Improved the elevated temperature mechanical properties of Al-Si alloy deposited with Al-Si coating by magnetron sputtering

被引：20

作者：

Xu, Feng ^{[1
,2
]}

Gong, Dongmei ^{[1
]}

机构：

[1] West Anhui Univ, Sch Mech & Vehicle Engn, Luan 237012, Anhui, Peoples R China

[2] Hefei Univ Technol, Sch Mech Engn, Hefei 230009, Anhui, Peoples R China

来源：

VACUUM | 2018年 / 150卷

关键词：

Al-Si alloy; Elevated temperature; Surface defect; Friction coefficient; Wear; SURFACE MODIFICATION; WEAR-RESISTANCE; LOW-FRICTION; MICROSTRUCTURE; COMPOSITES; FILMS; NANOCOMPOSITE; STABILITY; STRENGTH; LAYER;

D O I：

10.1016/j.vacuum.2018.01.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compact and uniform aluminum silicon (Al-Si) coatings with different Si contents were deposited on Al-Si alloy by magnetron sputtering. The structure and mechanical properties of the Al-Si alloy covered with Al-Si coating were characterized. The results indicate that the introduction of Al-Si coating on Al-Si alloy surface can increase the mechanical properties of Al-Si material. Hardness and elastic modulus of the Al-Si coating with 25.2 at % Si reach about 23.6 GPa and 178.0 GPa, respectively, which are obviously higher than those of Al-Si bulk. The Al-Si coating with 25.2 at % Si exhibits the lowest friction coefficient of 0.231 and lowest wear rate of 0.9-1.4 x 10(-6) mm(3)/Nm. The low friction coefficient of Al-Si coating is attributed to the Al and Si debris which react with thermal moisture to form aluminum and silicon oxide, serving as a lubricant between two contact counterparts. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：1 / 7

页数：7

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