Wear resistance and adhesive failure of thermal spray ceramic coatings deposited onto graphite in response to ultrasonic nanocrystal surface modification technique

被引:33
作者
Amanov, A. [1 ]
机构
[1] Sun Moon Univ, Dept Mech Engn, Asan 31460, South Korea
基金
新加坡国家研究基金会;
关键词
Thermal spray coatings; Hardness; Critical load; Friction; Wear; UNSM; MECHANICAL-PROPERTIES; TRIBOLOGICAL PROPERTIES; AL2O3; COATINGS; MICROSTRUCTURE; PARAMETERS; BEHAVIOR; HVOF;
D O I
10.1016/j.apsusc.2017.11.013
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
In this study, thermal spray ceramic (TSC) coatings sprayed onto a graphite were subjected to ultrasonic nanocrystal surface modification (UNSM) technique. The surface roughness of the as-received Cr3C2, ZrO2 and Al2O3 coatings was reduced by about 28, 24 and 9% after UNSM treatment, which can be explained that the high peaks were removed during UNSM treatment, where a flat surface area is enlarged due to the partially elimination of single-and interconnected micro-pores. In addition, the number of cracks is also reduced by filling up the cracks by a smashed coating powder due to the continuous high-frequency strikes of a tip to the surface of the coating resulting in increase in surface hardness of the as-received Cr3C2, ZrO2 and Al2O3 coatings by about 14, 10 and 6% after UNSM treatment, respectively. The wear resistance and adhesive failure of the coatings were improved after UNSM treatment as well representing a remarkable influence on the friction and wear performance, and the critical load of the coatings. Hence, it is expected that a hybrid use of TSC coatings with UNSM technique is beneficial to improving the surface and adhesion behavior of the coatings to be applied to a graphite mold to produce a glass. (c) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:184 / 197
页数:14
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