吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (1): 60-64.

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Fabrication, microstructure and mechanical properties of AZ91 matrix composites reinforced with Grp and Al2O3f

YANG Xiao-hong1, LIU Yong-bing1, WANG Jun1, YANG Chong-hong2   

  1. 1. Key Laboratory of Automobile Materials, Ministry of Education, Changchun 130025, China;
    2. The First Automobile Corporation of China, Changchun 130011, China
  • Received:2003-09-17 Online:2004-01-01

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Abstract: On the base of magnesium alloy AZ91 matrix the composites reinforced with graphite particles（Grp） and alumina short fibers(Al2O3f) were fabricated with squeeze casting method.The microstructure and mechanical properties were investigated.The friction and wear characteristics were also studied.The experimental results show that the reinforcement phase dispersed evenly and closely bonded with the matrix.The hardness of the composites decreases with increasing Grp volume fraction,addition of Al2O3fincreases the hardness of the composites.The tensile strength and fracture elongation of the composites decreases with the increasing content of Grp.The tribological behaviors are improved with the increase of Grp content,both the wear rate and friction coefficient reduce.A continuous black lubricating film forms gradually on the sample surface with the friction process.

Key words: squeeze casting, magnesium alloy, composite, lubricating film

CLC Number: 

  • TG146.2
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