Tribological performance of plasma sprayed Al2O3-Y2O3 composite coatings

被引：27
|
作者：
Rong, Jian [1 ,2 ]
Yang, Kai [1 ]
Zhao, Huayu [1 ]
Liu, Chenguang [1 ]
Zhuang, Yin [1 ]
Tao, Shunyan [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Coating Mat, Shanghai 201899, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2016年 / 302卷
基金：
中国国家自然科学基金;
关键词：
Plasma spraying; Alumina; Yttria; Friction and wear; MECHANICAL-PROPERTIES; METASTABLE PHASES; TITANIA COATINGS; MICROSTRUCTURE; BEHAVIOR; OXIDE; RESISTANCE; WEAR;
D O I：
10.1016/j.surfcoat.2016.06.053
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In the present study, Al2O3 and Al2O3-Y2O3 composite coatings were deposited by atmospheric plasma spraying. The microstructure, hardness, thermal conductivity and dry sliding wear behavior of the coatings were examined. The results showed that the mass ratio of alpha-Al2O3/gamma-Al2O3 in as-sprayed Al2O3 coating was 0.08. However, the corresponding value in Al2O3-Y2O3 composite coating was 0.53. This exhibits salient influence on the stabilization of alpha-Al2O3. The addition of Y2O3 was beneficial to improve the thermal conductivity of the composite coating. In addition, Al2O3-Y2O3 composite coating/graphite pairs possess more stable friction coefficients, which may be related to the formation of more effective and stable graphite transferred film on the surface of the coating subjected to abrasion. Further, the wear resistance of Al2O3-Y2O3 composite coatings was superior to that of Al2O3 coatings. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：487 / 494
页数：8
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