GB1000702A - Improvements in or relating to the manufacture of diamonds - Google Patents

Improvements in or relating to the manufacture of diamonds

Info

Publication number
GB1000702A
GB1000702A GB2931861A GB2931861A GB1000702A GB 1000702 A GB1000702 A GB 1000702A GB 2931861 A GB2931861 A GB 2931861A GB 2931861 A GB2931861 A GB 2931861A GB 1000702 A GB1000702 A GB 1000702A
Authority
GB
United Kingdom
Prior art keywords
catalyst
metal
graphite
temperature
reaction vessel
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
GB2931861A
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 GB1000702A publication Critical patent/GB1000702A/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
    • B01J3/065—Presses for the formation of diamonds or boronitrides
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/004—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses involving the use of very high pressures
    • 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
    • B01J2203/0625—Carbon
    • 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
    • B01J2203/068—Crystal growth

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Catalysts (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Adornments (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

A polycrystalline compact of synthesized diamond embedded in a metal matrix prepared by the method of the invention (see Division C1), is used as an abrasive material. The diamond compact may or may not be attached to a tool holder.ALSO:<FORM:1000702/C1/1> <FORM:1000702/C1/2> A diamond compact is synthesized by subjecting carbonaceous material to high temperatures and pressures in the presence of a metal catalyst, diamond growth being confined to the carbonaceous materialmetal catalyst combination by a metal shield, in the form of an enclosure, which does not melt under the high temperature-high pressure conditions of the reaction, and which has a higher melting point than the catalyst. The shield, 32, which is of nickel, iron, chromium, or their alloys, may be regular or irregular in shape, e.g. tube, sphere, rectangular parallelepiped, and contains catalyst discs, 37, 38, of chromium, manganese, tantalum, or a Group VIII metal, together with carbonaceous material, 35, e.g. graphite, coke, coal, sugar or charcoal, the remaining volume of 32 being also filled with graphite. The catalyst may take the form of discs, spheres, wires or tubes, and may assume various positions within the metal enclosure. 32 is placed in the reaction vessel, which comprises a hollow cylinder of pyrophilite, talc, or carlinite, containing a graphite tube and a liner of alumina or graphite, and subjected to 75,000 atmos. by means of a press apparatus and heated electrically to 1300-1450 DEG C., the temperature and pressure being subsequently reduced to atmospheric. The diamond compact, 31, is then removed from the reaction vessel, and the metal shield is either stripped from it, or retained to facilitate soldering, or brazing of the compact on to a part, e.g. wheel, grinding, or cutting element, of a suitable tool. Alternatively, the reaction vessel may be subjected to a "ratcheting" process whereby the pressure is increased to 75,000 atmos., and the temperature raised to 1200 DEG C., these conditions being maintained for 10 minutes, after which time the reaction vessel is cooled to atmospheric temperature by interrupting the electric power for 2 minutes, and then reheated to 1350-1450 DEG C. over a period of 20-30 minutes, before finally reducing the temperature and pressure to atmospheric. Compacts of various shapes may be formed, e.g. by employing end discs which do not touch the sides of the cylindrical metal shield, by varying the spacing between the catalyst disc assemblies, by using end discs which have hemispherical portions removed from them, and by including a spool member within the metal tube to define an annular volume. Specifications 830,210 and 830,743 are referred to.
GB2931861A 1960-09-19 1961-08-14 Improvements in or relating to the manufacture of diamonds Expired GB1000702A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5678460A 1960-09-19 1960-09-19
US26941263A 1963-04-01 1963-04-01

Publications (1)

Publication Number Publication Date
GB1000702A true GB1000702A (en) 1965-08-11

Family

ID=26735705

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2931861A Expired GB1000702A (en) 1960-09-19 1961-08-14 Improvements in or relating to the manufacture of diamonds
GB1338664A Expired GB1069801A (en) 1960-09-19 1964-04-01 Improvements in diamond growth

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1338664A Expired GB1069801A (en) 1960-09-19 1964-04-01 Improvements in diamond growth

Country Status (5)

Country Link
CH (2) CH481842A (en)
DE (2) DE1427368B2 (en)
GB (2) GB1000702A (en)
NL (2) NL131149C (en)
SE (2) SE303739B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101890322A (en) * 2010-07-30 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block with uniform stress on each part
CN101890321A (en) * 2010-07-29 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block for improving internal density
US20150041225A1 (en) * 2012-03-30 2015-02-12 Element Six Abrasives S.A. Polycrystalline superhard material and method for making same
CN104540620A (en) * 2012-06-20 2015-04-22 六号元素磨料股份有限公司 Cutting inserts and method for making same
CN109966994A (en) * 2019-04-26 2019-07-05 河南省力量钻石股份有限公司 A kind of diamond synthesizing compound block for transmitting pressure and preparation method thereof
CN111359537A (en) * 2019-08-30 2020-07-03 三河市晶日金刚石复合材料有限公司 Composite sheet synthetic block
RU2735087C1 (en) * 2020-03-12 2020-10-28 Федеральное государственное бюджетное учреждение науки Институт физики высоких давлений им. Л.Ф. Верещагина Российской академии наук (ИФВД РАН) Method of producing polycrystalline diamond material with a hole

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA781154B (en) * 1978-02-28 1979-09-26 De Beers Ind Diamond Abrasive bodies
US4246005A (en) * 1978-04-01 1981-01-20 Hiroshi Ishizuka Diamond aggregate abrasive materials for resin-bonded applications
GB201105957D0 (en) 2011-04-08 2011-05-18 Element Six Ltd Containment element

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101890321A (en) * 2010-07-29 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block for improving internal density
CN101890322A (en) * 2010-07-30 2010-11-24 郑州人造金刚石及制品工程技术研究中心有限公司 Synthetic block with uniform stress on each part
US20150041225A1 (en) * 2012-03-30 2015-02-12 Element Six Abrasives S.A. Polycrystalline superhard material and method for making same
US10071354B2 (en) * 2012-03-30 2018-09-11 Element Six Abrasives S.A. Polycrystalline superhard material and method for making same
CN104540620A (en) * 2012-06-20 2015-04-22 六号元素磨料股份有限公司 Cutting inserts and method for making same
US20150151362A1 (en) * 2012-06-20 2015-06-04 Element Six Abraxives S.A. Cutting inserts and method for making same
US10071355B2 (en) * 2012-06-20 2018-09-11 Element Six Abrasives S.A. Cutting inserts and method for making same
CN109966994A (en) * 2019-04-26 2019-07-05 河南省力量钻石股份有限公司 A kind of diamond synthesizing compound block for transmitting pressure and preparation method thereof
CN111359537A (en) * 2019-08-30 2020-07-03 三河市晶日金刚石复合材料有限公司 Composite sheet synthetic block
RU2735087C1 (en) * 2020-03-12 2020-10-28 Федеральное государственное бюджетное учреждение науки Институт физики высоких давлений им. Л.Ф. Верещагина Российской академии наук (ИФВД РАН) Method of producing polycrystalline diamond material with a hole

Also Published As

Publication number Publication date
SE343609B (en) 1972-03-13
CH461445A (en) 1968-08-31
DE1427368B2 (en) 1970-08-13
NL131149C (en)
DE1427368A1 (en) 1969-04-30
DE1277829B (en) 1968-09-19
SE303739B (en) 1968-09-09
NL269351A (en)
CH481842A (en) 1969-11-30
GB1069801A (en) 1967-05-24

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