Nitride Ceramics Containing a-BN

BN itself is not considered to be a useful sintering additive, since no liquid phase is formed between AIN and BN below the sintering temperature of AIN [92]. Like AIN and BN, the 

The structure of a chemical-vapor-deposited SigN BN composite has been investigated by neutron scattering. There are voids of about 10 A diameter in the amorphous Si3N4 occupied by turbostratic boron nitride [136]. The conversion of a-Si3N4 to the (3 phase is inhibited by the addition of nitrides such as a-BN. 

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