Analytical modeling of oxide thickness effects on residual stresses in thermal barrier coatings

被引：86

作者：

Hsueh, CH ^{[1
]}

Fuller, ER

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

来源：

SCRIPTA MATERIALIA | 2000年 / 42卷 / 08期

关键词：

modeling; thermal barrier coating; thermal expansion; stress;

D O I：

10.1016/S1359-6462(99)00430-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A study was carried out to explore the physical meaning of the trend of the stress state of concave asperity (σy) in the ceramic top coat with the variation of the thermally grown oxide (TGO) thickness. This objective was met by using a simple analytical model of three consecutive circles. First, the residual thermal stresses in the three-concentric-circles model were derived. Following this, the results for residual radial stresses at the top coat/TGO and the TGO/bond coat interfaces were obtained as functions of the TGO thickness.

引用

页码：781 / 787

页数：7

共 9 条

[1] The influence of the reactive element yttrium on the stress in alumina scales formed by oxidation [J].