SiC-AlN系複合セラミックスの熱機械的性質に及ぼす原料粉末の混合時間の影響

概要

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It is well-known that solid solutions can be formed in SiC-AIN system over a wide range of composition. The formation of the solid solution during sintering is, however, not sufficient in usual elemental powder mixtures due to their low diffusion coefficients. In the present study, SiC-A1N powder mixtures were prepared by ball-milling for 1 to 300h and subsequent HIPing at 2073 to 2173K for 2h. The formation of solid solutions was found to be enhanced in fine-mixed powder mixture. Variation of the thermal and mechanical properties for the HIPed compacts was found to depend on the ball-milling time. When the ball-milling time was prolonged up to 100h, almost homogeneous solid solution was formed, and the intrinsic properties to the SiC-AIN solid solutions were obtained.
社団法人粉体粉末冶金協会の論文