Al_2O_3-ZrO_2陶瓷的动态疲劳特性研究

Research of Dynamic Fatigue Behavior of Al_(2)O_3-ZrO_2 Ceramics

本文研究了三种 Al_2O_3-ZrO_2陶瓷的动态疲劳特性,评价了它们对疲劳慢裂纹扩展的抗力,讨论了有关的影响因素,并比较系统地分析了表面残余压应力及裂纹尖端相变诱生残余压应力可延缓疲劳裂纹扩展的有利作用。

The dynamic fatigue behavior was studied for Al_2O_3-ZrO_2 ceramics,and the re-sistance of their slow crack growth was evaluated at room temperature,and the eff-ective factors on slow crack growth of ceramics,were researched.At same time,theeffects of surface residual compressive stress and phase transformation induced resid-ual compressive stress at crack tip were systematically studied on the resistance ofslow crack growth.