Patent ID: 8814965
Filing Date: 2014-08-26
Classification: C04B

Abstract:
1. A cubic boron nitride sintered body which comprises about 30 to about 70% by volume of cubic boron nitride; and as the reminder, a binder phase comprising at least one selected from an oxide, carbide, nitride and boride of Ti, Al, Zr, Y, Ce, Mg or Ca and mutual solid solutions thereof; and inevitable impurities, the cubic boron nitride sintered body contains α-type Al when an X-ray diffraction intensity of a (110) plane of α-type Al (Izb/Ia) which shows a ratio of Izb based on Ia satisfies 0.13≦(Izb/Ia)≦0.30, and (Izo/Ia) which shows a ratio of Izo based on Ia satisfies 0.05≦(Izo/Ia)≦0.20.