航空学报 > 2012, Vol. 33 Issue (2): 369-374   doi: CNKI:11-1929/V.20111202.1032.006

热障涂层残余应力的拉曼光谱测量及数值分析

韩志勇, 张华, 王志平   

  1. 中国民航大学 天津市民用航空器适航与维修重点实验室, 天津 300300
  • 收稿日期:2011-10-12 修回日期:2011-11-03 出版日期:2012-02-25 发布日期:2012-02-24
  • 通讯作者: 韩志勇 E-mail:zyhan@cauc.edu.cn
  • 作者简介:韩志勇 男,博士,副教授,硕士生导师.主要研究方向:涂层材料制备与计算. Tel: 022-24092518 E-mail: zyhan@cauc.edu.cn
    张华 女,硕士研究生.主要研究方向:热障涂层制备与应力计算. Tel: 022-24092518 E-mail: huazhangcauc@126.com
    王志平 男,博士,教授,硕士生导师.主要研究方向:热喷涂和焊接技术. Tel: 022-24092518 E-mail: zpwang@cauc.edu.cn
  • 基金资助:

    国家自然科学基金(60879018)

Study of Residual Stress of Thermal Barrier Coatings by Raman Spectroscopy and Numerical Analysis

HAN Zhiyong, ZHANG Hua, WANG Zhiping   

  1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China
  • Received:2011-10-12 Revised:2011-11-03 Online:2012-02-25 Published:2012-02-24

摘要: 为了研究航空发动机热障涂层(TBCs)制备过程中残余应力的分布问题,采用大气等离子喷涂技术(APS)在镍基高温合金GH99上制备了热障涂层(CoCrAlY粘结层和ZrO2陶瓷面层),对热障涂层进行了100~3 500 cm-1激光拉曼光谱扫描,并采用有限元方法计算了与之对应的热障涂层有限元模型应力分布.分析了涂层系统内部轴向残余应力的分布情况并对比分析了激光拉曼光谱频移及有限元计算结果.激光拉曼分析结果表明:轴向陶瓷层内部呈现压应力,在陶瓷层/粘结层界面处应力达到最大值14.8 MPa,粘结层内呈现拉应力;数值分析应力变化趋势与激光拉曼测试分析结果相吻合.

关键词: 热障涂层, 拉曼光谱, 拉曼频移, 数值模拟, 残余应力

Abstract: Residual stress of thermal barrier coatings (TBCs) is investigated by experiment and numerical method. Thermal barrier coatings, which consist of CoCrAlY bond coating (BC) and ZrO2 thermat ceramic coating (TCC) are fabricated on the GH99 superalloy by air plasma spray (APS). Meanwhile, residual stress in TBCs during the cooling process is measured by 100-3 500 cm-1 Raman spectroscopy and simulated using finite element method (FEM). The distributions of vertical stresses are analyzed; meanwhile, the results of Raman shift and numerical simulation are compared. The results show that in the vertical direction, there appears compressive stress in TCC, and to the interface of TCC/BC there shows the maximum compressive stress, 14.8 MPa. There appears tensile stress in BC. The results of the simulation are consistent with experimental measurements obtained with micro-Raman spectroscopy.

Key words: thermal barrier coatings, Raman spectroscopy, Raman shift, finite elment method, residual stress

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