Cr₂(C, N)-ZrO₂系組成物の焼結

抄録

Cr₂(C, N) was obtained by heating Cr metal powder in a mixed gas of CO and N₂. This compound is useful for high temperature structural and heat element materials since it is high melting and electronic conductive. This compound, however, is easily oxidized in an atmosphere containing oxygen at high temperatures. The oxidation resistance is enhanced by forming a densely sintered Cr₂(C, N)-ZrO₂ body. This paper described a fundamental for the development of composites in the system Cr₂(C, N)-ZrO₂. The dense Cr₂(C, N)-ZrO₂ body was obtained by heating mixtures of Cr and ZrO₂ in a gas mixture of CO and N₂ at 1500°C. For example, a dense Cr₂(C, N)-ZrO₂ body with relative density of 95% was obtained from a (60wt% Cr-40wt% ZrO₂) compact by sintering in a gas with p_co of 0.2atm and p_N2 of 0.8atm at 1500°C.