Effects of Mg<sub>2</sub>Si Contents on Microstructure and Properties of Mg<sub>2</sub>Si Particle Reinforced Hypereutectic Al-Si Alloy Composites

Liu Zheng1; Liu Xiaomei1; Chen Ming2; Xie Min2

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Effects of Mg₂Si Contents on Microstructure and Properties of Mg₂Si Particle Reinforced Hypereutectic Al-Si Alloy Composites
Vol. 31, Issue 10, Pages: 899-903(2011)
Published： 2011 ，
DOI：

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[1]刘政,刘小梅,陈明,谢敏.Mg_2Si含量对过共晶Al-Si复合材料组织及性能的影响[J].特种铸造及有色合金,2011,31(10):899-903.

Liu Zheng1, Liu Xiaomei1, Chen Ming2, et al. Effects of Mg₂Si Contents on Microstructure and Properties of Mg₂Si Particle Reinforced Hypereutectic Al-Si Alloy Composites. [J]. Special Casting & Nonferrous Alloys 31(10):899-903(2011)
[1]刘政,刘小梅,陈明,谢敏.Mg_2Si含量对过共晶Al-Si复合材料组织及性能的影响[J].特种铸造及有色合金,2011,31(10):899-903. DOI：

Liu Zheng1, Liu Xiaomei1, Chen Ming2, et al. Effects of Mg₂Si Contents on Microstructure and Properties of Mg₂Si Particle Reinforced Hypereutectic Al-Si Alloy Composites. [J]. Special Casting & Nonferrous Alloys 31(10):899-903(2011) DOI：

摘要

用直接熔体反应法制备了Mg2Si增强过共晶Al-Si合金复合材料

研究了Mg2Si含量对复合材料的凝固组织和性能的影响。结果表明

Mg2Si的形貌随着其含量的增加而明显变化

由多边形块状向颗粒状转变

最终转变成粗大的树枝状。复合材料的硬度和耐磨性能与初生Mg2Si相的形态和数量有一定关系。

Abstract

Mg2Si particle reinforced hypereutectic Al-Si alloy composites were prepared by direct melt reaction

and the effects of Mg2Si content on the microstructure and properties of the composites were investigated. The results show that the Mg2Si morphology in the composites is obviously changed with increasing in its content

which is transformed from polygonal block structure into the particle

and then into the coarse dendrite. The hardness and wear resistance of the composites exhibit the distinct relationship with the morphology and amounts of Mg2Si phase.