Products and process for making multigrain abrasive compacts

Details Products and process for making multigrain abrasive compacts Products and process for making multigrain abrasive compacts

1991-03-14

1993-05-18

Bell, Mark L.

Abrasive tool making process, material, or composition

Miscellaneous

51295, 51309, B24D 300

Patent

active

052117260

ABSTRACT:
Multigrain abrasive compacts and processes for making the same are provided which comprise fine granules of cubic boron nitride or diamond bound by a sintered matrix derived from a coating on the granules. The coating comprises one or more layers of an active coating material which chemically bonds to the underlying surface. These compacts are obtained by coating fine granules of cubic boron nitride or diamond with the active coating material and sintering the coated particles with or without a powdered metal or alloy. The compacts can be obtained utilizing a short sintering step with relatively low pressures and temperatures. In certain embodiments, the use of high pressure, high temperature equipment can be voided. These compacts have improved breakdown characteristics due to the nature of the coated particles incorporated therein. The process provided is well suited for the use of diamond powder obtained from chemical vapor deposition processes.

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