Spatially varying microhardness in a platinum-modified nickel aluminide bond coat in a thermal barrier coating system

被引：9
|
作者：
Zhang, M [1 ]
Heuer, AH [1 ]
机构：
[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA
来源：
SCRIPTA MATERIALIA | 2006年 / 54卷 / 07期
关键词：
coatings; TEM; PVD; microindentation; nickel base alloy bond coats;
D O I：
10.1016/j.scriptamat.2005.12.034
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The hardness of a Pt-modified Ni aluminide bond coat and its ZrO2 top coat in an electron beam-physical vapor deposition ZrO2-based thermal barrier coating system has been studied as a function of temperature in as-deposited and aged (1200 degrees C/1 h) coupon samples, and in a used blade taken out of service after a (modest) fraction of life. A marked brittle to ductile transition at 580 +/- 30 degrees C was observed in the as-deposited material, in agreement with previous uniaxial tensile data in this system. Significant spatial variation in the hardness of the bond coats were observed at room temperature and could be correlated with spatially varying microstructures. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1265 / 1269
页数：5
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