点击次数：

论文类型：期刊论文

发表时间：2011-09-16

发表刊物：Advanced Materials Research

收录刊物：EI、CPCI-S、Scopus

卷号：311-313

页面范围：210-213

ISSN号：9783037852149

关键字：thermal barrier coatings; finite element model; residual stress

摘要：Thermal barrier coatings are used as thermal insulation and thermal protection for high-temperature components of aircraft engines. Service failure of the components is often caused by premature breaking of the coatings. The distributions of residual stress in a ZrO2/NiCoCrAlY thermal barrier coating during thermal cycling was here simulated using finite element method. Four kinds of models involving planar and curved interfaces between the bond and the ceramic top coat layers were established. The simulated results showed that the high residual stress which is about 100-300MPa is present at the interface between bond layer and ceramic layer. The residual stress in curved interface is larger than that in planar one, and concentrates mainly at the troughs. Structure for planar interface exhibits better than curved interface. The residual stress would increase obviously with the presence of thermally grown oxide layer.