US3879901A - Metal-coated diamonds in a metal alloy matrix - Google Patents
Metal-coated diamonds in a metal alloy matrix Download PDFInfo
- Publication number
- US3879901A US3879901A US395457A US39545773A US3879901A US 3879901 A US3879901 A US 3879901A US 395457 A US395457 A US 395457A US 39545773 A US39545773 A US 39545773A US 3879901 A US3879901 A US 3879901A
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- matrix
- metal
- alloy
- compact
- titanium
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Classifications
-
- 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
- C09K3/1436—Composite particles, e.g. coated particles
- C09K3/1445—Composite particles, e.g. coated particles the coating consisting exclusively of metals
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- 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
- B01J2203/065—Composition of the material produced
- B01J2203/066—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
- 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
Definitions
- This invention relates to compacts and it is an object of the present invention to provide a compact having improved properties over compacts of the prior art.
- a compact comprising substantially graphite-free diamond particles having a continuous coating of titanium or molybdenum held in a matrix compatible with the titanium or molybdenum coating.
- compatible means that the matrix must be such as allow diffusion of the titanium or molybdenum into it.
- the matrix may be an alloy selected from the group of Fe/Ni, Ni/Co/Cr/Fe, Fe/Si, Ti/Si, Ti/Ni and Ti/Fe a1- loys, but is preferably one of the following alloys: Nil- Co/Cr/Fe:: 34/18/14/5 Fe/Ni:: 12/5 Fe/Si:: 63/2 All the above-mentioned ratios are weight for weight.
- the matrix may also advantageously be tungsten carbide bonded with a transition metal of the 8th group, preferably cobalt.
- the transition metal is preferably present in the amount of about 10 percent by weight of the tungsten carbide.
- the thickness of the titanium or molybdenum coat would normally be of the order of 1,000 to 2,000A, but coats of greater thickness can also be used.
- the titanium or molybdenum coated diamonds for use in the compacts may be prepared by methods known to the art.
- the coating may, for example, be deposited on to the diamond surface by the method of vacuum deposition described in Vacuum Deposition of Thin Films" by L. Holland, Chapman and Hall, 1st Edition 1956.
- the coated diamond may be heated to a temperature of greater then 500C to form the desired bond.
- this heating is not necessary as the during compact manufacture temperatures above 500C are encountered and the bond formation can therefore be obtained during the compact manufacture.
- a method of making a compact including the steps mixing diamond particles having a continuous coating of titanium or molybdenum with a matrix material suitable to provide, on compaction, a matrix compatible with the titanium or molybdenum coating of the particles and compacting the mixture under pressure and temperature conditions in the diamond stable zone.
- the diamond stable zone is a set of conditions known to the art and the Applicant refers to Berman R, and Simon F, Z. Elektrochem, Vol 59, 1955 page 333 in this regard.
- the pressure during compaction is about 60 kilobars and the temperature is between about 1,200 and 1,400C.
- Diamond compacts having a variety of matrices were prepared in the following manner:
- diamond grit having a continuous titanium or molybdenum coating and the metal powders necessary to make the desired alloy were weighed into a plastic bottle. If for example, an iron/nickel alloy 12:5) was desired then 12 parts by weight of iron powder and 5 parts by weight of nickel powder were weighed into the bottle. The metal powders and grit were then mixed by placing the bottle in a milling machine for about 20 minutes. The mixture was placed in a graphite mould and loaded into a standard synthesis capsule. 1f the synthesis volume was not completely filled by the mould, compacted graphite was added to the capsule to fill the balance of the volume.
- the mixture was then subjected to compaction for about five minutes at a pressure of about 60 kilobars and a temperature of between l,200 and 1,400C. These temperatures and pressures are in the diamond stable zone.
- Table I sets out the diamond grit particle size and the matrix material used in these compacts.
- the diamond content of the compacts was 65% Vol/Vol.
- the above mentioned compacts were compared in properties with a compact comprising uncoated diamond grit in a titanium-silicon matrix and it was found on an average that the grinding efficiency ratios of the invented compacts were greater than 1.
- the efficiency ratio is the ratio of wear under a set of abrading conditions of the invented compact to the wear under the same set of conditions of the standard compact times a conversion factor.
- the conversion factor reflects the differing densities of the matrices.
- a value of greater than 1 indicates that the invented compact has superior abrasion resistance to the standard compact.
- the most significant were those obtained for the compacts having Fe/Ni, WC bonded with 10% Co, Ni/Co/Cr/Fe, and Fe/Si matrices where the efficiency ratios were found to be 1.59, 4.53, 3.79 and 1.50, respectively.
- a compact consisting essentially of substantially graphite-free diamond particles having a continuous metal coating of thickness from 1,000 to 2,000A chemically bonded thereto and held in a matrix by a diffu sion alloy of the metal and the matrix at the metal/matrix interface, the metal being selected from the group consisting of titanium and molybdenum and the matrix being selected from the group consisting of Fe/Ni, Nil- Co/Cr/Fe and Fe/Si alloys and WC bonded with a transition metal of the V111 group, said compact having a grinding efficiency ratio greater than 1.
- a compact according to claim 1 wherein the matrix is an Fe/Si alloy the ratio of the iron to the silicon in the alloy being 63/2.
Abstract
A compact comprising substantially graphite-free diamond particles having a continuous coating of titanium or molybdenum held in a matrix into which the titanium or molybdenum can diffuse. The matrix may for example, be an alloy selected from the group of Fe/Ni, Ni/Co/Cr/Fe, Fe/Si and Ti/Si alloys. The invention also provides a method of making such a compact by mixing the desired metal powders in suitable proportions with the coated diamond particles and compacting the mixture under pressure and temperature conditions in the diamond stable zone.
Description
United States Patent [191 Caveney Apr. 29, 1975 1 METAL-COATED DIAMONDS IN A METAL ALLOY MATRIX [75] Inventor: Robert John Caveney,
Johannesburg, South Africa [73] Assignee: De Beers Industrial Diamond Division Limited, Johannesburg, South Africa 22 Filed: Sept. 10, 1973 211 Appl. No.: 395,457
Related US Application Data [63] Continuation of Scr. No. 153,105, June 14, 1971,
abandoned.
[30] Foreign Application Priority Data June 24, 1970 South Africa 70/4347 [52] US. Cl 51/295; 5 l/309 [51] Int. Cl B24d 3/06 [58] Field of Search 51/295, 309
[56] References Cited UNITED STATES PATENTS 3.239.321 3/1966 Blaine) ct a1. 51/309 3,306,720 2/1967 Darrow 51/309 3,316,073 4/1967 Kelso 51/295 3,351,543 11/1967 Vanderslice 51/309 3,356,473 12/1967 Hull et a1. 51/309 3,464,804 9/1969 Kuratomi.... 51/309 3/1972 Farkas 51/309 Primary E.\'aminerDonald J. Arnold Attorney, Agent, or FirmYoung & Thompson [57] ABSTRACT 5 Claims, No Drawings METAL-COATED DIAMONDS IN A METAL ALLOY MATRIX This is a continuation of application Ser. No. 153,105, filed June 14, 1971, and now abandoned.
This invention relates to compacts and it is an object of the present invention to provide a compact having improved properties over compacts of the prior art.
According to the invention there is provided a compact comprising substantially graphite-free diamond particles having a continuous coating of titanium or molybdenum held in a matrix compatible with the titanium or molybdenum coating. The term compatible means that the matrix must be such as allow diffusion of the titanium or molybdenum into it.
The matrix may be an alloy selected from the group of Fe/Ni, Ni/Co/Cr/Fe, Fe/Si, Ti/Si, Ti/Ni and Ti/Fe a1- loys, but is preferably one of the following alloys: Nil- Co/Cr/Fe:: 34/18/14/5 Fe/Ni:: 12/5 Fe/Si:: 63/2 All the above-mentioned ratios are weight for weight.
The matrix may also advantageously be tungsten carbide bonded with a transition metal of the 8th group, preferably cobalt. The transition metal is preferably present in the amount of about 10 percent by weight of the tungsten carbide.
The thickness of the titanium or molybdenum coat would normally be of the order of 1,000 to 2,000A, but coats of greater thickness can also be used.
The titanium or molybdenum coated diamonds for use in the compacts may be prepared by methods known to the art. The coating may, for example, be deposited on to the diamond surface by the method of vacuum deposition described in Vacuum Deposition of Thin Films" by L. Holland, Chapman and Hall, 1st Edition 1956. In order to create a titanium/diamond or molybdenum/diamond bond, as the case may be, the coated diamond may be heated to a temperature of greater then 500C to form the desired bond. However, this heating is not necessary as the during compact manufacture temperatures above 500C are encountered and the bond formation can therefore be obtained during the compact manufacture.
Further according to the invention, there is provided a method of making a compact including the steps mixing diamond particles having a continuous coating of titanium or molybdenum with a matrix material suitable to provide, on compaction, a matrix compatible with the titanium or molybdenum coating of the particles and compacting the mixture under pressure and temperature conditions in the diamond stable zone.
The diamond stable zone is a set of conditions known to the art and the Applicant refers to Berman R, and Simon F, Z. Elektrochem, Vol 59, 1955 page 333 in this regard.
Preferably, the pressure during compaction is about 60 kilobars and the temperature is between about 1,200 and 1,400C.
Embodiments of the invention will now be described.
Diamond compacts having a variety of matrices were prepared in the following manner:
ln all cases, diamond grit having a continuous titanium or molybdenum coating and the metal powders necessary to make the desired alloy were weighed into a plastic bottle. If for example, an iron/nickel alloy 12:5) was desired then 12 parts by weight of iron powder and 5 parts by weight of nickel powder were weighed into the bottle. The metal powders and grit were then mixed by placing the bottle in a milling machine for about 20 minutes. The mixture was placed in a graphite mould and loaded into a standard synthesis capsule. 1f the synthesis volume was not completely filled by the mould, compacted graphite was added to the capsule to fill the balance of the volume.
The mixture was then subjected to compaction for about five minutes at a pressure of about 60 kilobars and a temperature of between l,200 and 1,400C. These temperatures and pressures are in the diamond stable zone.
Using the above-mentioned method a number of diamond compacts were manufactured. Table I below sets out the diamond grit particle size and the matrix material used in these compacts.
In all the above cases, the diamond content of the compacts was 65% Vol/Vol.
The above mentioned compacts were compared in properties with a compact comprising uncoated diamond grit in a titanium-silicon matrix and it was found on an average that the grinding efficiency ratios of the invented compacts were greater than 1. The efficiency ratio is the ratio of wear under a set of abrading conditions of the invented compact to the wear under the same set of conditions of the standard compact times a conversion factor. The conversion factor reflects the differing densities of the matrices.
A value of greater than 1 indicates that the invented compact has superior abrasion resistance to the standard compact. Of the results, the most significant were those obtained for the compacts having Fe/Ni, WC bonded with 10% Co, Ni/Co/Cr/Fe, and Fe/Si matrices where the efficiency ratios were found to be 1.59, 4.53, 3.79 and 1.50, respectively.
We claim:
1. A compact consisting essentially of substantially graphite-free diamond particles having a continuous metal coating of thickness from 1,000 to 2,000A chemically bonded thereto and held in a matrix by a diffu sion alloy of the metal and the matrix at the metal/matrix interface, the metal being selected from the group consisting of titanium and molybdenum and the matrix being selected from the group consisting of Fe/Ni, Nil- Co/Cr/Fe and Fe/Si alloys and WC bonded with a transition metal of the V111 group, said compact having a grinding efficiency ratio greater than 1.
2. A compact according to claim 1, wherein the matrix is an Fe/Ni alloy the ratio of iron to nickel in the alloy being 12/5.
3. A compact according to claim 1, wherein the matrix is a Ni/Co/Cr/Fe alloy, the ratio of the metals in the alloy being 34/18/14/5. I
4. A compact according to claim 1 wherein the matrix is an Fe/Si alloy the ratio of the iron to the silicon in the alloy being 63/2.
5. A compact according to claim I wherein the matrix is WC bonded with cobalt which is present in the amount of about 10 percent by weight of the WC.
Claims (5)
1. A COMPACT CONSISTING ESSENTIALLY OF SUBSTANTIALLY GRAPHITE-FREE DIAMOND PARTICLES HAVING A CONTINUOUS METAL COATING OF THICKNESS FROM 1,000 TO 2,000A CHEMICALLY BONDED THERETO AND HELD IN A MATRIX BY A DIFFUSION ALLOY OF THE METAL AND THE MATRIX AT THE METAL/MATRIX INTERFACE, THE METAL BEING SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND MOLYBDENUM AND THE MATRIX BEING SELECTED FROM THE GROUP CONSISING OF FE/NI, NI/CO/CR/FE/ AND FE/SI ALLOYS AND WC BONDED WITH A TRANSITION METAL OF THE VIII GROUP, SAID COMPACT HAVING A GRINDING EFFECIENCY RATIO GREATER THAN 1.
2. A compact according to claim 1, wherein the matrix is an Fe/Ni alloy the ratio of iron to nickel in the alloy being 12/5.
3. A compact according to claim 1, wherein the matrix is a Ni/Co/Cr/Fe alloy, the ratio of the metals in the alloy being 34/18/14/5.
4. A compact according to claim 1 wherein the matrix is an Fe/Si alloy the ratio of the iron to the silicon in the alloy being 63/2.
5. A compact according to claim 1 wherein the matrix is WC bonded with cobalt which is present in the amount of about 10 percent by weight of the WC.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US395457A US3879901A (en) | 1970-06-24 | 1973-09-10 | Metal-coated diamonds in a metal alloy matrix |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA704347A ZA704347B (en) | 1970-06-24 | 1970-06-24 | Diamond compacts |
US15310571A | 1971-06-14 | 1971-06-14 | |
US395457A US3879901A (en) | 1970-06-24 | 1973-09-10 | Metal-coated diamonds in a metal alloy matrix |
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US3879901A true US3879901A (en) | 1975-04-29 |
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US395457A Expired - Lifetime US3879901A (en) | 1970-06-24 | 1973-09-10 | Metal-coated diamonds in a metal alloy matrix |
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Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3929432A (en) * | 1970-05-29 | 1975-12-30 | De Beers Ind Diamond | Diamond particle having a composite coating of titanium and a metal layer |
US3986303A (en) * | 1974-02-27 | 1976-10-19 | Norton Company | Radially adjustable grinding wheel for grinding concave surfaces to constant primary and secondary radii |
US4063909A (en) * | 1974-09-18 | 1977-12-20 | Robert Dennis Mitchell | Abrasive compact brazed to a backing |
US4084942A (en) * | 1975-08-27 | 1978-04-18 | Villalobos Humberto Fernandez | Ultrasharp diamond edges and points and method of making |
US4108614A (en) * | 1976-04-14 | 1978-08-22 | Robert Dennis Mitchell | Zirconium layer for bonding diamond compact to cemented carbide backing |
DE2827425A1 (en) * | 1977-06-24 | 1979-01-11 | De Beers Ind Diamond | METHOD FOR CONNECTING A DIAMOND COMPACT OR CUBIC BORNITRIDE |
US4142869A (en) * | 1973-12-29 | 1979-03-06 | Vereschagin Leonid F | Compact-grained diamond material |
US4184853A (en) * | 1976-04-21 | 1980-01-22 | Andropov Jury I | Individual abrasive grains with a silicon-base alloy coating |
EP0012631A1 (en) * | 1978-12-18 | 1980-06-25 | De Beers Industrial Diamond Division (Proprietary) Limited | Coated abrasive pellets and method of making same |
US4211294A (en) * | 1978-04-21 | 1980-07-08 | Acker Drill Company, Inc. | Impregnated diamond drill bit |
US4373934A (en) * | 1981-08-05 | 1983-02-15 | General Electric Company | Metal bonded diamond aggregate abrasive |
US4452325A (en) * | 1982-09-27 | 1984-06-05 | Conoco Inc. | Composite structure for cutting tools |
US4534934A (en) * | 1980-02-29 | 1985-08-13 | General Electric Company | Axial sweep-through process for preparing diamond wire die compacts |
WO1987007197A1 (en) * | 1986-05-22 | 1987-12-03 | Cline Carl F | Method for production of cermets of abrasive materials |
US4738689A (en) * | 1984-03-20 | 1988-04-19 | General Electric Company | Coated oxidation-resistant porous abrasive compact and method for making same |
DE3714353A1 (en) * | 1987-04-29 | 1988-11-17 | Inst Sverkhtverdykh Mat | Process for producing a diamond-containing composite material |
EP0352811A1 (en) * | 1988-07-29 | 1990-01-31 | Norton Company | Thermally stable superabrasive products and methods of manufacture thereof |
US4943488A (en) * | 1986-10-20 | 1990-07-24 | Norton Company | Low pressure bonding of PCD bodies and method for drill bits and the like |
US4951427A (en) * | 1989-05-30 | 1990-08-28 | General Electric Company | Refractory metal oxide coated abrasives and grinding wheels made therefrom |
US5024680A (en) * | 1988-11-07 | 1991-06-18 | Norton Company | Multiple metal coated superabrasive grit and methods for their manufacture |
US5030276A (en) * | 1986-10-20 | 1991-07-09 | Norton Company | Low pressure bonding of PCD bodies and method |
US5096465A (en) * | 1989-12-13 | 1992-03-17 | Norton Company | Diamond metal composite cutter and method for making same |
US5104422A (en) * | 1989-05-30 | 1992-04-14 | General Electric Company | Refractory metal oxide coated abrasives and grinding wheels made therefrom |
US5116568A (en) * | 1986-10-20 | 1992-05-26 | Norton Company | Method for low pressure bonding of PCD bodies |
EP0503974A1 (en) * | 1991-03-14 | 1992-09-16 | General Electric Company | Multigrain abrasive particles |
US5151107A (en) * | 1988-07-29 | 1992-09-29 | Norton Company | Cemented and cemented/sintered superabrasive polycrystalline bodies and methods of manufacture thereof |
US5224969A (en) * | 1990-07-20 | 1993-07-06 | Norton Company | Diamond having multiple coatings and methods for their manufacture |
US5308367A (en) * | 1991-06-13 | 1994-05-03 | Julien D Lynn | Titanium-nitride and titanium-carbide coated grinding tools and method therefor |
US5588975A (en) * | 1995-05-25 | 1996-12-31 | Si Diamond Technology, Inc. | Coated grinding tool |
US5681653A (en) * | 1995-05-11 | 1997-10-28 | Si Diamond Technology, Inc. | Diamond cutting tools |
US6319608B1 (en) | 2000-05-15 | 2001-11-20 | General Electric Company | Titanium chromium alloy coated diamond crystals for use in saw blade segments and method for their production |
US6447569B1 (en) * | 1999-07-14 | 2002-09-10 | Kimiko Sueta | Diamond containing edge material |
US6641918B1 (en) | 1999-06-03 | 2003-11-04 | Powdermet, Inc. | Method of producing fine coated tungsten carbide particles |
US20090152015A1 (en) * | 2006-06-16 | 2009-06-18 | Us Synthetic Corporation | Superabrasive materials and compacts, methods of fabricating same, and applications using same |
US7806206B1 (en) | 2008-02-15 | 2010-10-05 | Us Synthetic Corporation | Superabrasive materials, methods of fabricating same, and applications using same |
US8316969B1 (en) | 2006-06-16 | 2012-11-27 | Us Synthetic Corporation | Superabrasive materials and methods of manufacture |
US10201890B1 (en) | 2014-03-10 | 2019-02-12 | Tkw, Llc | Sintered metal carbide containing diamond particles and induction heating method of making same |
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Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3929432A (en) * | 1970-05-29 | 1975-12-30 | De Beers Ind Diamond | Diamond particle having a composite coating of titanium and a metal layer |
US4142869A (en) * | 1973-12-29 | 1979-03-06 | Vereschagin Leonid F | Compact-grained diamond material |
US3986303A (en) * | 1974-02-27 | 1976-10-19 | Norton Company | Radially adjustable grinding wheel for grinding concave surfaces to constant primary and secondary radii |
US4063909A (en) * | 1974-09-18 | 1977-12-20 | Robert Dennis Mitchell | Abrasive compact brazed to a backing |
US4084942A (en) * | 1975-08-27 | 1978-04-18 | Villalobos Humberto Fernandez | Ultrasharp diamond edges and points and method of making |
US4108614A (en) * | 1976-04-14 | 1978-08-22 | Robert Dennis Mitchell | Zirconium layer for bonding diamond compact to cemented carbide backing |
US4184853A (en) * | 1976-04-21 | 1980-01-22 | Andropov Jury I | Individual abrasive grains with a silicon-base alloy coating |
DE2827425A1 (en) * | 1977-06-24 | 1979-01-11 | De Beers Ind Diamond | METHOD FOR CONNECTING A DIAMOND COMPACT OR CUBIC BORNITRIDE |
US4211294A (en) * | 1978-04-21 | 1980-07-08 | Acker Drill Company, Inc. | Impregnated diamond drill bit |
EP0012631A1 (en) * | 1978-12-18 | 1980-06-25 | De Beers Industrial Diamond Division (Proprietary) Limited | Coated abrasive pellets and method of making same |
US4534934A (en) * | 1980-02-29 | 1985-08-13 | General Electric Company | Axial sweep-through process for preparing diamond wire die compacts |
US4373934A (en) * | 1981-08-05 | 1983-02-15 | General Electric Company | Metal bonded diamond aggregate abrasive |
US4452325A (en) * | 1982-09-27 | 1984-06-05 | Conoco Inc. | Composite structure for cutting tools |
US4738689A (en) * | 1984-03-20 | 1988-04-19 | General Electric Company | Coated oxidation-resistant porous abrasive compact and method for making same |
WO1987007197A1 (en) * | 1986-05-22 | 1987-12-03 | Cline Carl F | Method for production of cermets of abrasive materials |
US4943488A (en) * | 1986-10-20 | 1990-07-24 | Norton Company | Low pressure bonding of PCD bodies and method for drill bits and the like |
US5116568A (en) * | 1986-10-20 | 1992-05-26 | Norton Company | Method for low pressure bonding of PCD bodies |
US5030276A (en) * | 1986-10-20 | 1991-07-09 | Norton Company | Low pressure bonding of PCD bodies and method |
DE3714353A1 (en) * | 1987-04-29 | 1988-11-17 | Inst Sverkhtverdykh Mat | Process for producing a diamond-containing composite material |
EP0352811A1 (en) * | 1988-07-29 | 1990-01-31 | Norton Company | Thermally stable superabrasive products and methods of manufacture thereof |
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