Patent ID: 6635593
Filing Date: 2003-10-21
Classification: C04B,Y10T

Abstract:
A highly crater-resistant high-strength sintered material comprising from 50% to 78% by volume of high-pressure phase-type boron nitride and the balance of a binder phase,wherein said binder phase comprises at least one component selected from the group consisting of nitride, carbide, carbonitride and boride of Ti, nitride, boride and oxide of Al, carbide and boride of W, nitride, carbide, carbontride and boride of Co, carbide and boride of Ni, and mutual solid solutions thereof; said binder phase is continuous in a sintered material texture; a total weight of Al, W, Co and Ni which are present as compounds in the sintered material is from 3% to 20% by weight based on the sintered material; and a weight of of W, Co and Ni which are present as compounds in the sintered material is from 1% to 10% based on the sintered material; and a weight ratio of W, Co and Ni in such that [W/(W+Co+Ni)] is within a range from 0.2 to 0.6 and [Co/(Co+Ni)] is within a range from 0.6 to 0.95.