Thermal shock fatigue behavior of TiC/Al2O3 composite ceramics
来源期刊：Rare Metals2008年第3期
论文作者：SI Tingzhi~a LIU Ning~b ZHANG Qing’an~a YOU Xianqing~b ~a School of Materials Science and Engineering,Anhui University,of Technology,Ma’anshan ,China ~b School of Materials Science and Engineering,Hefei University of Technology Hefei ,China
文章页码：308 - 314
摘 要：<正>The thermal shock fatigue behaviors of pure hot-pressed alumina and 30 wt.% TiC/Al2O3 composites were studied.The effect of TiC and Al2O3 starting particle size on the mechanical properties of the composites was discussed.Indentation-quench test was conducted to evaluate the effect of thermal fatigue temperature difference（ΔT）and number of thermal cycles（N）on fatigue crack growth（Δa）.The mechanical properties and thermal fatigue resistance of TiC/Al2O3 composites are remarkably improved by the addition of TiC.The thermal shock fa- tigue of monolithic alumina and TiC/Al2O3 composites is due to a"true"cycling effect（thermal fatigue）.Crack deflection and bridging are the predominant reasons for the improvement of thermal shock fatigue resistance of the composites.
摘要：<正>The thermal shock fatigue behaviors of pure hot-pressed alumina and 30 wt.% TiC/Al2O3 composites were studied.The effect of TiC and Al2O3 starting particle size on the mechanical properties of the composites was discussed.Indentation-quench test was conducted to evaluate the effect of thermal fatigue temperature difference（ΔT）and number of thermal cycles（N）on fatigue crack growth（Δa）.The mechanical properties and thermal fatigue resistance of TiC/Al2O3 composites are remarkably improved by the addition of TiC.The thermal shock fa- tigue of monolithic alumina and TiC/Al2O3 composites is due to a"true"cycling effect（thermal fatigue）.Crack deflection and bridging are the predominant reasons for the improvement of thermal shock fatigue resistance of the composites.
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