EP0884123B1 - Schäumbarer Metallkörper - Google Patents
Schäumbarer Metallkörper Download PDFInfo
- Publication number
- EP0884123B1 EP0884123B1 EP98109728A EP98109728A EP0884123B1 EP 0884123 B1 EP0884123 B1 EP 0884123B1 EP 98109728 A EP98109728 A EP 98109728A EP 98109728 A EP98109728 A EP 98109728A EP 0884123 B1 EP0884123 B1 EP 0884123B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- gas
- blowing agent
- metal powder
- compacted
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 59
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 239000004604 Blowing Agent Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000011265 semifinished product Substances 0.000 claims abstract description 21
- 229910012375 magnesium hydride Inorganic materials 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000005187 foaming Methods 0.000 claims abstract description 10
- -1 titanium hydride Chemical compound 0.000 claims abstract description 10
- 229910000048 titanium hydride Inorganic materials 0.000 claims abstract description 7
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 4
- 150000004677 hydrates Chemical class 0.000 claims abstract description 3
- 229910052987 metal hydride Inorganic materials 0.000 claims abstract description 3
- 150000004681 metal hydrides Chemical class 0.000 claims abstract description 3
- RSHAOIXHUHAZPM-UHFFFAOYSA-N magnesium hydride Chemical compound [MgH2] RSHAOIXHUHAZPM-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000009694 cold isostatic pressing Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- 230000008016 vaporization Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 6
- 239000006260 foam Substances 0.000 description 19
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 18
- 239000002245 particle Substances 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 4
- 239000002923 metal particle Substances 0.000 description 4
- 239000006262 metallic foam Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002731 mercury compounds Chemical class 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
Definitions
- the invention relates to a method for manufacturing foamable metal body, the compact semi-finished product available in this way, the use of the semi-finished product for foaming a closed cell Metal body and the closed-cell cells thus obtained foam-shaped metal body.
- EP-B-0 460 392 describes a process for the production foamable metal body with mostly closed porosity, the resulting pores evenly throughout the metal body distributed and should have a uniform size, in which a mixture of at least one metal powder and at least one gas-releasing blowing agent powder and compacted into a semi-finished product.
- the one described here The method is characterized in that the hot compaction at a temperature above the decomposition temperature of the blowing agent takes place, the connection of the Metal powder particles are predominantly made by diffusion and at a pressure high enough to disintegrate the Prevent blowing agent so that the metal particles themselves in a fixed connection with each other and one represent gas-tight seal for the gas particles of the blowing agent.
- DE-C-41 24 591 describes a process for the production foamable metal body by rolling a powder mixture, at which contains the powder mixture of at least one blowing agent Powder and a metal powder, in which the powder mixture is filled into a metal hollow profile and rolled.
- the Cold pressing bodies obtainable according to this publication cannot only be heated before the rolling process, but also after individual roll passes are reheated. Here too the Cold pressed body to a temperature above the decomposition temperature of the blowing agent heated.
- DE-A-44 26 627 relates to a metallic composite material and a process for its manufacture.
- the metallic Composite material with a core of one or more porous Metal materials and at least one top layer made of solid Material points between the core and the top layer / top layers metallic bonds.
- the object of the present invention is on the one hand improved process for the production of foamable metal bodies and secondly in an improvement in technical Properties of the semi-finished products as well as the closed-cell ones foam-shaped metal body compared to the prior art.
- the first-mentioned object of the present invention is achieved by a process for producing foamable metal bodies, in which a mixture of at least one metal powder and one gas-releasing blowing agent produced and a semi-finished product is compacted.
- the method is characterized in that a gas-releasing blowing agent containing magnesium hydride starts.
- the chemical compound "magnesium hydride” has long been State of the art. It was used as a foaming agent for rubber materials in the US-A-3 114 724. However, in the area of manufacturing foamable metal body previously other gas-releasing blowing agents, for example titanium hydride, carbonates, hydrates or easily evaporating substances used. Meanwhile, however Magnesium hydride is no longer just a laboratory product, but also commercially available on a larger scale. A core of the present The invention thus consists of magnesium hydride to supply new use for the production of foamable metal bodies. For example, metal powder is applied thorough mixing with a small amount of magnesium hydride containing blowing agent and compacted the thus obtained Mixture, so it is possible to manufacture compacts to obtain foam-shaped metal bodies. The so available Foam-shaped metal bodies have a very homogeneous pore density distribution down to the surface areas of the molded body on which is a significant advance over foam-like Represents metal bodies with known gas-releasing Blowing agents of the prior art can be obtained
- magnesium hydride especially autocatalytic Magnesium hydride produced, containing blowing agent metallic foam bodies have a different type Morphology as foams, for example with titanium hydride be obtained as a gas-releasing blowing agent.
- the aluminum foam piece is in use of magnesium hydride according to the present invention in the Fig. 1 foamed significantly more uniformly.
- the compression of the Bottom is only about 3 mm thick, while the aluminum foam according to the state of the art up to 1 cm non-foamed Material can be found at the bottom.
- Metal foam is also the number of cells per unit volume significantly larger, preferably with regard to for the presence of small cells. Also in this foam to detect a certain irregularity in the cells, which, however, is significantly less pronounced than with the foam according to the state of the art.
- the surface of the foam according to The present invention has more openings than that of the Foam according to the prior art. But the openings are much finer and more even.
- one Plastic foam can be used for the purposes of the present invention speak of small, uniform blow-offs.
- all fusible metals or metal alloys foamable in the sense of the present invention are as metal powder Aluminum and its alloys used. Accordingly it is particularly preferred that the metal powder is substantially made of aluminum, optionally with conventional alloy components, such as magnesium, copper and / or silicon.
- Metal powder is available to the person skilled in the art in a wide variety of processes to disposal.
- Particularly preferred in the sense of the present Invention is cold pressing, the cold isostatic Pressing, rolling, extrusion and extrusion.
- this is preferred Compacting below the decomposition temperature of the magnesium hydride containing gas-releasing blowing agent, preferably performed at room temperature. While in the prior art usually compacting at high temperature, especially above the decomposition temperature of the gas-releasing Blowing agent was carried out in the invention Use of gas-releasing blowing agents containing magnesium hydride found that compacting even at low Temperatures is possible.
- the mixture of metal powder and Magnesium hydride containing gas-releasing blowing agent When compacting, the mixture of metal powder and Magnesium hydride containing gas-releasing blowing agent the highest possible density can be compressed. Particularly preferred within the meaning of the present invention is the compacting in such a way that the density at least 90%, in particular at least 95% of the theoretical density of the Metal of the metal powder. This can be caused by high pressing forces can be achieved. So by applying 0.5% magnesium hydride as a blowing agent from spray-atomized spherical Aluminum (AlMgSi 6061) by cold isostatic pressing a cylinder with a pre-pressure of 450 bar accordingly a pressing force of about 10 t with a density of more than 90% of the theoretical density of aluminum can be produced.
- AlMgSi 6061 spray-atomized spherical Aluminum
- the amount of magnesium hydride to be used according to the invention containing gas-releasing blowing agent is usually very low.
- the proportions of blowing agent are of the order of magnitude usually from a few tenths of a percent by weight because that compacted semi-finished product is fully compressed and propellant cannot escape.
- Amounts of blowing agents have proven to be particularly favorable from 0.1 to 2% by weight, in particular 0.2 to 1 wt .-%, based on the metal powder, proven.
- magnesium hydride used itself, the commercially available is.
- known ones can also be used Metal hydrides, for example titanium hydride, carbonates, for example Calcium carbonate, potassium carbonate, sodium carbonate, Sodium bicarbonate, hydrates, for example aluminum sulfate hydrate, Alum, aluminum hydroxide or easily evaporating Substances, for example mercury compounds or powdered organic substances are used.
- Another embodiment of the present invention comprises the semi-finished products obtainable by compacting, in which the metal particles in a relatively firm connection with each other are and an essentially gastight seal form for the gas particles of the blowing agent.
- These semi-finished products can optionally by known methods to be formed in order to achieve the appropriate pressure and temperature conditions according to known methods to a closed cell Foam metal body. So can the foaming of the semi-finished product, if no final shape is specified is. Alternatively, the foaming can also be carried out in one partially or completely closed form, where the finished porous metal body the specified shape of the tool accepts.
- the conditions for foaming the semi-finished products are the expert from the state of the aforementioned in the introduction Technology known.
- Another embodiment of the present invention above also relates to those obtainable using the above method closed-cell foam-shaped metal body.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Laminated Bodies (AREA)
Description
Claims (11)
- Verfahren zur Herstellung schäumbarer Metallkörper, bei denen Gemische aus wenigstens einem Metallpulver und einem gasabspaltenden Treibmittel hergestellt und zu einem Halbzeug kompaktiert werden, dadurch gekennzeichnet, daß man ein Magnesiumhydrid enthaltendes gasabspaltendes Treibmittel einsetzt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Metallpulver im wesentlichen aus Aluminium, gegebenenfalls mit üblichen Legierungsbestandteilen besteht.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Kompaktieren Kaltpressen, kaltisostatisches Pressen, Walzen, Strangpressen und/oder Extrudieren umfaßt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß man das Kompaktieren unterhalb der Zersetzungstemperatur des gasabspaltenden Treibmittels, insbesondere bei Raumtemperatur durchführt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man Metallpulver und gasabspaltendes Treibmittel auf eine Dichte von wenigstens 90 %, insbesondere 95 % der theoretischen Dichte des Metalls des Metallpulvers kompaktiert.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das gasabspaltende Treibmittel in einer Menge von 0,1 bis 2 Gew.-%, insbesondere 0,2 bis 1 Gew.-%, bezogen auf das Metallpulver, einsetzt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man Magnesiumhydrid gegebenenfalls neben weiteren Metallhydriden, insbesondere Titanhydrid, Carbonaten, Hydraten und/oder leicht verdampfenden Stoffen als gasabspaltendes Treibmittel einsetzt.
- Kompaktiertes Halbzeug erhältlich nach einem Verfahren gemäß einem oder mehreren der Ansprüche 1 bis 7.
- Verwendung des Halbzeugs gemäß Anspruch 8 zum Schäumen eines geschlossenzelligen Metallkörpers durch Einwirkung von erhöhtem oder vermindertem Druck und/oder erhöhter Temperatur.
- Verwendung nach Anspruch 9 zum Ausschäumen von Hohlräumen in Formwerkzeugen.
- Geschlossenzellige schaumförmige Metallkörper, erhältlich nach den Ansprüchen 9 oder 10.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19724326 | 1997-06-10 | ||
DE19724326 | 1997-06-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0884123A2 EP0884123A2 (de) | 1998-12-16 |
EP0884123A3 EP0884123A3 (de) | 2001-04-04 |
EP0884123B1 true EP0884123B1 (de) | 2003-03-26 |
Family
ID=7831969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98109728A Expired - Lifetime EP0884123B1 (de) | 1997-06-10 | 1998-05-28 | Schäumbarer Metallkörper |
Country Status (6)
Country | Link |
---|---|
US (1) | US5972285A (de) |
EP (1) | EP0884123B1 (de) |
JP (1) | JPH1112605A (de) |
AT (1) | ATE235336T1 (de) |
DE (1) | DE59807606D1 (de) |
ES (1) | ES2193439T3 (de) |
Cited By (1)
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CN109550963A (zh) * | 2018-12-13 | 2019-04-02 | 华南理工大学 | 一种用于3d打印的亚微米氢化物颗粒增强铝基粉体的制备方法 |
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DE50004040D1 (de) * | 1999-02-24 | 2003-11-20 | Goldschmidt Ag Th | Aktiviertes Magnesiummetall |
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DE10024776C1 (de) | 2000-05-19 | 2001-09-06 | Goldschmidt Ag Th | Verwendung von Metallhydrid-behandeltem Zink in der metallorganischen Synthese |
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DE10045494C2 (de) * | 2000-09-13 | 2002-07-18 | Neue Materialien Fuerth Gmbh | Verfahren zum Herstellen eines Formkörpers aus Metallschaum |
US6733722B2 (en) * | 2000-09-13 | 2004-05-11 | Neue Materialien Furth Gmbh | Method for producing a moulded body from foamed metal |
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AT412876B (de) * | 2003-08-05 | 2005-08-25 | Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh | Schäumbares halbzeug und verfahren zur herstellung von metallteilen mit innerer porosität |
US7328831B1 (en) | 2004-06-25 | 2008-02-12 | Porvair Plc | Method of making a brazed metal article and the article formed thereby |
US7699092B2 (en) * | 2007-06-18 | 2010-04-20 | Husky Injection Molding Systems Ltd. | Metal-molding system and process for making foamed alloy |
US7931997B2 (en) * | 2008-03-12 | 2011-04-26 | Bloom Energy Corporation | Multi-material high temperature fuel cell seals |
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US8623569B2 (en) | 2008-12-09 | 2014-01-07 | Bloom Energy Corporation | Fuel cell seals |
US20110111250A1 (en) * | 2009-11-10 | 2011-05-12 | Ken Evans | Process for producing a foamed metal article |
CA2713560C (en) * | 2010-08-23 | 2019-10-29 | Jangofish Holdings Inc. | Process and method for producing foamable metals |
US8968509B2 (en) | 2013-05-09 | 2015-03-03 | Bloom Energy Corporation | Methods and devices for printing seals for fuel cell stacks |
DE102014209408A1 (de) | 2014-05-19 | 2015-11-19 | Evonik Degussa Gmbh | Ethoxylatherstellung unter Verwendung hoch aktiver Doppelmetallcyanid-Katalysatoren |
EP3168273B1 (de) | 2015-11-11 | 2018-05-23 | Evonik Degussa GmbH | Härtbare polymere |
EP3321304B1 (de) | 2016-11-15 | 2019-06-19 | Evonik Degussa GmbH | Mischungen zyklischer-verzweigter siloxane vom d/t-typ und deren folgeprodukte |
EP3415548B1 (de) | 2017-06-13 | 2020-03-25 | Evonik Operations GmbH | Verfahren zur herstellung sic-verknüpfter polyethersiloxane |
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EP3438158B1 (de) | 2017-08-01 | 2020-11-25 | Evonik Operations GmbH | Herstellung von sioc-verknüpften polyethersiloxanen |
EP3467006B1 (de) | 2017-10-09 | 2022-11-30 | Evonik Operations GmbH | Mischungen zyklischer-verzweigter siloxane vom d/t-typ und deren folgeprodukte |
EP3611214A1 (de) | 2018-08-15 | 2020-02-19 | Evonik Operations GmbH | Sioc-verknüpfte, lineare polydimethylsiloxan-polyoxyalkylen-blockcopolymere |
EP3611215A1 (de) | 2018-08-15 | 2020-02-19 | Evonik Operations GmbH | Verfahren zur herstellung acetoxygruppen-tragender siloxane |
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DE4101630A1 (de) * | 1990-06-08 | 1991-12-12 | Fraunhofer Ges Forschung | Verfahren zur herstellung aufschaeumbarer metallkoerper und verwendung derselben |
DE4124591C1 (en) * | 1991-01-21 | 1993-02-11 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | Foamable metal body prodn. with reduced density differences - by charging hollow section with mixt. of powder contg. expanding agent and metal powder, and precompacting |
DE4426627C2 (de) * | 1993-07-29 | 1997-09-25 | Fraunhofer Ges Forschung | Verfahren zur Herstellung eines metallischen Verbundwerkstoffes |
DE19501659C1 (de) * | 1995-01-20 | 1996-05-15 | Daimler Benz Ag | Verfahren zur Herstellung eines Metallschaumteils |
-
1998
- 1998-05-28 DE DE59807606T patent/DE59807606D1/de not_active Expired - Lifetime
- 1998-05-28 AT AT98109728T patent/ATE235336T1/de not_active IP Right Cessation
- 1998-05-28 EP EP98109728A patent/EP0884123B1/de not_active Expired - Lifetime
- 1998-05-28 ES ES98109728T patent/ES2193439T3/es not_active Expired - Lifetime
- 1998-06-09 US US09/094,270 patent/US5972285A/en not_active Expired - Fee Related
- 1998-06-10 JP JP10161916A patent/JPH1112605A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109550963A (zh) * | 2018-12-13 | 2019-04-02 | 华南理工大学 | 一种用于3d打印的亚微米氢化物颗粒增强铝基粉体的制备方法 |
Also Published As
Publication number | Publication date |
---|---|
ES2193439T3 (es) | 2003-11-01 |
EP0884123A3 (de) | 2001-04-04 |
DE59807606D1 (de) | 2003-04-30 |
EP0884123A2 (de) | 1998-12-16 |
JPH1112605A (ja) | 1999-01-19 |
US5972285A (en) | 1999-10-26 |
ATE235336T1 (de) | 2003-04-15 |
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