GB1240525A - Improvements in diamond compacts - Google Patents

Improvements in diamond compacts

Info

Publication number
GB1240525A
GB1240525A GB3680168A GB3680168A GB1240525A GB 1240525 A GB1240525 A GB 1240525A GB 3680168 A GB3680168 A GB 3680168A GB 3680168 A GB3680168 A GB 3680168A GB 1240525 A GB1240525 A GB 1240525A
Authority
GB
United Kingdom
Prior art keywords
diamonds
pan
temp
treatments
cathode
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
GB3680168A
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 GB1240525A publication Critical patent/GB1240525A/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
    • 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
    • B01J2203/0685—Crystal sintering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

1,240,525. Diamonds. GENERAL ELECTRIC CO. 1 Aug., 1968 [8 Sept., 1967], No. 36801/68. Heading C1A. Polycrystalline diamond compacts containing not more than 2% by wt. of material other than diamond, having a density in excess of 91% of the theoretical and being substantially homogeneous are produced by either: (i) heating fine diamond particles at a temp. of 600-900‹ C., or (ii) bombarding fine diamond particles with +ve ions in an inert atmosphere (as defined) at subatmospheric pressures. After either of these two treatments the diamonds are compacted at a pressure >50 kilobars and a temp. of 1300‹ C. Fig. 1 is a diagram of the equipment required for either of the first two treatments. 1 is a pan of Mo, Co, Ti on which the diamonds are placed. For ion bombardment anode 4 and the pan 1 acting as cathode are wired to a D.C. supply which produces a voltage differential of between 1500 and 1800 volts. Agitation of the cathode can be carried out by a solenoid-actuated vibrator 8. For the heating process, a resistance heater 9 beneath the pan is used. Fig. 2 is a diagram of the reaction vessel for use in the high pressure, high temp., compacting step. The reaction vessel 17 is of the indirectly heated type having a pyrophyllite outer cylinder 18 and a graphite heating tube 19. Another cylinder 20 of alumina is placed inside the heating tube and a liner 21 of graphite is placed inside the alumina cylinder. Matrix materials that may be used to form the compacts are B, Ta, Mo, Ti or their carbides or borides. The compact however should not contain more than 2% by wt. of matrix material. The sintering stage is carried out in an inert atm. or preferably a reducing atm. An inert atmosphere is defined as an atmosphere free from oxygen, nitrogen and water vapour.
GB3680168A 1967-09-08 1968-08-01 Improvements in diamond compacts Expired GB1240525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66629067A 1967-09-08 1967-09-08

Publications (1)

Publication Number Publication Date
GB1240525A true GB1240525A (en) 1971-07-28

Family

ID=24673611

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3680168A Expired GB1240525A (en) 1967-09-08 1968-08-01 Improvements in diamond compacts

Country Status (9)

Country Link
BE (1) BE720499A (en)
CA (1) CA1078196A (en)
CH (1) CH517662A (en)
DE (1) DE1792453C3 (en)
FR (1) FR1579799A (en)
GB (1) GB1240525A (en)
IE (1) IE32229B1 (en)
NL (1) NL167933C (en)
SE (1) SE338305B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524401A (en) * 2014-03-18 2015-09-23 Element Six Uk Ltd Superhard constructions & methods of making same
CN113813878B (en) * 2021-10-09 2023-10-13 安徽宏晶新材料股份有限公司 Double-heating-layer diamond synthesizing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2259538C3 (en) * 1972-12-05 1982-03-25 Institut fiziki vysokich davlenij Akademii Nauk SSSR, Akademgorodok, Moskovskaya oblast' Process for the production of diamond metal materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524401A (en) * 2014-03-18 2015-09-23 Element Six Uk Ltd Superhard constructions & methods of making same
CN113813878B (en) * 2021-10-09 2023-10-13 安徽宏晶新材料股份有限公司 Double-heating-layer diamond synthesizing device

Also Published As

Publication number Publication date
CH517662A (en) 1972-01-15
DE1792453C3 (en) 1975-01-02
IE32229L (en) 1969-03-08
NL167933B (en) 1981-09-16
FR1579799A (en) 1969-08-29
DE1792453B2 (en) 1974-05-22
SE338305B (en) 1971-09-06
IE32229B1 (en) 1973-05-16
NL167933C (en) 1982-02-16
NL6812548A (en) 1969-03-11
DE1792453A1 (en) 1972-02-10
CA1078196A (en) 1980-05-27
BE720499A (en) 1969-02-17

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