Comparison of the cyclic oxidation behavior of β-NiAl, β-NiPtAl and γ-γ′ NiPtAl coatings on various superalloys

被引：93

作者：

Haynes, J. A. ^{[1
]}

Pint, B. A. ^{[1
]}

Zhang, Y. ^{[2
]}

Wright, I. G. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Tennessee Technol Univ, Cookeville, TN 38505 USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2007年 / 202卷 / 4-7期

基金：

美国国家科学基金会;

关键词：

oxidation; aluminide; coating; platinum; TBC;

D O I：

10.1016/j.surfcoat.2007.06.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The cyclic oxidation behavior of simple alummide and platinum aluminide coatings on various superalloy substrates was investigated at three temperatures. Coatings of beta-NiAl, beta-NiPtAl and Pt-modified gamma-gamma ' were tested and compared in dry oxygen at 1050, 1100 and 1150 degrees C. There was a clear influence of substrate sulfur content on the oxidation behavior of beta-NiAl coatings at all temperatures. The impact of substrate impurities, especially S content, was significantly reduced for beta-NiPtAl coatings at all temperatures. Simple Pt-modified gamma-gamma ' coatings showed excellent oxidation behavior up to 1100 degrees C on some alloys, but were more sensitive to substrate composition, especially Hf content, than were beta-NiPtAl coatings. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：730 / 734

页数：5

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