文献类型：期刊文献

英文题名：Effect of Dimensions of Non-bonded Lamellar Interfaces on the Stress Distribution in APS-TBCs

作者：Yu, Z. X.[1];Wang, W. Z.[1];Wang, H. H.[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Safety Sci Pressurized Syst, Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：23

期号：8

起止页码：1436

外文期刊名：JOURNAL OF THERMAL SPRAY TECHNOLOGY

收录：;EI(收录号：20144200096522);WOS:【SCI-EXPANDED(收录号:WOS:000345394800021)】；

基金：The authors gratefully appreciate the support of National Natural Science Foundation (No. 51275172) and National Basic Research Program of China (No. 2012CB625100).

语种：英文

外文关键词：non-bonded lamellar interface; stress; thermal barrier coatings; thermal cycle; yttria stabilized zirconia (YSZ)

摘要：Cracking behavior has been considered for the top coating in the thermal barrier coating system. The effect of the dimension and position of non-bonded lamellar interfaces on the stress distribution is investigated by the simulation method. Plasma-sprayed yttria-stabilized zirconia coatings are deposited at different spraying distances. The crack propagation behavior is studied by statistical analysis after the coatings have experienced different thermal cycles. The simulation results reveal that the normal stresses at the tips of non-bonded lamellar interfaces increase with the increment of the length of interfaces and with the decrease of the distance between them. The stress level almost stays the same with the changing of lamellar thickness. Experimental results indicate the correctness of the simulation. It is found that the length of non-bonded lamellar interfaces in the as-deposited coatings shows an increasing tendency with the spraying distance. The total crack length of coatings increases with the number of thermal cycles and the spraying distance after thermal cycling tests.