Modeling Study on Stress Distribution as Effects of Temperatures and TGO Thickness in ScYSZ/NiCrAlY TBC System

The effects of oxide temperatures and the thickness of thermally grown oxide (TGO) on thermal stress distribution in thermal barrier coating (TBC) system are studied in the present paper. A typical TBC system is used: air plasma sprayed (APS) Scandia, yttria-stabilized zirconia (ScYSZ) top coat (TC) and NiCrAlY bond coat (BC) deposited on the nickel super-alloy substrate. The behavior of BC oxidation was examined. Both the Numerical model and Finite Element (FE) method were used to analyze the stress distribution. The objective of this study is to provide important information for understanding the failure mechanism of TBC at least in a qualitative way.
sc2o3-y2o3-zro2 thermal barrier coating stress analysis finite element tgo
H.F.Liu Q.L.Li S.L.Li Y.M.Li
State key laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083,P.R.Chin Science and Technology on Power Beam Processes Laboratory, AVIC Beijing Aeronautical Manufacturing T
国际会议
北京
英文
208-212
2010-10-25(万方平台首次上网日期,不代表论文的发表时间)