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材料工程  2012 

钛/瓷连接界面残余应力有限元分析

, PP. 45-49

Keywords: ,陶瓷,残余应力,有限元,中间层

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Abstract:

采用有限元法分析了钛/瓷、钛/ZrO2/瓷连接冷却过程中界面残余应力形成的大小和分布特征。结果表明,钛/瓷试样在结合界面处存在较大的残余应力。在平行于界面的方向上,陶瓷表面受拉应力的作用,易导致表面裂纹的产生。钛/瓷界面的边缘处存在较大的应力集中,尤其是结合界面位于Z向棱边的顶角处,应力集中较为明显,易导致瓷崩和瓷裂。ZrO2中间层可抑制钛表面过度氧化,缓和钛/瓷界面应力集中,提高钛/瓷结合强度,降低陶瓷层裂纹倾向。

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