Experimental study on fabrication of Al—Al2O3/Grp metal matrix composites
Experimental study on fabrication of Al—Al2O3/Grp metal matrix composites
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Al—Al2O3/Grp金属基复合材料制备实验研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P.B. Mahapatra
中科院分区：
文献类型：
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作者：
A. Manna;H. Bains;P.B. Mahapatra
本文采用熔体搅拌法制备了Al-6070/Al_2O_3和Al-6070/石墨增强金属基复合材料。通过改变增强颗粒的体积分数（5%~ 15%）制备了MMC棒和板。氧化铝（Al 2 O3）和石墨（Grp）的平均增强颗粒尺寸分别为2 3和5 3 μm。采用石墨搅拌桨在200 rpm转速下搅拌15 min，研究了制备的复合材料的微观结构和力学性能。结果表明，复合材料的硬度随着增强颗粒体积分数的增加而增加。拉伸强度和冲击强度均随增强体体积分数的增加而降低。采用Al-Si基钎料对制备的复合板进行了气焊。进行了洛氏硬度测试，给出了未焊区和焊区的洛氏硬度测试结果。
In this study, aluminum (Al-6070)/alumina (Al2O3) and Al-6070/graphite (Gr)-reinforced metal—matrix composites (MMCs) are fabricated by melt-stirring technique. The MMC bars and plates are prepared with varying the reinforced particles volume fraction ranging from 5% to 15%. The average reinforced particle sizes of alumina (Al 2O3) and graphite (Grp) are 23 and 53 μm, respectively. The stirring process was carried out at 200 rpm rotating speed by graphite impeller for 15 min. The microstructure and mechanical properties are investigated on prepared MMCs. It was observed that the hardness of the composite is increased with the increase in reinforced particle volume fraction. Both tensile strength and impact strength are decreased with increase in reinforced volume fraction. The prepared composite plates are welded by gas welding with Al—Si-base filler metal. Rockwell hardness test was conducted and the test result was presented for un-welded and welded zones.