Laser induced structural and microstructural transformations of plasma sprayed Al2O3 coatings

被引：44
|
作者：
Krishnan, R [1 ]
Dash, S [1 ]
Rao, CB [1 ]
Rao, RSS [1 ]
Tyagi, AK [1 ]
Raj, B [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India
来源：
SCRIPTA MATERIALIA | 2001年 / 45卷 / 06期
关键词：
coating; X-ray diffraction; ceramics; phase transformations; laser treatment;
D O I：
10.1016/S1359-6462(01)01081-8
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Air plasma sprayed Al2O3 coatings on metallic substrates suffer from porosities and metastable polymorphs. In this study, laser treatment employed to improve the coating properties resulted in transformation of the as-sprayed coating, predominantly consisting of metastable gamma -Al2O3 into thermodynamically stable alpha -Al2O3 phase with enhanced microhardness and reduced surface toughness. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：693 / 700
页数：8
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