Influence of Mg Addition on Graphite Particle Distribution in the Al Alloy Matrix Composites

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• 作者：Zhengang  ; Liu  ; ;   ; ^{lzg125@163.com} ; Guoyin  ; Zu ; Hongjie  ; Luo ; Yihan  ; Liu ; Guangchun  ; Yao
• 关键词：Graphite particles ; Al alloy matrix composites ; Distribution ; Magnesium ; Mechanical properties
• 刊名：Journal of Materials Science & Technology
• 出版年：2010
• 出版时间：March 2010
• 年：2010
• 卷：26
• 期：3
• 页码：244-250
• 全文大小：834 K

文摘

Al alloy matrix composites reinforced with copper-coated graphite particle have been prepared by melt stirring process in this work. The effect of the addition of Mg on distribution of the graphite particles has been investigated. Scanning electron microscopy (SEM) was used to observe the micro-morphology of Al alloy matrix composites reinforced with graphite particles. Meanwhile, the content of graphite was analyzed in the different position of casting by dissolution method and the mechanical properties of the composites were detected. The results show that the content of graphite increase with increasing Mg content; the graphite particles distribute uniformly in the particle reinforced metal matrix composites (PMMC) with 0.6 wt pct Mg; however, the agglomeration of the graphite particles is observed obviously in the matrix when Mg content is more than 1.0 wt pct. In addition, the proper Mg addition amount is beneficial to enhance the mechanical properties of the graphite particles reinforced Al alloy matrix composites and the abrasion resistance of the materials due to a reduce friction coefficient.