Oxidation and hot corrosion behavior of a novel enamel-Al2O3 composite coating on K38G superalloy

被引：51

作者：

Zheng, DY ^{[1
]}

Zhu, SL ^{[1
]}

Wang, FH ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2006年 / 200卷 / 20-21期

基金：

国家高技术研究发展计划(863计划);

关键词：

composite; coating; superalloy; oxidation; hot corrosion;

D O I：

10.1016/j.surfcoat.2005.09.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel enamel-Al2O3 composite coating with a thin NiCoCrAIY bond coat was prepared on K38G superalloy. Results indicated that this composite coating exhibited excellent high temperature oxidation resistance at 900 and 1000 degrees C and hot corrosion resistance in molten sulfate salts at 900 degrees C, much better than solo NiCoCrAlY coating and uncoated K38G. The protection mechanism of this composite coating was different from those of traditional metallic coatings. It was no longer oxidized during tests and acted as a barrier to effectively hinder the corrosive species from migrating into substrate. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：5931 / 5936

页数：6

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