Thermal/residual stress in an electron beam physical vapor deposited thermal barrier coating system

被引：147

作者：

Cheng, J

Jordan, EH ^{[1
]}

Barber, B

Gell, M

机构：

[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA

[2] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

来源：

ACTA MATERIALIA | 1998年 / 46卷 / 16期

关键词：

D O I：

10.1016/S1359-6454(98)00230-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Elastic-plastic finite element models are used to define the thermal/residual stress state responsible for the observed failure behavior of an electron beam physical vapor deposited yttria stabilized zirconia thermal barrier coating: on a Pt-Al bond coat. The failures were observed to start at grain boundary ridges, some of which evolved into oxide filled cavities. Finite element models are made of the actual interface geometries through the use of metallographic sectioning and image processing. There is a one to one correspondence of calculated tension in the oxide layer and the observed localized damage. Purely elastic analysis failed to show some important tensile regions associated with the observed failure. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Lid. Ali lights reserved.

引用

页码：5839 / 5850

页数：12

共 29 条

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