The effects of active element additions on the oxidation performance of a platinum aluminide coating at 1100 °C

被引：34

作者：

Fisher, G ^{[1
]}

Datta, PK ^{[1
]}

Burnell-Gray, JS ^{[1
]}

Chan, WY ^{[1
]}

Soares, JC ^{[1
]}

机构：

[1] Northumbria Univ, Sch Engn, Surface Engn Res Grp, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England

来源：

SURFACE & COATINGS TECHNOLOGY | 1998年 / 110卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

active element additions; oxidation performance; platinum aluminide coating;

D O I：

10.1016/S0257-8972(98)00548-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The beneficial effects of active element additions to both overlay coatings and beta-NiAl intermetallics are well documented in the literature. The addition of such elements has been noted to increase the adherence of a protective oxide scale, decrease the oxide growth rate and improve the mechanical properties of the oxide. The present study aimed to assess the effects of the ion implantation of either Hf or Y to a platinum aluminide on a MarM002 substrate, to determine whether the additions would act to improve the coating's performance under hot oxidation conditions. The samples were isothermally exposed to laboratory air for 100, 250 and 500 h at 1100 degrees C. Their performance was assessed by comparing the oxide growth rate, adherence and composition to that formed by an untreated coating. The additions were found to have had no observable effects on the performance of the coating, promoting oxides that had a similar adhesion, growth rate and composition as were formed on untreated systems. However, the study did reveal the detrimental effects of excessive hafnium peg formation and their role in the degradation of the coatings. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：24 / 30

页数：7

共 18 条

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[2]

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