热障涂层应力与失效机理若干关键问题的研究进展与评述

被引：17

作者：

韩萌

黄继华

陈树海

机构：

[1] 北京科技大学材料工程与科学学院

来源：

航空材料学报 | 2013年 / 33卷 / 05期

关键词：

热障涂层; 应力; 失效; 数值模拟; 热生长氧化物;

D O I：

暂无

中图分类号：

TG174.44 [金属复层保护];

学科分类号：

摘要：

综述了热障涂层应力数值模拟类研究的现状。在此基础上,总结归纳了数值模拟类研究的三个关键性问题:热生长氧化物、材料非线性特性、涂层应力状态与失效机理的内在联系。分别探讨了热生长氧化物的生成对于涂层系统内部应力以及失效模式的影响;涂层蠕变特性对于涂层系统内应力的缓解机制;对比分析了APS/EB-PVD两种不同制备方法所制备的热障涂层的失效模式,总结归纳了涂层系统应力状态与其失效机理的内在联系。最后,探讨了当前传统8YSZ热障涂层的发展瓶颈,明确了未来热障涂层的发展将落在探索新型低热导率隔热材料、探索合理的热障涂层体系两个方面。着重介绍了新型双陶瓷层热障涂层,总结了双陶瓷层热障涂层几个重要的研究问题。对于研究新型热障涂层的应力状态及其失效行为、优化涂层结构,有限元数值模拟仍是一种重要的研究手段。

引用

页码：83 / 98

页数：16

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