GB1500817A - Diamonds - Google Patents

Diamonds

Info

Publication number
GB1500817A
GB1500817A GB16785/75A GB1678575A GB1500817A GB 1500817 A GB1500817 A GB 1500817A GB 16785/75 A GB16785/75 A GB 16785/75A GB 1678575 A GB1678575 A GB 1678575A GB 1500817 A GB1500817 A GB 1500817A
Authority
GB
United Kingdom
Prior art keywords
diamond
pressure
charge
region
temperature
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
Application number
GB16785/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1500817A publication Critical patent/GB1500817A/en
Expired legal-status Critical Current

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
    • B01J3/062—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies characterised by the composition of the materials to be processed
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1409—Abrasive particles per se
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0605—Composition of the material to be processed
    • B01J2203/062—Diamond
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/065—Composition of the material produced
    • B01J2203/0655—Diamond
    • 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
    • B01J2203/00—Processes utilising sub- or super atmospheric pressure
    • B01J2203/06—High pressure synthesis
    • B01J2203/0675—Structural or physico-chemical features of the materials processed
    • B01J2203/069—Recrystallisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

1500817 Work-hardened diamond GENERAL ELECTRIC CO 23 April 1975 [30 May 1974] 16785/75 Heading C1A A work-hardened diamond is prepared and mounted by a process comprising (a) filling an enclosure with a charge composed solely of discrete diamond crystals or at least one diamond crystal together with loose crystalline diamond or cubic boron nitride as embedment material therefor, (b) subjecting said enclosure and said charge to the simultaneous application of pressure and temperature conditions located in the region of plastic deformation as shown in the carbon phase diagram of Fig. I for a period in excess of 1 minute, (c) reducing the temperature to below 50C, (d) reducing the pressure to atmospheric pressure, (e) recovering the diamond content having deformation lamallae introduced therein from said charge. The charge may be solely diamond crystals of 5 to 500 micrometres size range. Pressure and temperature conditions simultaneously applied may be in the diamond-stable region of the carbon phase diagram, a maximum pressure of 55 kilobars and a maximum temperature of 1500C being preferred, or may be in the plastic deformation region of the diagram.
GB16785/75A 1974-05-30 1975-04-23 Diamonds Expired GB1500817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47471974A 1974-05-30 1974-05-30

Publications (1)

Publication Number Publication Date
GB1500817A true GB1500817A (en) 1978-02-15

Family

ID=23884679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16785/75A Expired GB1500817A (en) 1974-05-30 1975-04-23 Diamonds

Country Status (12)

Country Link
JP (1) JPS5713488B2 (en)
BE (1) BE829717A (en)
CA (1) CA1091938A (en)
CH (1) CH601105A5 (en)
DE (1) DE2519116C2 (en)
FR (1) FR2275405A1 (en)
GB (1) GB1500817A (en)
IE (1) IE41288B1 (en)
IT (1) IT1038378B (en)
NL (1) NL7506342A (en)
SE (1) SE417161B (en)
ZA (1) ZA752274B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014589A1 (en) * 1979-02-08 1980-08-20 De Beers Industrial Diamond Division (Proprietary) Limited A method of making diamond particles and metal bond abrasive body produced therewith
EP0460306A1 (en) * 1988-08-29 1991-12-11 Exxon Research And Engineering Company Fabricating fracture-resistant diamond and diamond composite articles
US8110041B2 (en) 2002-09-06 2012-02-07 Daniel James Twitchen Coloured diamond

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168957A (en) * 1983-03-17 1984-09-22 Akai Electric Co Ltd Repeated reproducing device of tape player or the like

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574580A (en) * 1968-11-08 1971-04-13 Atomic Energy Commission Process for producing sintered diamond compact and products
FR2026389A1 (en) * 1968-12-18 1970-09-18 Hall Howard

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014589A1 (en) * 1979-02-08 1980-08-20 De Beers Industrial Diamond Division (Proprietary) Limited A method of making diamond particles and metal bond abrasive body produced therewith
EP0460306A1 (en) * 1988-08-29 1991-12-11 Exxon Research And Engineering Company Fabricating fracture-resistant diamond and diamond composite articles
US8110041B2 (en) 2002-09-06 2012-02-07 Daniel James Twitchen Coloured diamond

Also Published As

Publication number Publication date
IE41288L (en) 1975-11-30
DE2519116A1 (en) 1975-12-18
IE41288B1 (en) 1979-12-05
CA1091938A (en) 1980-12-23
DE2519116C2 (en) 1984-12-20
SE417161B (en) 1981-03-02
FR2275405A1 (en) 1976-01-16
JPS5713488B2 (en) 1982-03-17
ZA752274B (en) 1976-03-31
IT1038378B (en) 1979-11-20
NL7506342A (en) 1975-12-02
BE829717A (en) 1975-09-15
CH601105A5 (en) 1978-06-30
JPS515293A (en) 1976-01-16
SE7506226L (en) 1975-12-01
FR2275405B1 (en) 1979-04-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee