Contribution of graphite-like boron nitride to the formation of residual stresses, strength, and performance of materials based on wurtzitic boron nitride

摘要

The paper deals with the mechanism of the formation of physico-mechanical properties of polycrystalline superhard materials based on wurtzitic boron nitride - Hexanite-A. We have studied the influence of graphite-like BN modification, which is present in Hexanite-A, on the residual stress level upon sintering, and analyzed the relationship between these stresses and the strength and performance of the polycrystalline superhard materials. The results of investigation of wBN-based material confirm the presence of residual stresses due to graphite-like boron nitride.