Pt and Hf additions to NiAl bond coats and their effect on the lifetime of thermal barrier coatings

被引：15

作者：

Nesbitt, JA ^{[1
]}

Gleeson, B

Sordelet, D

Barrett, CA

机构：

[1] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA

[2] US DOE, Ames Lab, Ames, IA 50011 USA

来源：

THERMEC'2003, PTS 1-5 | 2003年 / 426-4卷

关键词：

TBC's; thermal barrier coatings; Ni-aluminides; bond coats;

D O I：

10.4028/www.scientific.net/MSF.426-432.209

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The lifetimes of thermal barrier coatings (TBC's) with various NiAlPt(HfZr) bond coats were determined by cyclic oxidation testing at 1163degreesC (2125degreesF). The bond coats were sprayed from powders by low pressure plasma spraying onto Rene N5 superalloy substrates. Yttria stabilized zirconia (8YSZ) top coats were applied by air plasma spraying. Surprisingly, there was not a strong correlation between TBC lifetime and Pt or Hf content although Zr additions decreased lifetimes. TBC failure morphologies and bond coat microstructures were examined and are discussed with respect to the bond coat compositions.

引用

页码：209 / 214

页数：6

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