残余热应力对Al2O3/Ni金属陶瓷断裂行为和力学性能的影响

1.北京航空材料研究院,北京,100095

2.北京航空材料研究院,北京,100095

3.中国科学院上海硅酸盐研究所,上海,200050

4.中国科学院上海硅酸盐研究所,上海,200050

Effect of Residual Thermal Stresses on Fracture Behavior and Mechanical Properties of Al2O3/Ni Cermets

运用残余热应力理论定性地解释了残余热应力对Al2O3/Ni金属陶瓷断裂行为和力学性能的影响.Ni颗粒位于Al2O3晶内或Ni含量低时,在Al2O3-Al2O3晶界产生张应力,易发生沿晶断裂;而其位于Al2O3晶界或Ni含量高时,在Al2O3-Al2O3晶界产生压应力,易产生穿晶断裂.

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