Enhanced performance of nano-sized SiC reinforced Al metal matrix nanocomposites synthesized through microwave sintering and hot extrusion techniques
Enhanced performance of nano-sized SiC reinforced Al metal matrix nanocomposites synthesized through microwave sintering and hot extrusion techniques
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DOI：
10.1016/j.pnsc.2017.08.015
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发表时间：
2017-10-01
影响因子：
4.7
通讯作者：
Gupta, Manoj
中科院分区：
文献类型：
--
作者：
Reddy, M. Penchal;Shakoor, R. A.;Gupta, Manoj
采用微波烧结和热挤压技术制备了纳米SiC（体积分数分别为0、0.3、0.5、1.0和1.5%）增强铝基复合材料。研究了Al-SiC纳米复合材料的结构（XRD、SEM）、力学性能（纳米压痕、压缩、拉伸）和热性能（热膨胀系数-CTE）。SEM/EDS图像显示SiC纳米颗粒均匀分布在Al基体中。观察到随着SiC含量的增加，Al-SiC纳米复合材料的强度（压缩和拉伸）显著增加。然而，随着SiC体积分数的增加，Al-SiC纳米复合材料的塑性降低。热分析结果表明，随着硬质SiC纳米颗粒的加入，Al-SiC纳米复合材料的热膨胀系数逐渐降低。总的来说，热挤压Al 1.5体积% SiC纳米复合材料表现出最好的机械和热性能相比，其他开发的Al-SiC纳米复合材料。
In the present study, nano-sized SiC (0, 0.3, 0.5, 1.0 and 1.5 vol%) reinforced aluminum (Al) metal matrix composites were fabricated by microwave sintering and hot extrusion techniques. The structural (XRD, SEM), mechanical (nanoindentation, compression, tensile) and thermal properties (co-efficient of thermal expansion-CTE) of the developed Al-SiC nanocomposites were studied. The SEM/EDS mapping images show a homogeneous distribution of SiC nanoparticles into the Al matrix. A significant increase in the strength (compressive and tensile) of the Al-SiC nanocomposites with the addition of SiC content is observed. However, it is noticed that the ductility of Al-SiC nanocomposites decreases with increasing volume fraction of SiC. The thermal analysis indicates that CTE of Al-SiC nanocomposites decreases with the progressive addition of hard SiC nanoparticles. Overall, hot extruded Al 1.5 vol% SiC nanocomposites exhibited the best mechanical and thermal performance as compared to the other developed Al-SiC nanocomposites.