses with vacuum rapid hardening technology.Day disclosure special permission: the spy opens flat 9-155507 and has disclosed this technological principle and key technology.Raw material is smelted into alloy under vacuum state and inert gas shielding, molten alloy to water cooled rolls, under the quick cooling of water cooled rolls, becomes alloy sheet with the alloy rapid hardening of fusion through trough casting; Since rapid hardening casting blade technolgy have the size that can control crystal grain, size evenly, advantage such as no α-iron, began from 1997, this technology is used fast, Chinese patent: ZL97217372.2, ZL01141410.3 is disclosed also is this technology.
As everyone knows, neodymium iron boron is mainly by principal phase R
2Fe
14B and crystal boundary (rich neodymium mutually and boron-rich phase) are mutually formed.Principal phase R
2Fe
14B shared ratio in material is big more, and magnetic property is just high more; In view of the above, the content of rare earth will be as far as possible near the content of principal phase.When rare earth reduces, form α-iron again easily, do not reach the principal phase requirement of design.Crystal boundary can not form liquid-phase sintering mutually very little again.Nineteen ninety; People such as Otsuki E have proposed two alloyages at the international rare earth permanent magnet that a Regensburg is held with using in the meeting; Promptly, be called as first alloy, crystal boundary composition melting second alloy of forming by rich neodymium phase and boron-rich phase mutually by principal phase direct ratio composition molten alloy; Two kinds of alloys can mix after the melting respectively with the melting of vacuum rapid hardening technology by a certain percentage, and follow-up technology is identical with other technology.In order to improve the coercive force of magnet, it is main with Dy, Tb mainly in the rare earth R of second alloy that the people is arranged.
Chinese patent ZL200610089124.7 discloses human nanometer Dy, the Tb powder such as Yue Ming of Beijing University of Technology and has done second phase, with first technology of mixing manufacture high-coercive force neodymium iron boron mutually.Under the same conditions, saved the consumption of heavy rare earth.
The inventor explores through research, has obtained a kind of high performance sintered neodymium-iron-boron Rare earth permanent-magnet material and its preparation method of corrosion-resistant, low heavy rare earth consumption.
Compared with prior art, one of advantage of the present invention is the adding of Dy and/or Tb, is to infiltrate agent through metal to infiltrate along crystal boundary; And replace with Pr and/or Nd; Be enclosed in principal phase around, improving the coercitive while, less to the reduction of magnetic energy product; Significantly reduce the consumption of heavy rare earth, protected tellurian scarce resource.
Compared with prior art, another advantage of the present invention is the adding of Al, Co, Cu, Ga, Zr, is to infiltrate agent through metal to infiltrate along crystal boundary, and is retained in the crystal boundary, has reduced the probability that gets into principal phase.Promptly improve magnetic property, improved the corrosion resistance of crystal boundary again, thereby also improved the corrosion resistance of magnet.
Summary of the invention
A kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material and manufacturing approach, its master alloying is made up of the R-Fe-B-Al alloy that adds small amount of metallic elements Al, and R representative here comprises a kind of and/or multiple in the rare earth element of Nd.At first adopting vacuum rapid hardening technology, described R-Fe-B-Al founding is become the rapid hardening alloy sheet, is that (Ra represents Dy and/or Tb here for Ra-Al or Ra-Al-X with composition then; X represents one or more in Co, Cu, Ga, the Zr element) metal infiltrate the surface that agent is coated to alloy sheet, heating penetrates in the crystal boundary of described rapid hardening alloy sheet then; Displacement reaction takes place in Ra and the Nd in the alloy sheet principal phase and/or the Pr that penetrate in the infiltration agent in the crystal boundary of rapid hardening alloy sheet, forms the Rh of high Dy and/or Tb content
2(Fe, Al)
14(Rh representes that the content of Dy and/or Tb is higher than Dy and/or the content of Tb among the R to the B phase here; The position of part Fe atom is replaced by the Al atom) encirclement R
2Fe
14Two principal phase structures of B phase.What the Fe in the crystal boundary, B had also forms new Rh with Dy and/or Tb
2(Fe, Al)
14The B phase.
Infiltrate in the agent at Ra-Al or Ra-Al-X metal, the adding of Al has reduced the fusing point of Ra-Al-X metal infiltration agent, has increased flowability and wettability, helps the infiltration that the Ra-Al-X metal infiltrates agent, and therefore, Al is essential element.
When Ra-Al-X metal infiltration agent contained Elements C o, Co replacement of fe in crystal boundary, Fe combined to form new principal phase Rh with Ra, B
2(Fe, Al)
14The B phase thus, has promptly increased the content of principal phase, again because in crystal boundary, Co is more corrosion-resistant than Fe, has improved the decay resistance of magnet.When the content of Co in magnet during greater than 3%wt, Co can get into principal phase, and at this moment the remanent magnetism of magnet and coercive force can reduce, but can improve the Curie temperature of magnet.
When the Ra-Al-X metal infiltrates agent when containing element Cu, Cu is present in the crystal boundary, helps improving the coercive force of magnet, especially with the interpolation of uniting of Co, obviously improves coercive force.The content of Cu in magnet is less than 0.3%wt.Too much Cu can get into principal phase, obviously reduces the coercive force and the remanent magnetism of magnet.
When containing Ga in the Ra-Al-X metal infiltration agent, Ga is present in the crystal boundary, improves the lubrification of crystal boundary, restrains growing up of crystal grain, and is beneficial to improving coercive force and thermal stability.
When containing Zr in the Ra-Al-X metal infiltration agent, Zr also is present in the crystal boundary, and growing up unusually of restriction crystal grain is beneficial to stablizing follow-up sintering process.
When in the Ra-Al-X metal infiltrates agent, containing among Co, Cu, Ga, the Zr two or more, performance is superior to independent adding, and especially four kinds add best performance simultaneously.The associating adding promptly helps infiltration, optimization crystal boundary that metal infiltrates agent, also helps new Rh
2(Fe, Al)
14B forms mutually, and restriction crystal grain is grown up unusually.
Find infiltration capacity 1%-10%wt that Ra-Al or Ra-Al-X metal infiltrate agent after deliberation for best,, can't bring into play the effect that metal infiltrates agent when infiltration capacity during less than 1%wt; , metal infiltrates difficulty when infiltrating agent greater than 10%wt, overlong time, and practical value is little.
Find Rh through detecting
2(Fe, Al)
14B also has tetragonal structure, wherein a mutually
0Be about 0.87nm; c
0Be about 1.19nm, compare R
2Fe
14The a of B phase
0Little.R
2Fe
14B phase crystallite dimension is at 5-50 μ m; Rh
2(Fe, Al)
14B is enclosed in R
2Fe
14The skin of B, thickness is less than 30 μ m.
Further discover, before metallic cementation or in the metallic cementation process, feed hydrogen, help the infiltration that metal infiltrates agent.Therefore, before metallic cementation or in the metallic cementation process, can feed hydrogen.
Behind the metallic cementation, adopt conventional production method, accomplish operations such as airflow milling powder process, pressing under magnetic field, sintering timeliness.In process of production, oxygen content, powder process granularity and sintering temperature are bigger to the influence of production high-performance magnet.
The magnet that adopts said method to produce, have with metallic cementation after the similar structure of rapid hardening alloy sheet.Remain Rh
2(Fe, Al)
14B is enclosed in R
2Fe
14The skin of B, just Rh
2(Fe, Al)
14The B embracing layer has the trend of thickening.
Ra-Al or Ra-Al-X metal are infiltrated the method that agent is coated to the alloy sheet surface physical vaporous deposition, chemical vapour deposition technique are arranged.Also having a kind of method is earlier Ra-Al or Ra-Al-X to be smelted into alloy, processes particle mean size then less than 3 μ m powder, again with the surface of powder coating to the rapid hardening alloy sheet.In coating process, can add solvent.
Embodiment
Contrast below by embodiment further specifies remarkable result of the present invention.
Metal infiltrates the agent manufacture method and is in the following example: earlier Ra-Al or Ra-Al-X raw metal are melted under vacuum condition, charge into then argon gas vacuum degree is reduced to-below the 0.2MPa.Be incubated to be cast in the water-cooled film tool after 40 minutes and cool off, take out after 1 hour, then alloy is processed the alloy powder that particle mean size is 2.2 μ m.Content in the according to the form below is coated to the surface of alloy sheet.The composition of alloy sheet and metal infiltrate the composition of agent and also list in the following form.
The production technology of magnet is following in the following example: the temperature of metallic cementation is 900 ℃; Be incubated 8 hours, cool off with stove then; The particle mean size of airflow milling powder process is 3.5 μ m; The field intensity of pressing under magnetic field is 1.9T, and pressure is 22MPa; Sintering temperature is 1080 ℃, is incubated 3 hours.Specimen size is 30 * 30 * 20mm, and 20 is the magnetic field orientating direction.
Embodiment 1
The Ra-Al metal infiltrates agent, when promptly not containing Co, Cu, Ga, Zr.Compare with prior art (Comparative Examples), along with the increase of metal infiltration agent, the magnetic property of magnet increases, and especially coercive force increases significantly; Infiltrate in the agent at metal, when replacing Dy with Tb, the coercive force increase is more obvious.Table 1 provides is that metal infiltrates agent composition, metal and infiltrates the content of agent in the alloy sheet of correspondence and the composition of corresponding alloy sheet.Table 2 is magnetic property and decay resistances of correspondence table 1 numbering.Wherein B00 is numbered the Comparative Examples of prior art.
Table 1:
Annotate: wt% representes percentage by weight
Table 2
Embodiment 2
The Ra-Al-X metal infiltrates when X is Co in the agent, and along with the increase of metal infiltration agent, the magnetic property of magnet improves thereupon, but weightless obviously minimizing.Metal infiltrates composition, the infiltration capacity parameter of metal infiltration agent in alloy sheet of agent and alloy sheet and lists table 3 in; Corresponding performance is listed table 4 in.
Table 3:
Annotate: wt% representes percentage by weight
Table 4
Embodiment 3
The Ra-Al-X metal infiltrates when X is Co, Cu in the agent, can be found out by table 5 and table 6, and along with the increase of metal infiltration agent, the magnetic property of magnet improves, but weightless obvious the minimizing.
Table 5:
Annotate: wt% representes percentage by weight
Table 6
Embodiment 4
The Ra-Al-X metal infiltrates when X is Co, Cu, Ga in the agent, can be found out by table 7 and table 8, and along with the increase of metal infiltration agent, the magnetic property of magnet improves, but weightless obvious the minimizing.
Table 7:
Annotate: wt% representes percentage by weight
Table 8
Embodiment 5
The Ra-Al-X metal infiltrates when X is Co, Cu, Ga, Zr in the agent, can be found out by table 9 and table 10, and along with the increase of metal infiltration agent, the magnetic property of magnet improves, but weightless obvious the minimizing.
Table 9:
Annotate: wt% representes percentage by weight
Table 10
Claims (10)
1. high performance sintered neodymium-iron-boron rare earth permanent-magnetic material and manufacturing approach, its master alloying is made up of the R-Fe-B-Al that adds small amount of metallic elements Al (R representative here comprise in the rare earth element of Nd a kind of and/or multiple) alloy.It is characterized in that, at first adopt vacuum rapid hardening technology, the R-Fe-B-Al founding is become the rapid hardening alloy sheet; Be that (Ra represents Dy and/or Tb here for Ra-Al or Ra-Al-X with composition then; X represents one or more in Co, Cu, Ga, the Zr element) metal infiltrate agent and penetrate in the crystal boundary of rapid hardening alloy sheet; Displacement reaction takes place in Ra and the Nd in the alloy sheet principal phase and/or the Pr that penetrate in the infiltration agent in the crystal boundary of rapid hardening alloy sheet, forms the Rh of high Dy and/or Tb content
2(Fe, Al)
14(Rh representes that the content of Dy and/or Tb is higher than Dy and/or the content of Tb among the R to the B phase here; The position of part Fe atom is replaced by the Al atom) encirclement R
2Fe
14Two principal phase structures of B phase; Then, produce performance Nd Fe B sintered magnet through operations such as airflow milling powder process, pressing under magnetic field, sintering and timeliness; The magnet that adopts said method to produce, have with metallic cementation after the identical structure of rapid hardening alloy sheet, remain Rh
2(Fe, Al)
14B is enclosed in R
2Fe
14The skin of B, just Rh
2Fe
14B has the possibility of thickening.
2. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: Rh in the alloy sheet behind the metallic cementation
2(Fe, Al)
14B has tetragonal structure mutually, wherein lattice constant a
0Be about 0.87nm; c
0Be about 1.19nm, compare R
2Fe
14The lattice constant a of B phase
0Little; R
2Fe
14B phase crystallite dimension is at 5-50 μ m; Rh
2(Fe, Al)
14B is enclosed in R
2Fe
14The skin of B, thickness is less than 30nm.
3. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition is that the metal of Ra-Al-X infiltrates that X represent Co in the agent, i.e. metal infiltration agent is made up of Ra-Al-Co.
4. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition is that the metal of Ra-Al-X infiltrates that X represent Co and Cu in the agent, i.e. metal infiltration agent is made up of Ra-Al-Co-Cu.
5. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition is that the metal of Ra-Al-X infiltrates that X represent Co, Cu, Ga in the agent, i.e. metal infiltration agent is made up of Ra-Al-Co-Cu-Ga.
6. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach; It is characterized in that: composition is that the metal of Ra-Al-X infiltrates that X represent Co, Cu, Ga, Zr in the agent, i.e. metal infiltration agent is made up of Ra-Al-Co-Cu-Ga-Zr.
7. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition be the metal of Ra-Al-X infiltrate Ra in the agent composition except that Dy and/or Tb, also contain other rare earth element.
8. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition be the metal of Ra-Al-X infiltrate agent infiltration capacity less than 10% of alloy sheet weight.
9. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach is characterized in that: composition is that the metal of Ra-Al or Ra-Al-X infiltrates agent and carries out before the metallic cementation to alloy sheet or feed hydrogen in the metallic cementation process.
10. a kind of high performance sintered neodymium-iron-boron rare earth permanent-magnetic material according to claim 1 and manufacturing approach; It is characterized in that: composition is that the metal of Ra-Al or Ra-Al-X infiltrates agent when alloy sheet is carried out metallic cementation and oozes after-baking, and the metallic cementation temperature range is 500-1100 ℃.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240913.2A CN102347126B (en) | 2010-07-30 | 2010-07-30 | High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof |
| PCT/CN2011/074855 WO2012013086A1 (en) | 2010-07-30 | 2011-05-30 | High performance sintered ndfeb magnet and manufacturing method of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240913.2A CN102347126B (en) | 2010-07-30 | 2010-07-30 | High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102347126A true CN102347126A (en) | 2012-02-08 |
| CN102347126B CN102347126B (en) | 2014-07-23 |
Family
ID=45529398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010240913.2A Active CN102347126B (en) | 2010-07-30 | 2010-07-30 | High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102347126B (en) |
| WO (1) | WO2012013086A1 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000324A (en) * | 2012-10-17 | 2013-03-27 | 烟台正海磁性材料股份有限公司 | Sintered rare earth permanent magnetic material and preparation method thereof |
| CN103065787A (en) * | 2012-12-26 | 2013-04-24 | 宁波韵升股份有限公司 | Method for preparing sintered neodymium-iron-boron magnet |
| CN103495733A (en) * | 2013-10-18 | 2014-01-08 | 北京科技大学 | Method for preparing sintered Nd-Fe-B permanent magnet material with intergranular Nd-rich phase replaced |
| CN103757587A (en) * | 2014-01-13 | 2014-04-30 | 赣南师范学院 | Method for penetrating metal penetrant into sintered NdFeB permanent-magnet material |
| CN103903825A (en) * | 2012-12-28 | 2014-07-02 | 比亚迪股份有限公司 | Preparation method of neodymium iron boron permanent magnet material |
| CN105170976A (en) * | 2015-10-23 | 2015-12-23 | 北京科技大学 | Method for preparing high-coercivity neodymium iron boron by means of low-temperature sintering after blank compacting permeation |
| CN106783128A (en) * | 2016-12-21 | 2017-05-31 | 包头稀土研究院 | The method for preparing low heavy rare earth high-coercive force neodymium iron boron magnetic body |
| CN106847455A (en) * | 2016-12-21 | 2017-06-13 | 包头稀土研究院 | Neodymium iron boron preparation of sections method |
| EP3182423A1 (en) * | 2015-12-18 | 2017-06-21 | JL Mag Rare-Earth Co., Ltd. | Neodymium iron boron magnet and preparation method thereof |
| WO2017101577A1 (en) * | 2015-12-16 | 2017-06-22 | 浙江东阳东磁稀土有限公司 | Corrosion-resistant sintered neodymium-iron-boron magnet rich in lanthanum and cerium, and manufacturing method |
| CN107093516A (en) * | 2017-04-14 | 2017-08-25 | 华南理工大学 | A kind of grain boundary decision method for improving neodymium iron boron magnetic body coercivity and heat endurance |
| EP3425643A1 (en) * | 2017-06-27 | 2019-01-09 | Daido Steel Co.,Ltd. | Rfeb-based magnet and method for producing rfeb-based magnet |
| CN109695015A (en) * | 2019-01-16 | 2019-04-30 | 东北大学 | Masking liquid and its preparation method and application is seeped in Fe-B rare-earth permanent magnet heavy rare earth thermal expansion |
| CN111312509A (en) * | 2020-04-24 | 2020-06-19 | 有研稀土(荣成)有限公司 | Process method for carrying out dysprosium and terbium permeation on high-end neodymium iron boron product |
| CN111415814A (en) * | 2020-04-24 | 2020-07-14 | 有研稀土(荣成)有限公司 | Method for preparing neodymium iron boron product by balloon packaging |
| CN111952031A (en) * | 2020-07-27 | 2020-11-17 | 钢铁研究总院 | Low-cost heat-resistant sintered Ce-containing magnet with Al-containing magnetic hardened layer structure and preparation method thereof |
| US11305345B2 (en) * | 2016-12-21 | 2022-04-19 | Baotou Research Institute of Rare Earths | Method for preparing neodymium-iron-boron permanent magnetic material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015122422A1 (en) * | 2014-02-14 | 2015-08-20 | 株式会社三徳 | Cast rare earth-containing alloy sheet, manufacturing method therefor, and sintered magnet |
| JP7251053B2 (en) * | 2017-06-27 | 2023-04-04 | 大同特殊鋼株式会社 | RFeB magnet and method for manufacturing RFeB magnet |
| CN114914046A (en) * | 2022-04-25 | 2022-08-16 | 浙江凯文磁业有限公司 | Medium-high performance neodymium iron boron magnet and preparation method thereof |
| CN117438207B (en) * | 2023-12-20 | 2024-04-12 | 江西金力永磁科技股份有限公司 | Method for improving binding force of surface coating of high-grade sintered NdFeB magnet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521068A (en) * | 2007-03-16 | 2009-09-02 | 信越化学工业株式会社 | Rare earth permanent magnet and method of manufacturing the same |
| CN101615459A (en) * | 2009-04-28 | 2009-12-30 | 中国科学院宁波材料技术与工程研究所 | Method for Improving the Performance of Sintered NdFeB Permanent Magnets |
| CN101714443A (en) * | 2008-09-29 | 2010-05-26 | 株式会社日立制作所 | Sintered magnet and rotating machine equipped with the same |
-
2010
- 2010-07-30 CN CN201010240913.2A patent/CN102347126B/en active Active
-
2011
- 2011-05-30 WO PCT/CN2011/074855 patent/WO2012013086A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521068A (en) * | 2007-03-16 | 2009-09-02 | 信越化学工业株式会社 | Rare earth permanent magnet and method of manufacturing the same |
| CN101714443A (en) * | 2008-09-29 | 2010-05-26 | 株式会社日立制作所 | Sintered magnet and rotating machine equipped with the same |
| CN101615459A (en) * | 2009-04-28 | 2009-12-30 | 中国科学院宁波材料技术与工程研究所 | Method for Improving the Performance of Sintered NdFeB Permanent Magnets |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000324A (en) * | 2012-10-17 | 2013-03-27 | 烟台正海磁性材料股份有限公司 | Sintered rare earth permanent magnetic material and preparation method thereof |
| CN103000324B (en) * | 2012-10-17 | 2016-08-03 | 烟台正海磁性材料股份有限公司 | A kind of sintered rare-earth permanent magnetic material and preparation method thereof |
| CN103065787A (en) * | 2012-12-26 | 2013-04-24 | 宁波韵升股份有限公司 | Method for preparing sintered neodymium-iron-boron magnet |
| CN103065787B (en) * | 2012-12-26 | 2015-10-28 | 宁波韵升股份有限公司 | A kind of method preparing Sintered NdFeB magnet |
| CN103903825A (en) * | 2012-12-28 | 2014-07-02 | 比亚迪股份有限公司 | Preparation method of neodymium iron boron permanent magnet material |
| CN103495733A (en) * | 2013-10-18 | 2014-01-08 | 北京科技大学 | Method for preparing sintered Nd-Fe-B permanent magnet material with intergranular Nd-rich phase replaced |
| CN103495733B (en) * | 2013-10-18 | 2015-09-23 | 北京科技大学 | The preparation method of the sintered Nd-Fe-B permanent magnetic material that the rich neodymium of a kind of crystal boundary is replaced mutually |
| CN103757587A (en) * | 2014-01-13 | 2014-04-30 | 赣南师范学院 | Method for penetrating metal penetrant into sintered NdFeB permanent-magnet material |
| CN103757587B (en) * | 2014-01-13 | 2017-03-22 | 赣南师范学院 | Method for penetrating metal penetrant into sintered NdFeB permanent-magnet material |
| CN105170976A (en) * | 2015-10-23 | 2015-12-23 | 北京科技大学 | Method for preparing high-coercivity neodymium iron boron by means of low-temperature sintering after blank compacting permeation |
| WO2017101577A1 (en) * | 2015-12-16 | 2017-06-22 | 浙江东阳东磁稀土有限公司 | Corrosion-resistant sintered neodymium-iron-boron magnet rich in lanthanum and cerium, and manufacturing method |
| EP3182423A1 (en) * | 2015-12-18 | 2017-06-21 | JL Mag Rare-Earth Co., Ltd. | Neodymium iron boron magnet and preparation method thereof |
| US9947447B2 (en) | 2015-12-18 | 2018-04-17 | Jl Mag Rare-Earth Co., Ltd. | Neodymium iron boron magnet and preparation method thereof |
| CN106783128B (en) * | 2016-12-21 | 2019-06-21 | 包头稀土研究院 | Method for preparing low heavy rare earth high coercivity neodymium iron boron magnet |
| CN106783128A (en) * | 2016-12-21 | 2017-05-31 | 包头稀土研究院 | The method for preparing low heavy rare earth high-coercive force neodymium iron boron magnetic body |
| CN106847455A (en) * | 2016-12-21 | 2017-06-13 | 包头稀土研究院 | Neodymium iron boron preparation of sections method |
| US11305345B2 (en) * | 2016-12-21 | 2022-04-19 | Baotou Research Institute of Rare Earths | Method for preparing neodymium-iron-boron permanent magnetic material |
| CN107093516A (en) * | 2017-04-14 | 2017-08-25 | 华南理工大学 | A kind of grain boundary decision method for improving neodymium iron boron magnetic body coercivity and heat endurance |
| EP3425643A1 (en) * | 2017-06-27 | 2019-01-09 | Daido Steel Co.,Ltd. | Rfeb-based magnet and method for producing rfeb-based magnet |
| US11328845B2 (en) | 2017-06-27 | 2022-05-10 | Daido Steel Co., Ltd. | RFeB-based magnet and method for producing RFeB-based magnet |
| CN109695015A (en) * | 2019-01-16 | 2019-04-30 | 东北大学 | Masking liquid and its preparation method and application is seeped in Fe-B rare-earth permanent magnet heavy rare earth thermal expansion |
| CN111312509A (en) * | 2020-04-24 | 2020-06-19 | 有研稀土(荣成)有限公司 | Process method for carrying out dysprosium and terbium permeation on high-end neodymium iron boron product |
| CN111415814A (en) * | 2020-04-24 | 2020-07-14 | 有研稀土(荣成)有限公司 | Method for preparing neodymium iron boron product by balloon packaging |
| CN111952031A (en) * | 2020-07-27 | 2020-11-17 | 钢铁研究总院 | Low-cost heat-resistant sintered Ce-containing magnet with Al-containing magnetic hardened layer structure and preparation method thereof |
| CN111952031B (en) * | 2020-07-27 | 2022-02-25 | 钢铁研究总院 | Low-cost heat-resistant sintered Ce-containing magnet with Al-containing magnetic hardened layer structure and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012013086A1 (en) | 2012-02-02 |
| CN102347126B (en) | 2014-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102347126B (en) | High-performance sintered neodymium-iron-boron (Nd-Fe-B) rare-earth permanent magnet material and manufacturing method thereof | |
| JP7220300B2 (en) | Rare earth permanent magnet material, raw material composition, manufacturing method, application, motor | |
| CN103295713B (en) | R-Fe-B rare-earth sintered magnet | |
| CN104051101B (en) | A kind of rare-earth permanent magnet and preparation method thereof | |
| CN102103917B (en) | Neodymium iron boron magnet, preparation method and device applying same | |
| WO2019169875A1 (en) | High-coercivity neodymium iron boron magnet and preparation method therefor | |
| KR102273462B1 (en) | Method for producing rare earth permanent magnet | |
| CN104752049A (en) | Process For Preparing Rare Earth Magnets | |
| CN104064346A (en) | NdFeB magnet and preparation method thereof | |
| CN103903823A (en) | Rare earth permanent magnetic material and preparation method thereof | |
| KR101966785B1 (en) | A Fabricating method of magnet of Nd-Fe-B system | |
| CN101562067A (en) | Manufacture method of corrosion-resistant R-Fe-B rare-earth permanent magnet | |
| CN103280290A (en) | Cerium-containing low-melting-point rare-earth permanent magnet liquid phase alloy and production method of permanent magnet comprising same | |
| CN101901658B (en) | Sintered NdFeB rare-earth permanent magnet material with modified grain boundary phase and preparation method thereof | |
| CN107275027B (en) | Cerium-rich rare earth permanent magnet using yttrium and preparation method thereof | |
| CN103757586A (en) | Method of infiltrating metal infiltrating agent to cerium-containing neodymium iron boron magnetic material | |
| CN107026003A (en) | A kind of preparation method of Sintered NdFeB magnet | |
| JP2020522143A (en) | Yttrium-added rare earth permanent magnet material and its manufacturing method | |
| JP5643355B2 (en) | Manufacturing method of NdFeB sintered magnet | |
| JP2024524892A (en) | Low-cost, high-coercivity LaCe-rich neodymium iron boron permanent magnet and its manufacturing method and applications | |
| CN102436893B (en) | A kind of high-coercivity magnet without the few Dy of Tb and preparation method | |
| CN113838622A (en) | High-coercivity sintered neodymium-iron-boron magnet and preparation method thereof | |
| CN103757587B (en) | Method for penetrating metal penetrant into sintered NdFeB permanent-magnet material | |
| CN107077940A (en) | Sintered magnet based on R-FE-B without heavy rare earth element and preparation method thereof | |
| WO2012029527A1 (en) | Alloy material for r-t-b-based rare earth permanent magnet, production method for r-t-b-based rare earth permanent magnet, and motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |