繰返し熱衝撃を受けたセラミックスの残留強度のばらつき

概要

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Residual strengths after repeated thermal shocks were studied using Al_2O_3 ceramics specimens. Thermal shocks were repeated by the water quench method under two temperature difference conditions less than the critical temperature difference ΔT_C at which the residual strength degradation was recognized after a single thermal shock. Residual strengths were significantly reduced by repetition of thermal shock and show wide scattering. After a relatively large thermal shock was repeated, the residual strentgth of the specimen showed a minimum value which was lower than that by single thermal shock. The results were discussed by means of the stable and the unstable crack growth behavior based on the thermal shock fracture theory proposed by Hasselman.
一般社団法人日本機械学会の論文
1992-02-25