Patent EP0116403A1 successfully refreshed from Google Patents.
EP0116403A1
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Abrasive product
Assignee: De Beers Industrial Diamond Division Pty Ltd
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Filing: 1984-01-09
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Granted: —
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Expires: 2004-01-09
Abstract
Abstract An abrasive body (12) is provided which has high strength and an ability to withstand high temperatures making it suitable as a tool insert for dressing tools and surface set drill bits. The body comprises a mass of diamond particles present in an amount of 80 to 90 percent by volume of the body and a second phase present in an amount of 10 to 20 percent by volume of the body, the mass of diamond particles containing substantial diamond-to-diamond bonding to form a coherent skeletal mass and the second phase containing nickel and silicon, the nickel being in the form of nickel and/or nickel silicide and the silicon being in the form of silicon, silicon carbide and/or nickel silicide. The abrasive bodies are made under conditions of elevated temperature and pressure suitable for diamond compact manufacture.
Inventors
- 👤 Cornelius Phaal
- 👤 Noel John Pipkin
- 👤 Richard Patrick Burnand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 23:51
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5673; B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B24D3/10; B24D99/00; B24D99/005; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; C; C22; C22C; C22C26/00; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/0685
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
An abrasive body comprising a mass of diamond particles present in an amount of 80 to 90 percent by volume of the body and a second phase present in an amount of 10 to 20 percent by volume of the body, the mass of diamond particles containing substantial diamond-to-diamond bonding to form a coherent skeletal mass and the second phase containing nickel and silicon, the nickel being in the form of nickel and/or nickel silicide and the silicon being in the form of silicon, silicon carbide, and/or nickel silicide.
Claim 2
Dependent Claim
89 words
An abrasive body comprising a mass of diamond particles present in an amount of 80 to 90 percent by volume of the body and a second phase present in an amount of 10 to 20 percent by volume of the body, the mass of diamond particles containing substantial diamond-to-diamond bonding to form a coherent skeletal mass and the second phase containing nickel and silicon, the nickel being in the form of nickel and/or nickel silicide and the silicon being in the form of silicon, silicon carbide, and/or nickel silicide.
Claim 3
Dependent Claim
21 words
An abrasive body according to claim 1 wherein the second phase constitutes 15 to 20 percent by volume of the body.
Claim 4
Dependent Claim
32 words
An abrasive body according to claim 1 or claim 2 wherein the ratio of silicon to nickel in the second phase is in the range 90:10 to 50:50 on a weight basis.
Claim 5
Dependent Claim
19 words
An abrasive body according to any one of the preceding claims having a disc, triangular, cube or rectangular shape.
Claim 6
Dependent Claim
29 words
A dressing tool comprising a tool shank and an abrasive body according to any one of the preceding claims mounted in one end thereof to present a dressing edge.
Claim 7
Dependent Claim
43 words
A surface set drill bit comprising a rotatable body presenting at one end thereof a cutting face, the cutting face having a plurality of abrasive bodies according to any one of the preceding claims mounted therein to present cutting edges for the face.
Claim 8
Independent Claim
104 words
A method of producing an abrasive body according to any one of claims 1 to 4 including the steps of: (a) placing a mass of diamond particles in a reaction vessel; (b) placing a mass.of nickel and silicon on the mass of diamond particles; (c) placing the loaded reaction vessel in the reaction zone of a high temperature/high pressure apparatus; (d) subjecting the contents of the reaction vessel to conditions of elevated temperature and pressure in the diamond stable region of the carbon phase diagram for a time sufficient to produce the abrasive body; and (e) recovering the abrasive body from the reaction zone.
Claim 9
Dependent Claim
20 words
A method of claim 7 wherein discrete layers of nickel and silicon are placed on the mass of diamond particles.
Claim 10
Dependent Claim
29 words
A method according to claim 8 wherein the layer of nickel is placed in contact with the diamond particles and the layer of silicon placed on the nickel layer.
Claim 11
Independent Claim
22 words
A method according to any one of claims 7 to 9 wherein the diamond particles are less than 100 microns in size.
Claim 12
Independent Claim
25 words
A method according to any one of claims 7 to 9 wherein the diamond particles have a size in the range 60 to 75 microns.
References Cited (Backward Citations)
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