摘要
在热障涂层系统制备工艺冷却过程中,各层材料参数不匹配(如弹性模量、泊松比、热膨胀系数、热传导参数等)将导致其体内各层材料冷却速率不一样,同时在各层界面上热障涂层系统为了保持应变协调和位移连续,最终在冷却后热障涂层系统各层内均存在热残余应力.通过建立相应的理论模型得到了热障涂层系统各层热残余应力的解析解表达式.通过计算分析,得到了冷却方式和陶瓷喷涂厚度对各层残余应力的影响.最终希望得到一组最优化工艺参数来指导热障涂层制备工艺和生产.
The material parameters （such as Young＇s modulus, Poisson＇s ratio and thermal expansion coefficient） of each layer will result in the different cooling veloelty of thermal barrier coatings （TBCs） system during the deposition process. Moreover, to satisfy the condition of strain compatibility at the free boundaries, residual stresses in TBCs occur after cooling to the ambient. In this paper, the analytical solution has been obtained by using a theoretical model. We have obtained the effect of cooling kinds and the thickness of ceramic coating on the magnitude of residual stress in TBCs. Finally, we will use a group of optimize parameters to control the deposition technology of TBCs.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2005年第4期46-52,共7页
Natural Science Journal of Xiangtan University
基金
湖南省教育厅资助项目(05C096)
湘潭大学"先进材料及其流变特性教育部重点实验室"开放研究基金资助项目(KF0503)
关键词
热障涂层
残余应力
thermal barrier coating
residual stress
