Diamond and cubic boron nitride

Claim 2

An article comprising a support mass having abrasive masses bonded to at least each of the upper and lower surfaces of said support mass.

Claim 3

An article as set forth in claim 1 wherein said abrasive masses are selected from the group consisting of diamond and cubic boron nitride.

Claim 4

An article as set forth in claims 1 or 2 wherein said support mass is a carbide.

Claim 5

An article as set forth in claim 3 wherein said carbide is selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and mixtures thereof.

Claim 6

An article as set forth in claim 4 wherein said carbide is tungsten carbide containing a minor amount of cobalt.

Claim 7

An article as set forth in claim 2 wherein there is a transition layer between the support mass and at least one of the abrasive masses.

Claim 8

An article as set forth in claim 2 further comprising an intermediate mass disposed between said support mass and at least one of the abrasive masses.

Claim 9

An article as set forth in claims 6 or 7 wherein said support mass is a carbide.

Claim 10

An article as set forth in claim 3 wherein said support mass has a thickness of from about 0.060 inch to about 0.125 inch.

Claim 11

An article comprising a support mass selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and mixtures thereof, said support mass having abrasive masses selected from the group consisting of diamond and cubic boron nitride bonded to at least each of the upper and lower surfaces thereof.

Claim 12

An article comprising a support mass selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and mixtures thereof, said support mass having abrasive masses selected from the group consisting of diamond and cubic boron nitride bonded to at least each of the upper and lower surfaces thereof.

Claim 13

An article as set forth in claim 10 wherein said abrasive masses are brazed to said support mass.

Claim 14

A process for making abrasive articles, comprising: (a) placing within an enclosure a quantity of abrasive particles and a quantity of support material in a manner such that the abrasive particles will become bonded to at least the upper and lower surfaces of said support material; (b) simultaneously heating and applying pressure to said enclosure in an amount effective to form a unified mass; (c) ceasing the input of heat to said enclosure; (d) ceasing the application of pressure to said enclosure; and (e) recovering the unified mass produced.

Claim 15

A process for making abrasive articles, comprising: (a) placing within an enclosure a quantity of abrasive particles and a quantity of support material in a manner such that the abrasive particles will become bonded to at least the upper and lower surfaces of said support material; (b) simultaneously heating and applying pressure to said enclosure in an amount effective to form a unified mass; (c) ceasing the input of heat to said enclosure; (d) ceasing the application of pressure to said enclosure; and (e) recovering the unified mass produced.

Claim 16

A process as set forth in claim 12 wherein the support material placed in said enclosure in step (a) is in powdered form.

Claim 17

A process as set forth in claim 12 wherein the support material placed in said enclosure in step (a) is a pre-sintered carbide.

Claim 18

A process as set forth in claim 12 wherein the temperature employed in step (b) is from about 1200° C. to about 2000° C.

Claim 19

A process as set forth in claim 12 wherein the pressure employed in step (b) is at least about 40 kilobars.

Claim 20

A process as set forth in claim 12 wherein the abrasive particles are selected from the group consisting of diamond and cubic boron nitride.

Claim 21

A process as set forth in claim 17 wherein the support material is selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and mixtures thereof.

Claim 22

A process as set forth in claim 12 further comprising placing an intermediate layer between the support material and at least one of the masses of abrasive particles.

Claim 23

A process for making abrasive articles, comprising: (a) placing within an enclosure a quantity of abrasive particles selected from the group consisting of diamond and cubic boron nitride and a quantity of support material in a manner such that the abrasive particles will become bonded to at least the upper and lower surfaces of said support material; (b) simultaneously heating said enclosure to a temperature of from about 1200° C. to about 2000° C. and applying pressure of at least about 40 kilobars to said enclosure so as to form a unified mass of support material and abrasive particles; (c) ceasing the input of heat to said enclosure; (d) ceasing the application of pressure to said enclosure when the temperature is below about 700° C.; and (e) recovering the unified mass produced.

Claim 24

A process for making abrasive articles, comprising: (a) placing within an enclosure a quantity of abrasive particles selected from the group consisting of diamond and cubic boron nitride and a quantity of support material in a manner such that the abrasive particles will become bonded to at least the upper and lower surfaces of said support material; (b) simultaneously heating said enclosure to a temperature of from about 1200° C. to about 2000° C. and applying pressure of at least about 40 kilobars to said enclosure so as to form a unified mass of support material and abrasive particles; (c) ceasing the input of heat to said enclosure; (d) ceasing the application of pressure to said enclosure when the temperature is below about 700° C.; and (e) recovering the unified mass produced.

Claim 25

A process for making abrasive articles, comprising brazing a unified mass of abrasive particles to at least the upper and lower surfaces of a support mass.

Claim 26

A process for making abrasive articles, comprising brazing a unified mass of abrasive particles to at least the upper and lower surfaces of a support mass.

Claim 27

A process as set forth in claim 21, wherein said unified mass of abrasive particles is selected from the group consisting of diamond and cubic boron nitride and said support mass is a carbide.

Claim 28

A process as set forth in claim 21, wherein said unified mass of abrasive particles is selected from the group consisting of diamond and cubic boron nitride bonded to a carbide mass.