Re-sintered boron-rich polycrystalline cubic boron nitride and m

Details Re-sintered boron-rich polycrystalline cubic boron nitride and m Re-sintered boron-rich polycrystalline cubic boron nitride and m

1986-01-29

1987-06-16

Lieberman, Paul

Abrasive tool making process, material, or composition

Miscellaneous

51307, B24D 300

Patent

active

046734147

ABSTRACT:
Disclosed is a method for making re-sintered polycrystalline CBN compact which comprises placing sintered boron-rich polycrystalline CBN particles in a high temperature/high pressure apparatus and subjecting said boron-rich CBN particles to a pressure and a temperature adequate to re-sinter said particles, the temperature being below the reconversion temperature of CBN, for a time sufficient to re-sinter the polycrystalline CBN particles therein. The boron-rich polycrystalline CBN particles in the HP/HT apparatus contain no impurity which would interfere with the sintering process (CBN sintering inhibiting impurities) and no sintering aid material.

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patent: 4289503 (1981-09-01), Corrigan

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