摘要
用云纹干涉法研究了带直通切口的ＣｅＴＺＰ（ＴｅｔｒａｇｏｎａｌＺｉｒｃｏｎｉａＰｏｌｙｃｒｙｓｔａｌ）和ＣｅＴＺＰ／Ａｌ２Ｏ３层状复合材料三点弯曲梁的相变过程．实验发现１６００°Ｃ／３ｈ烧结１２％ｍｏｌＣｅＯ２稳定的ＣｅＴＺＰ在室温下就具有强烈的自催化效应，直通切口前缘的相变区呈树枝状，ＣｅＴＺＰ／Ａｌ２Ｏ３层状复合材料的自催化相变被Ａｌ２Ｏ３层抑制，切口前缘的相变区变短，且相变区的覆盖面积减小．文中最后对Ａｌ２Ｏ３层改变ＣｅＴＺＰ相变区及力学性能的原因进行了讨论．
The real time transformation procedures of three point bending beams with a single edge notch of Ce TZP and Ce TZP/Al 2O 3 layered microcomposites are observed by moire interferometry. Strong autocatalytic effect on Ce TZP stabilized with 12% mol CeO 2 and sintered at 1600°C for 3 h is revealed under room temperature, and the frontal transformation zone appears to beroot like. While the autocatalytic transformation is prevented byAl 2O 3 layers in Ce TZP/Al 2O 3 layered microcomposites, the frontal transformation zone is truncated transformation band and the zone is greatly decreased. A brief discuss about the reason why the transformation zone and mechanical properties of Ce TZP are changed by Al 2O 3 layers is given.
出处
《力学学报》
EI
CSCD
北大核心
1997年第5期555-562,共8页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
天津市21世纪青年科学基金
关键词
CE-TZP
层状
复合材料
自催化相变
增韧
裂纹尖
Ce TZP, Ce TZP/Al 2O 3 layered microcomposites, autocatalytic transformation, toughening, moire interferometry
