| 热循环下热障涂层中的残余应力场预测 |
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| 引用本文： | 毛卫国,周益春. 热循环下热障涂层中的残余应力场预测[J]. 湘潭大学自然科学学报, 2003, 25(3): 39-47 |
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| 作者姓名： | 毛卫国 周益春 |
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| 作者单位： | 1. 湘潭大学材料与光电物理学院,湖南,湘潭,411105
2. 湘潭大学材料与光电物理学院,湖南,湘潭,411105;湘潭大学基础力学与材料工程研究所,湖南,湘潭,411105 |
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| 基金项目： | 教育部跨世纪人才基金(教技函2000[48])，湖南省青年基金(01JJY2101) |
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| 摘 要： | 建立了适应于热循环中热应力场的理论模型。分析了热障涂层内的热应力分布场。并计算出一个循环后热障涂层内的残余应力分布。由此可推算经过N次循环后热障涂层中总残余应力值。以达到预测热障涂层寿命的目的。
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| 关 键 词： | 热障涂层 热应力 残余应力 热循环 |
| 文章编号： | 1000-5900(2003)03-0039-09 |
| 修稿时间： | 2003-06-16 |
Prediction of residual stress in thermal barrier coating under thermal cycles |
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| . MAO Wei - guo,ZHOU Yi - chun. Prediction of residual stress in thermal barrier coating under thermal cycles[J]. Natural Science Journal of Xiangtan University, 2003, 25(3): 39-47 |
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| Authors: | . MAO Wei - guo ZHOU Yi - chun |
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| Abstract: | In this paper, the thermal stress fields in thermal barrier coating has been analyzed for a thermal cycle. The residual stress distribution in thermal barrier coating afler a thermal cycle were calculated. The residual stress in ihennal barrier coaling afler many thermal cycles could also be oblained. It is found that the residual stress was compres-sive for the thermal barrier ceramic coaling in the cooling period. The compressive residual stress was due to the creep ef-fect in the ceramic coating. This residual stress would deduce the buckling of the coaling and therefore, the buckling would resull in the spallalion of the ceramic coaling. By the results, the critical residual compressive slress, which results in the buckling appearance of TBCs, would be known. |
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| Keywords: | thermal barrier coating thermal stress residual stress thermal cycle |
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