Development of Thermal Barrier Coatings on AZ91 Magnesium Alloy Surface

被引：1
|
作者：
Gao, Peihu [1 ]
Li, Jianping [1 ]
Yang, Zhong [1 ]
Guo, Yongchun [1 ]
Wu, Yongxing [2 ]
Liu, Jilin [2 ]
Yang, Zhiling [3 ]
Wang, Yanrong [4 ]
机构：
[1] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710021, Peoples R China
[2] PLA Represent Off, Datong 037036, Peoples R China
[3] Foundry North Gen Power Grp Co Ltd, Datong 037036, Peoples R China
[4] China North Engine Inst, Datong 037036, Peoples R China
来源：
ADVANCED MATERIALS AND PROCESSES III, PTS 1 AND 2 | 2013年 / 395-396卷
关键词：
Magnesium alloy; Thermal barrier coating; Microstructure; Coefficient of thermal expansion; GAS-TURBINE ENGINE; PROTECTIVE-COATINGS;
D O I：
10.4028/www.scientific.net/AMM.395-396.703
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this paper, MCrAlY bonding layer was prepared through high velocity-oxygen fuel spray on the AZ91 magnesium alloy surface. 8wt%YSZ ceramic layer was deposited on the surface of bonding layer through atmospheric plasma spraying. The coatings were characterized by XRD and SEM. The hardness of the coating was tested. The coefficients of thermal expansion of the coating were measured through TMA. It was found that there were un-melted 8YSZ particles surrounded by melted particles layer by layer. Parts of ZrO2 transited from cubic to tetragonal. The microhardness of the YSZ coating and bonding layer were 832.1Hv(0.3) and 700.3Hv(0.3), respectively. The coefficients of thermal expansion of the magnesium alloy, MCrAlY layer and YSZ coating were 42.46 x10(-6).k(-1), 15.26 x10(-6).k(-1), 9.28 x10(-6).k(-1), respectively. The bonding coat matched the magnesium alloy substrate and the YSZ coating well. The dimension of AZ91 magnesium alloy sample was very stabilized before and after coating deposition.
引用
收藏
页码：703 / +
页数：3
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