Oxidation behavior of thermal barrier coatings modified by laser remelting

被引：35

作者：

Chang, KC ^{[1
]}

Wei, WJ ^{[1
]}

Chen, C ^{[1
]}

机构：

[1] Natl Taiwan Univ, Inst Mat Sci & Engn, Taipei 106, Taiwan

来源：

SURFACE & COATINGS TECHNOLOGY | 1998年 / 102卷 / 03期

关键词：

laser remelting; zirconia; thermal barrier coating; oxidation test;

D O I：

10.1016/S0257-8972(97)00657-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, a bond coat (Ni-22Cr-10A1-1Y (wt%)) and a top coat (ZrO2-7.5 wt% Y2O3) were deposited on 304 stainless steel by air plasma spraying and then processed with either single laser remelting (SLR) or double laser remelting (DLR) treatment. Preheating specimens at 950 degrees C in the SLR treatment reduced depressions and the width of cracks in the top coat. A recently developed DLR treatment, in which zirconia powder in the form of a colloidal suspension was applied after SLR and then laser remelted again, helped to lower the extent of surface defects in the top coat significantly. Oxidation tests at 1200 degrees C indicated that the DLR specimens had a better oxidation resistance than the SLR and the plasma-sprayed specimens. (C) 1998 Published by Elsevier Science S.A.

引用

页码：197 / 204

页数：8

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