A new boron nitride phase diagram and chemical interaction in the B-N system at high pressures

Abstract

The analysis of the experimental data on the interaction of boron and its compounds with ammonia, nitrogen and hydrazine at 0.5–8.0 GPa and 600 to 1600 K was carried out in the frame of the new conception of phase p, T-diagram for the boron nitride. The results obtained show that in the E-N system an alternative metastable behavior of the forming boron nitride is observed in a wide p,T-range. And a considerable amount of the data obtained cannot be explained on the basis of the generally accepted view on the EN polymorphism.

Key Words:

• boron nitride
• phase diagram
• chemical interaction