CBN-metal/metal nitride composites

Theoretical and experimental studies of cubic BN mixed with various metals and metal nitrides in the molar ratio 1:1 and 2.1 are reported. Theoretical calculations show that all investigated phases react with cubic BN forming new phases at 1400 and 1627 degrees C, Experimental cBN-phase composites w ere prepared by high pressure hot pressing. Additionally, studies of the ph ase composition, morphology as well as of the mechanical properties of the superhard materials obtained have been carried out. Of all materials studie d, composites containing a titanium binding phase show the best mechanical properties. (C) 2000 Elsevier Science Ltd and Techna S.r.l. All rights rese rved.