X-RAY-EMISSION SPECTRA AND STRUCTURAL MODELS OF BCN MATERIALS

The results of measurements of BKalpha, NKalpha and CKalpha (ultra-sof t X-ray emission spectra of boron carbonitride phases synthesized by n itridation of boron carbide at 1200, 1800 and 24 000 degrees C) are pr esented. The obtained results are compared with spectra of reference c ompounds (a-B, B4C, BN and graphite). It was found that BKalpha and NK alpha spectra of carbonitride phases were identical to that of BN. On the other hand, CKalpha spectra of the BCN system were very similar to that of graphite. No trace of B-C chemical bonding was found for BCN compounds. The obtained results confirm the structural model of the te rnary compound according to which separate boron nitride and graphite layers are in random intercalation.