陶瓷层孔隙对热障涂层TGO界面残余应力影响的有限元研究
Finite Element Study of the Influence of Ceramic Layer Porosity on Interfacial Residual Stress of Thermal Barrier Coatings TGO
摘 要
作为一种热障涂层不可避免的结构缺陷，孔隙的存在具有随机性，其分布位置会给TGO（热生长氧化层）界面残余应力带来巨大影响。为了更好地了解孔隙率对热障涂层TGO界面残余应力的影响，考虑单个孔隙对TGO界面残余应力的影响，通过改变孔隙与TGO界面的距离、孔隙位置及孔隙的尺寸，来分析TGO界面残余应力的变化情况。结果表明：当半径为5μm的圆形孔隙与TGO/TC界面距离为35μm时，孔隙几乎对TGO界面残余应力没有影响，孔隙离界面越近，对残余应力的大小及分布影响越大；距离一定时，孔隙尺寸越小对界面残余应力的影响越小。
孔隙率
热生长氧化层
thermal barrier coating
porosity
thermal growth oxidation (TGO)
Abstract
As an inevitable structural defect of thermal barrier coatings, the existence of pores is random and its distribution position has great influence on the residual stress of thermal growth oxidation (TGO) interface. In order to better understand the effect of porosity on the interfacial stress of TGO in thermal barrier coating, the effect of single pore on the residual stress of the TGO interface was considered, the variation of residual stress at TGO interface was analyzed by changing the distance between pores and TGO interface, the pore location and pore size. The results showed that when the radius of the circular pore was 5um and the distance from the TGO/TBC interface was 35um, the porosity was shown almost no influence on the residual stress in the TGO interface, and the closer the pore to the interface, the greater the influence of the residual stress on the size and distribution. When the distance was fixed, the smaller the pore size was, the smaller the interfacial residual stress would be.
中图分类号 TG148 TG115.28 DOI 10.11973/wsjc201908007
所属栏目 应力无损测试技术专题
基金项目 国家自然科学基金项目（51675103）；机械系统与振动国家重点实验室开放课题基金（MSV-2018-07）；上海市自然科学基金项目（18ZR1414200）；福建省质量技术监督局科技计划项目（FJQI2014008）
收稿日期 2018/8/7
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备注戴晨煜(1995-),男,硕士研究生,主要研究方向为热障涂层残余应力与失效分析
引用该论文: DAI Chenyu,ZHONG Shuncong,FU Xibin,HUANG Xuebin. Finite Element Study of the Influence of Ceramic Layer Porosity on Interfacial Residual Stress of Thermal Barrier Coatings TGO[J]. Nondestructive Testing, 2019, 41(8): 30～35
戴晨煜,钟舜聪,伏喜斌,黄学斌. 陶瓷层孔隙对热障涂层TGO界面残余应力影响的有限元研究[J]. 无损检测, 2019, 41(8): 30～35
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【4】郭双全, 冯云彪, 付俊波,等. 高性能纳米氧化锆热障涂层性能研究[J]. 表面技术, 2012, 41(6):14-17.
【5】KULKARNI A, VAIDYA A, GOLAND A, et al. Processing effects on porosity-property correlations in plasma sprayed yttria-stabilized zirconia coatings[J]. Materials Science & Engineering A, 2003, 359(1):100-111.
【6】FRⅡS M, PERSSON C, WIGREN J. Influence of particle in-flight characteristics on the microstructure of atmospheric plasma sprayed yttria stabilized ZrO2[J]. Surface & Coatings Technology, 2001, 141(2):115-127.
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【8】EVANS A G, MUMM D R, HUTCHINSON J W, et al. Mechanisms controlling the durability of thermal barrier coatings[J]. Progress in Materials Science, 2001, 46(5):505-553.
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【11】刘保福, 詹肇麟, 张红松,等. 等离子喷涂ZrO2热障涂层孔隙结构的研究[J]. 金属热处理, 2007, 32(12):96-99.
【12】张红松, 王富耻, 马壮,等. 等离子喷涂ZrO2涂层孔隙定量分析[J]. 材料工程, 2006(增1):407-410.
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