ファイバー分散 ZrO_2 の焼結挙動の機械的特性及び温度落差600K での耐熱衝撃性への影響

概要

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Thermal shock resistant zirconia ceramics reinforced with zirconia fibers have been developed. Zirconia ceramics with 12wt% fiber having an average length of 2.5 or 0.2mm and without fibers were studied. Sintered bodies with different bulk densities were obtained by firing in air at temperatures between 1250 and 1650°C. Dispersed ZrO2 fibers remarkably improved the thermal shock resistance of the ZrO2 ceramics. The bending strength and thermal shock resistance of the samples in which ZrO2 fibers were spheroidized by diffusion during sintering decreased, even though they had high densities. The bending strength did not change after water quenching from 625 to 25°C for the zirconia ceramics reinforced with long fibers.
社団法人日本セラミックス協会の論文
1993-12-01