Structure and mechanical properties of Al-based gradient composites reinforced with primary Si and Mg2Si particles through centrifugal casting
Structure and mechanical properties of Al-based gradient composites reinforced with primary Si and Mg2Si particles through centrifugal casting
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离心铸造初生Si和Mg2Si颗粒增强铝基梯度复合材料的结构和力学性能
DOI：
10.1007/s11595-013-0774-6
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发表时间：
2013-07
影响因子：
1.6
通讯作者：
Mei Zhen
中科院分区：
文献类型：
--
作者：
Zhai Yanbo;Ma Xiuteng;Mei Zhen
研究了以三元Al-19 Si-5 Mg合金为原料，采用离心铸造法制备的新型铝基非连续梯度复合材料的组织和力学性能。在结构上，复合材料分为两个区域：一个增强区与初晶Si和Mg 2Si颗粒的高体积分数和未增强区没有或几个颗粒。在强化区中，初生颗粒分布均匀，初生Si颗粒尺寸为80-120 μm，初生Mg 2Si颗粒尺寸为20-50 μm。性能测试结果表明，由于初晶Si和Mg 2Si颗粒之间的互补强化关系以及它们的高体积分数，强化区比未强化区具有更高的洛氏硬度和更好的耐磨性。
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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DOI：
10.1016/j.msea.2011.01.034
发表时间：
2011-04
影响因子：
6.4
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DOI：
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