On the rumpling mechanism in nickel-aluminide coatings - Part II: characterization of surface undulations and bond coat swelling

被引：94

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 / 17期

关键词：

coatings; nickel aluminide; oxidation; surface roughening;

D O I：

10.1016/j.actamat.2004.07.023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A quantitative characterization of the surface morphology of platinum-modified nickel aluminide bond coats that develops in the course of cyclic and isothermal oxidation at 1150 degreesC is presented. The amplitude and wavelength of surface undulations and their evolution with oxidation time are evaluated. Surface roughening (rumpling) is accompanied by swelling of the bond coat, especially during the initial stages of oxidation. The experimental results indicate that the two processes may be related and a possible link between rumpling and swelling is suggested. It is expected that the data will be useful in developing refined models of rumpling. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：5129 / 5141

页数：13

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