等离子喷涂8YSZ热障涂层隔热效果及内应力演变有限元模拟  

Finite Element Simulation of Thermal Insulation Effect and Internal Stress Evolution of Plasma Sprayed 8YSZ Thermal Barrier Coating

作　　者：吴硕 赵远涛 王亮[3] 李文戈[1] 刘未来 张士陶 吴艳鹏 马融 WU Shuo;ZHAO Yuantao;WANG Liang;LI Wenge;LIU Weilai;ZHANG Shitao;WU Yanpeng;MA Rong(Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China;School of Navigation and Shipping,Shandong Jiaotong University,Weihai 264209,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Department of Boat,Non-Comissioned Officer Academy of PAP,Hangzhou 311400,China;Shanghai Rules&Research Institute,China Classification Society,Shanghai 200135,China)

机构地区：[1]上海海事大学商船学院,上海201306 [2]山东交通学院航运学院,威海264209 [3]中国科学院上海硅酸盐研究所,上海200050 [4]武警士官学校船艇系,杭州311400 [5]中国船级社上海规范研究所,上海200135

出　　处：《机械工程材料》2023年第9期94-100,105,共8页Materials For Mechanical Engineering

基　　金：工业和信息化部2018年绿色制造系统集成计划批准项目。

摘　　要：采用等离子喷涂法制备质量分数8%氧化钇稳定氧化锆(8YSZ)热障涂层,并进行隔热和热震循环试验;构建简易有限元模型对热障涂层的隔热性能和热震循环中的内应力演变进行模拟,并对破坏机理进行分析。结果表明:模拟得到热障涂层的隔热温度在167.60~262.22℃,隔热效果良好,与试验结果的相对误差在10%以内;热障涂层的隔热效果随厚度增加而增强;热震循环产生的应力在涂层的界面边缘处集中,与试验得到的在涂层边缘处出现裂纹和脱落并逐渐延伸至中心的失效方式相吻合;随涂层厚度增加,热震循环升温和降温后的应力增大。The 8wt% yttrium stabilized zirconia(8YSZ) thermal barrier coating was prepared by plasma spraying,and the thermal insulation and thermal shock cycle tests were carried out.A simple finite element model was constructed to simulate the thermal insulation performance and the internal stress evolution in thermal shock cycle,and the failure mechanism was analyzed.The results show that the thermal insulation temperature of the barrier coating by simulation was 167.60-262.22 ℃,indicating the thermal insulation effect was good,and the relative error between the simulation and the test result was less than 10%.The thermal insulation effect increased with increasing thickness.The stress generated by thermal shock cycles was concentrated at the edge of the coating interface,which was consistent with the failure mode obtained by experiments that cracks and fall off appeared at the coating edge and expanded to the core.With increasing thickness of the coating,the stress after heating and cooling of the thermal shock cycle increased.

关 键 词：热障涂层 有限元模拟 隔热效果 热震循环 应力分布 

分 类 号：U668.3[交通运输工程—船舶及航道工程]