GB990818A - Improvements in or relating to boron nitride - Google Patents
Improvements in or relating to boron nitrideInfo
- Publication number
- GB990818A GB990818A GB2972261A GB2972261A GB990818A GB 990818 A GB990818 A GB 990818A GB 2972261 A GB2972261 A GB 2972261A GB 2972261 A GB2972261 A GB 2972261A GB 990818 A GB990818 A GB 990818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boron nitride
- pair
- electrically
- die
- metals
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
- B01J3/065—Presses for the formation of diamonds or boronitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/008—Abrasive bodies without external bonding agent
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/583—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride
- C04B35/5831—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride based on cubic boron nitrides or Wurtzitic boron nitrides, including crystal structure transformation of powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Ceramic Products (AREA)
Abstract
<PICT:0990818/C1/1> A coherent compact of joined crystals of the cubic form of boron nitride is prepared by subjecting crystals of cubic boron nitride to a pressure of at least 75,000 atmospheres at a temperature of 1200-2400 DEG C. in a high temperature high pressure apparatus for at least 2 minutes. The apparatus (see Fig. 1) has a pair of punches 11 and 111 and a die 12 which has an aperture 13 to receive a reaction vessel 14 having a hollow electrically non-conductive cylinder 15 and concentrically positioned therein is an electrically conductive tube 16 containing specimen material 17. The ends are closed by a pair of electrically conductive discs 18 and end caps 19, each of which has a metal ring 20 encircling a non-conductive stone disc 21. A pair of electrically and thermally insulating gaskets 23 and 24 and a metallic gasket 25 are situated between 11 and 111 and die 12. The boron nitride is preferably finer than 20 mesh and may include magnesium, or at least one of the alkali metals, alkaline earth metals, lead or antimony or tin, or nitrides of these metals as catalysts. Minor quantities of: Al2O3, W, Zr, Re, Cr, Mn, Co, Mo, Ti, Ni, Cu and Be may be added as bonding agents. The compact may be mounted in a tool for cutting or grinding. Specifications 830,210, 830,743 and 860,499 are referred to.ALSO:<PICT:0990818/C6-C7/1> A coherent compact of joined crystals of the cubic form of boron nitride is prepared by subjecting crystals of cubic boron nitride to a pressure of at least 75,000 atmospheres at a temperature of 1200-2500 DEG C. in a high temperature high pressure apparatus for at least 2 minutes. The apparatus (see Fig. 1) has a pair of punches 11 and 111 and a die 12 which has an aperture 13 to receive a reaction vessel 14 having a hollow electrically nonconductive cylinder 15 and concentrically positioned therein is an electrically conductive tube 16 containing specimen material 17. The ends are closed by a pair of electrically conductive discs 18 and end caps 19 each of which has a metal ring 20 encircling a nonconductive stone disc 21. A pair of electrically and thermally insulating gaskets 23 and 24 and a metallic gasket 25 are situated between 11 and 111 and die 12. The boron nitride is preferably finer than 20 mesh and may include magnesium, or at least one of the alkali metals, alkaline earth metals, lead or antimony or tin, or nitrides of these metals as catalysts. Minor quantities of: Al2O3, W, Zr, Re, Cr, Mn, Co, Mo, Ti, Ni, Cu and Be may be added as bonding agents. The compact may be mounted in a tool for cutting or grinding. Specifications 830,210, 830,743 and 860,499 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6001160A | 1960-10-03 | 1960-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB990818A true GB990818A (en) | 1965-05-05 |
Family
ID=22026765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2972261A Expired GB990818A (en) | 1960-10-03 | 1961-08-17 | Improvements in or relating to boron nitride |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE607842A (en) |
| CH (1) | CH450374A (en) |
| GB (1) | GB990818A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2591618A (en) * | 2020-01-31 | 2021-08-04 | Element Six Uk Ltd | Polycrystalline cubic boron nitride material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA831881B (en) * | 1982-04-02 | 1984-06-27 | Gen Electric | Sweep through process for making polycrystalline compacts |
-
1961
- 1961-08-17 GB GB2972261A patent/GB990818A/en not_active Expired
- 1961-09-05 BE BE607842A patent/BE607842A/en unknown
- 1961-10-02 CH CH1141961A patent/CH450374A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2591618A (en) * | 2020-01-31 | 2021-08-04 | Element Six Uk Ltd | Polycrystalline cubic boron nitride material |
| GB2591618B (en) * | 2020-01-31 | 2023-05-17 | Element Six Uk Ltd | Polycrystalline cubic boron nitride material |
| US11827571B2 (en) | 2020-01-31 | 2023-11-28 | Element Six (Uk) Limited | Polycrystalline cubic boron nitride material |
Also Published As
| Publication number | Publication date |
|---|---|
| BE607842A (en) | 1962-01-02 |
| CH450374A (en) | 1968-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB975316A (en) | Improvements in or relating to compacts containing diamond and/or boron nitride | |
| ES460134A1 (en) | Manufacture of alkanols | |
| ES389963A1 (en) | Diamond tools for machining | |
| GB990818A (en) | Improvements in or relating to boron nitride | |
| GB1410813A (en) | Housings for electrical components | |
| ES391619A1 (en) | Ferrous alloys | |
| GB962480A (en) | Stable dispersoid composites and production thereof | |
| GB1000702A (en) | Improvements in or relating to the manufacture of diamonds | |
| GB860499A (en) | Methods of making cubic boron nitride | |
| ES8602433A1 (en) | Improved sweep through process for making polycrystalline compacts. | |
| GB1382080A (en) | Method of preparing a diamond-metal compact | |
| GB967484A (en) | Thermocouples | |
| US4103100A (en) | Cell adapted for producing high temperatures and high pressures | |
| GB1105167A (en) | A process for the manufacture of metal-aluminium hydrides | |
| GB723197A (en) | Stone-cutting cable saw | |
| GB921795A (en) | Improvements in and relating to copper-base alloys | |
| GB601057A (en) | Improved method of consolidating metal powder to dense coherent form | |
| ES333270A1 (en) | A procedure to produce an alloy of nickel-chromocobalt-iron. (Machine-translation by Google Translate, not legally binding) | |
| GB943390A (en) | Improvements in nickel-base brazing alloy | |
| GB1112937A (en) | Improvements in alloys | |
| Willhoft | The importance of defects in nickel on the catalytic dehydrogenation of formic acid at low pressures | |
| GB1173838A (en) | Process for Producing Catalysts of the Raney Type | |
| JPS5515981A (en) | Diamond sintered body | |
| SU364470A1 (en) | Gauge Box | |
| GB955730A (en) | Preparation of metal borides |