Rumpling induced by thermal cycling of an overlay coating: the effect of coating thickness

被引：54

作者：

Tolpygo, VK ^{[1
]}

Clarke, DR ^{[1
]}

机构：

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

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 03期

关键词：

coatings; nickel aluminide; cyclic oxidation; surface roughening;

D O I：

10.1016/j.actamat.2003.10.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Initially flat NiAl-based overlay coatings on a Ni-base superalloy substrate develop surface undulations when cyclically oxidized at high-temperatures. The effect of the coating thickness on the amplitude and wavelength of the undulations is described. The amplitude, after 100 one-hour cycles to 1150 degreesC in air, appears to have a maximum at intermediate thicknesses between 100 and 150 mum whereas the effective wavelength increases with the coating thickness. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：615 / 621

页数：7

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