Microstructure and properties of in-situ ceramic matrix eutectic nanocomposite coating prepared by plasma spraying Al-Cr2O3-Al2O3 powder

被引：16
|
作者：
Yan, Dian-ran [1 ,2 ]
Dai, Xue-rui [1 ,2 ,3 ]
Yang, Yong [1 ,2 ]
Dong, Yan-chun [1 ,2 ]
Chen, Xue-guang [1 ]
Chu, Zhen-hua [1 ,2 ]
Zhang, Jian-xin [1 ]
机构：
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Key Lab New Type Funct Mat Hebei Prov, Tianjin 300132, Peoples R China
[2] Hebei Univ Technol, Tianjin Key Lab Mat Laminating Fabricat & Interfa, Tianjin 300130, Peoples R China
[3] Hebei Univ Sci & Technol, Sch Mat Sci & Engn, Shijiazhuang 050018, Hebei, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 748卷
基金：
中国国家自然科学基金;
关键词：
Plasma spraying; Composite coating; Nanostructured coating; Eutectic coating; Al-Cr2O3 thermite reaction; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; BEHAVIOR;
D O I：
10.1016/j.jallcom.2018.03.172
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
According to the characteristic of eutectic solidification, the [Cr+(Cr,Al)(2)O-3] eutectic nanocomposite coating was in-situ synthesized by reactive plasma spraying Al-Cr2O3-Al2O3 powder. The microstructure of the [Cr+(Cr,Al)(2)O-3] coating shows the characteristic of nanostructure, in which Cr with granular and rod shape distributed homogeneously in (Cr,Al)(2)O-3 matrix. The particle size of Cr was less than 10 nm, and the diameter of Cr with rod shape was less than 20 nm and the length of the rod was less than 100 nm. The microhardness of the [Cr+(Cr,Al)(2)O-3] eutectic nanocomposite coating and the (Cr,Al)(2)O-3 coating were HV0.3 1764 and HV0.3 1129, respectively. The toughness of the eutectic nanocomposite coating was higher than that of the (Cr+(Cr,Al)(2)O-3 coating. The wear resistance of the eutectic nanocomposite coating was 5.57 times of the (Cr,Al)(2)O-3 coating. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：230 / 235
页数：6
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