US3879901A - Metal-coated diamonds in a metal alloy matrix - Google Patents

Metal-coated diamonds in a metal alloy matrix Download PDF

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Publication number
US3879901A
US3879901A US39545773A US3879901A US 3879901 A US3879901 A US 3879901A US 39545773 A US39545773 A US 39545773A US 3879901 A US3879901 A US 3879901A
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Prior art keywords
matrix
fe
alloy
metal
compact
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Expired - Lifetime
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Robert John Caveney
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De Beers Ind Diamond Div Ltd
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De Beers Ind Diamond Div Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; MISCELLANEOUS COMPOSITIONS; MISCELLANEOUS APPLICATIONS OF MATERIALS
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/14Anti-slip materials; Abrasives
    • C09K3/1436Composite particles, e.g. coated particles
    • C09K3/1445Composite particles, e.g. coated particles the coating consisting exclusively of metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/06Processes using ultra high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
    • B01J3/062Processes 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C26/00Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2203/00Processes utilising sub- or super atmospheric pressure
    • B01J2203/06High pressure synthesis
    • B01J2203/0605Composition of the material to be processed
    • B01J2203/062Diamond
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2203/00Processes utilising sub- or super atmospheric pressure
    • B01J2203/06High pressure synthesis
    • B01J2203/065Composition of the material produced
    • B01J2203/0655Diamond
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2203/00Processes utilising sub- or super atmospheric pressure
    • B01J2203/06High pressure synthesis
    • B01J2203/065Composition of the material produced
    • B01J2203/066Boronitrides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2203/00Processes utilising sub- or super atmospheric pressure
    • B01J2203/06High pressure synthesis
    • B01J2203/0675Structural or physico-chemical features of the materials processed
    • B01J2203/0685Crystal sintering

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.
US3879901A 1970-06-24 1973-09-10 Metal-coated diamonds in a metal alloy matrix Expired - Lifetime US3879901A (en)

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ZA7004347 1970-06-24
US15310571 true 1971-06-14 1971-06-14
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Cited By (36)

* Cited by examiner, † Cited by third party
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 A method of bonding a diamond or cubic boron nitride compacts
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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239321A (en) * 1960-07-22 1966-03-08 Adamant Res Lab Diamond abrasive particles in a metal matrix
US3306720A (en) * 1964-05-28 1967-02-28 Gen Electric Method for the production of diamond compact abrasives
US3316073A (en) * 1961-08-02 1967-04-25 Norton Co Process for making metal bonded diamond tools employing spherical pellets of metallic powder-coated diamond grits
US3351543A (en) * 1964-05-28 1967-11-07 Gen Electric Process of coating diamond with an adherent metal coating using cathode sputtering
US3356473A (en) * 1964-05-28 1967-12-05 Gen Electric Metal-bonded diamond abrasive body
US3464804A (en) * 1967-01-31 1969-09-02 Takeo Kagitani Method of chemically bonding carbon-titanium alloy to a diamond surface
US3650714A (en) * 1969-03-04 1972-03-21 Permattach Diamond Tool Corp A method of coating diamond particles with metal

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239321A (en) * 1960-07-22 1966-03-08 Adamant Res Lab Diamond abrasive particles in a metal matrix
US3316073A (en) * 1961-08-02 1967-04-25 Norton Co Process for making metal bonded diamond tools employing spherical pellets of metallic powder-coated diamond grits
US3306720A (en) * 1964-05-28 1967-02-28 Gen Electric Method for the production of diamond compact abrasives
US3351543A (en) * 1964-05-28 1967-11-07 Gen Electric Process of coating diamond with an adherent metal coating using cathode sputtering
US3356473A (en) * 1964-05-28 1967-12-05 Gen Electric Metal-bonded diamond abrasive body
US3464804A (en) * 1967-01-31 1969-09-02 Takeo Kagitani Method of chemically bonding carbon-titanium alloy to a diamond surface
US3650714A (en) * 1969-03-04 1972-03-21 Permattach Diamond Tool Corp A method of coating diamond particles with metal

Cited By (41)

* Cited by examiner, † Cited by third party
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 A method of bonding a diamond or cubic boron nitride compacts
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
US5151107A (en) * 1988-07-29 1992-09-29 Norton Company Cemented and cemented/sintered superabrasive polycrystalline bodies and methods of manufacture thereof
US5011514A (en) * 1988-07-29 1991-04-30 Norton Company Cemented and cemented/sintered superabrasive polycrystalline bodies and methods of manufacture thereof
US5024680A (en) * 1988-11-07 1991-06-18 Norton Company Multiple metal coated superabrasive grit and methods for their manufacture
US4951427A (en) * 1989-05-30 1990-08-28 General Electric Company Refractory metal oxide coated abrasives and grinding wheels made therefrom
US5104422A (en) * 1989-05-30 1992-04-14 General Electric Company Refractory metal oxide coated abrasives and grinding wheels made therefrom
US5096465A (en) * 1989-12-13 1992-03-17 Norton Company Diamond metal composite cutter and method for making same
US5224969A (en) * 1990-07-20 1993-07-06 Norton Company Diamond having multiple coatings and methods for their manufacture
EP0503974A1 (en) * 1991-03-14 1992-09-16 General Electric Company Multigrain abrasive particles
US5308367A (en) * 1991-06-13 1994-05-03 Julien D Lynn Titanium-nitride and titanium-carbide coated grinding tools and method therefor
US5681653A (en) * 1995-05-11 1997-10-28 Si Diamond Technology, Inc. Diamond cutting tools
US5731079A (en) * 1995-05-11 1998-03-24 Si Diamond Technology, Inc. Diamond cutting tools
US5588975A (en) * 1995-05-25 1996-12-31 Si Diamond Technology, Inc. Coated grinding tool
US6641918B1 (en) 1999-06-03 2003-11-04 Powdermet, Inc. Method of producing fine coated tungsten carbide particles
US6447569B1 (en) * 1999-07-14 2002-09-10 Kimiko Sueta Diamond containing edge material
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
US8602132B2 (en) 2006-06-16 2013-12-10 Us Synthetic Corporation Superabrasive materials and methods of manufacture
US8316969B1 (en) 2006-06-16 2012-11-27 Us Synthetic Corporation Superabrasive materials and methods of manufacture
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
US8151911B1 (en) 2008-02-15 2012-04-10 Us Synthetic Corporation Polycrystalline diamond compact, methods of fabricating same, and rotary drill bit using same
US8448727B1 (en) 2008-02-15 2013-05-28 Us Synthetic Corporation Rotary drill bit employing polycrystalline diamond cutting elements

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