Tribological behavior of SNC-MAO composite coatings formed on the surface of aluminum alloys

被引：0
|
作者：
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing [1 ]
100083, China
不详 [2 ]
150080, China
机构：
[1] National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing
[2] Institute of Advanced Ceramics, Harbin Institute of Technology, Harbin
来源：
Gongcheng Kexue Xuebao | / 10卷 / 1350-1357期
关键词：
Aluminum alloys; Composite coatings; Microarc oxidation; Nanocrystallization; Surface mechanical attrition treatment; Tribology;
D O I：
10.13374/j.issn2095-9389.2015.10.015
中图分类号：
学科分类号：
摘要：
A duplex process was designed to modify the surface of LY12CZ aluminum alloy by using surface mechanical attrition treatment (SMAT) prior to microarc oxidation (MAO). A surface nanocrystalline (SNC) layer was formed on the alloy surface by SMAT, a ceramic outer layer grew on the SNC layer by MAO, and finally an SNC-MAO composite coating was fabricated. The tribological behaviors of the MAO coating and SNC-MAO composite coating were comparatively evaluated. Experimental results showed that the SNC-MAO composite coating had a better wear resistance than the MAO coating in the same test condition due to a higher hardness of the ceramic coating. The wear mechanism of the MAO coating and SNC-MAO composite coating involved materials transfer from the steel ball to the coating and oxidation wear. © All right reserved.
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页码：1350 / 1357
页数：7
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