Microstructure and mechanical properties of aluminum alloy matrix composite reinforced with nano-particle MgO
Microstructure and mechanical properties of aluminum alloy matrix composite reinforced with nano-particle MgO
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DOI：
10.1016/j.jallcom.2009.04.117
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发表时间：
2009-09
影响因子：
6.2
通讯作者：
A. Yar;Maziar Montazerian;H. Abdizadeh;H. Baharvandi
中科院分区：
文献类型：
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作者：
A. Yar;Maziar Montazerian;H. Abdizadeh;H. Baharvandi
本研究采用搅拌铸造法制备了纳米MgO颗粒含量分别为1.5%、2.5%和5%（体积分数）的增强铝合金（A356.1）基复合材料。在各种铸造温度下进行制造，即800、850和950°C。通过对复合材料的密度、显微组织和力学性能的评价，确定了最佳的增强体用量和浇注温度。采用扫描电镜（SEM）和X射线衍射（XRD）对复合材料进行了表征。进行硬度和压缩测试以确定机械性能。结果表明，在850°C下制备的含1.5vol%增强颗粒的复合材料具有均匀的微观结构和较好的力学性能。
In this research, aluminum alloy (A356.1) matrix composites reinforced with 1.5, 2.5 and 5vol% nano-particle MgO were fabricated via stir casting method. Fabrication was performed at various casting temperatures, viz. 800, 850 and 950°C. Optimum amount of reinforcement and casting temperature were determined by evaluating the density, microstructure and mechanical properties of composites. The composites were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Hardness and compression tests were carried out in order to identify mechanical properties. The results reveal that the composites containing 1.5vol% reinforcement particle fabricated at 850°C have homogenous microstructure as well as improved mechanical properties.