Coherent phase transformations as a basis for production of highly textured polycrystals of boron nitride diamond-like phases

Abstract

Some properties of high-textured polycrystals (HTP) are similar to the properties of single crystals. So, the materials on the base of HTP can be used instead of monocrystalline materials. Such replacement is especially actual for those crystalline materials the obtaining of which in the monocrystalline state is a problem. Cubic boron nitride (cBN) is one of such material. In present paper the method of massive HTP of cubic and wurtzitic BN obtaining is discussed. This method is based on the realization of coherent phase transformations in the CVD plates of graphite-like boron nitride under high pressures and temperaturesTranslated from Russian (Proceedings of Advanced Materials '99; Institute of Materials Science Problems, Nat. Acad. Sci. Ukraine, KievAvailable from British Library Document Supply Centre-DSC:9023.190(10101)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo