Structure and Mechanical Properties of Al-based Gradient Composites Reinforced with Primary Si and Mg2Si Particles through Centrifugal Casting
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第4期
论文作者：翟彦博 MA Xiuteng MEI Zhen
文章页码：813 - 818
摘 要：The structure and mechanical properties of a new type of Al-based discontinuous gradient composites prepared by using the ternary Al-19Si-5Mg alloys as the raw material adopting the centrifugal casting method were investigated. Structurally, the composites are divided into two zones: a reinforced zone with the high volume fraction of primary Si and Mg2Si particles and an unreinforced zone with no or a few particles. In the reinforced zone, the primary particles are evenly distributed, with the sizes of the primary Si particles 80-120 μm, and that of primary Mg2Si particles 20-50 μm. The properties test results show the reinforced zone has higher Rockwell hardness and better wear resistance than the unreinforced zone, due to the complementary reinforcement relationship between the primary Si and Mg2Si particles and their high volume fraction.
翟彦博1，MA Xiuteng1，MEI Zhen2
1. College of Engineering and Technology, Southwest University2. Congqing Machine Tool (Group) Co.,Ltd.
摘 要：The structure and mechanical properties of a new type of Al-based discontinuous gradient composites prepared by using the ternary Al-19Si-5Mg alloys as the raw material adopting the centrifugal casting method were investigated. Structurally, the composites are divided into two zones: a reinforced zone with the high volume fraction of primary Si and Mg2Si particles and an unreinforced zone with no or a few particles. In the reinforced zone, the primary particles are evenly distributed, with the sizes of the primary Si particles 80-120 μm, and that of primary Mg2Si particles 20-50 μm. The properties test results show the reinforced zone has higher Rockwell hardness and better wear resistance than the unreinforced zone, due to the complementary reinforcement relationship between the primary Si and Mg2Si particles and their high volume fraction.
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