Abstract
New tungsten mono-carbonitride W(C, N) powder had already been found by the authors to be synthesized by the following two processes: (1) heating of W+C mixed powder in high-pressure N2gas of 10-160 MPa at 1523-1773 K and (2) heating of W powder in CH4+NH3 mixed gas of normal-pressure at 1373-1573 K. In this study, the synthesis of Mo(C, N) was tried by the latter normal-pressure process, i.e., by heating Mo + C mixed powder in NH3 gas (method I) and by heating Mo powder in CH4+NH3 mixed gas (method II). It was found that Mo(C, N) with nitrogen content of 17 at% could be synthesized by method II, at 33-67 NH3 vol% in the mixed gas. The nitrogen content was much larger than the 5 at% of W(C, N) by method II and it was within 14-25 at% which are the nitrogen contents of Mo(C, N) synthesized by the high-pressure-N2 process.
