Large deformation simulations of cyclic displacement instabilities in thermal barrier systems

被引：55

作者：

He, MY ^{[1
]}

Hutchinson, JW

Evans, AG

机构：

[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[2] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[3] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08540 USA

来源：

ACTA MATERIALIA | 2002年 / 50卷 / 05期

关键词：

physical vapor deposition (PVD); thermal barrier systems; computer simulation; layered materials; fatigue;

D O I：

10.1016/S1359-6454(01)00406-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The cyclic displacement instability exhibited by a thermally grown oxide (TGO) in a thermal barrier system has been simulated using a scheme that embodies large-scale thickening. The investigation has three main objectives. (i) A sensitivity study that probes the influence of the thermo-mechanic properties of the bond coat. It uses properties that closely resemble those relevant to actual bond coat materials. (ii) Explore the influence of the size of the imperfections present on the bond coat surface and address the critical size below which the instability is suppressed. (iii) A determination of the influence of TGO growth kinetics ranging between linear and parabolic. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：1063 / 1073

页数：11

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