GB1423157A - Method for producing polycrystalline diamond aggregates of predetermined shape - Google Patents

Method for producing polycrystalline diamond aggregates of predetermined shape

Info

Publication number
GB1423157A
GB1423157A GB5785972A GB5785972A GB1423157A GB 1423157 A GB1423157 A GB 1423157A GB 5785972 A GB5785972 A GB 5785972A GB 5785972 A GB5785972 A GB 5785972A GB 1423157 A GB1423157 A GB 1423157A
Authority
GB
United Kingdom
Prior art keywords
blank
diamond
polycrystalline diamond
predetermined shape
particle size
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
GB5785972A
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.)
INST FIZIKI VYSOKIKH DAVLENY
Original Assignee
INST FIZIKI VYSOKIKH DAVLENY
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 INST FIZIKI VYSOKIKH DAVLENY filed Critical INST FIZIKI VYSOKIKH DAVLENY
Priority to GB5785972A priority Critical patent/GB1423157A/en
Publication of GB1423157A publication Critical patent/GB1423157A/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
    • B01J2203/061—Graphite
    • 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)
  • Carbon And Carbon Compounds (AREA)

Abstract

1423157 Diamond synthesis INSTITUT FIZIKI VYSOKIKH DAVLENY AKADEMII NAUK SSSR 14 Dec 1972 57859/72 Heading C1A Polycrystalline diamond aggregates of predetermined shape are produced by forming a blank of a non-diamond carbonaceous material, e.g. spectral graphite, immersing the blank in a powdered catalyst having a particle size of from 1 to 5 Á, e.g. Group VIII metals of the Periodic System, alloys thereof, carbides and metal carbide systems, subjecting the blank whilst immersed in the catalyst to a pressure of at least 80 kbar and a temperature of at least 1500‹ C. for a period of from 0À1 to 10 seconds to form the diamond aggregate. The blank should have dimensions exceeding the desired dimensions of the polycrystalline diamond aggregate by from 20 to 30% and should preferably be prepared from graphite of density at least 2À00 grams/c.c. and particle size 300- 1000 Š. In the apparatus of Fig. 1, a high temperature reaction cell 1 is disposed in a container 2 of lithographic stone which is placed in a chamber which can be maintained at high temperature and pressure by means of heater 3, 3a and an hydraulic press (not shown). Blank 4 may be in the shape of a nut, an octahedron, screw, draw-plate or two conical vessels. Diamond articles are removed from the reaction cell by means of hydrofluoric and nitric acid treatment.
GB5785972A 1972-12-14 1972-12-14 Method for producing polycrystalline diamond aggregates of predetermined shape Expired GB1423157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5785972A GB1423157A (en) 1972-12-14 1972-12-14 Method for producing polycrystalline diamond aggregates of predetermined shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5785972A GB1423157A (en) 1972-12-14 1972-12-14 Method for producing polycrystalline diamond aggregates of predetermined shape

Publications (1)

Publication Number Publication Date
GB1423157A true GB1423157A (en) 1976-01-28

Family

ID=10480197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5785972A Expired GB1423157A (en) 1972-12-14 1972-12-14 Method for producing polycrystalline diamond aggregates of predetermined shape

Country Status (1)

Country Link
GB (1) GB1423157A (en)

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Legal Events

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