Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing
Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing
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DOI：
10.1016/j.actamat.2010.04.036
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发表时间：
2010-08
期刊：
影响因子：
9.4
通讯作者：
Yufeng Wu;G. Kim;I. Anderson;T. Lograsso
中科院分区：
文献类型：
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作者：
Yufeng Wu;G. Kim;I. Anderson;T. Lograsso
碳化硅（SiC）颗粒增强铝合金因其良好的结构和热性能而得到广泛研究。然而，对于金属基复合材料的增强相的载荷极限的研究有限。本文采用半固态粉末工艺（SPP）制备了SiC颗粒增强的Al6061铝合金。高体积负载（>45vol.%）通过改变SiC颗粒的体积分数、成形压力、SiC颗粒尺寸和Al 6061颗粒尺寸，研究了SiC颗粒在Al 6061基体中的分布。通过对增强相的压制行为和工艺参数的研究，探讨了SPP法制备复合材料的压制和合成机理。对试样的显微组织、硬度、断口形貌和X射线衍射结果进行了分析。结果表明，SPP可以达到50vol.%以上SiC在Al6061基体中的加载密度接近理论密度。
Aluminum alloys reinforced with silicon carbide (SiC) particles have been studied extensively for their favorable properties in structural and thermal applications. However, there has been only limited research into investigating the loading limit of a reinforcement phase of a metal matrix composite. In this paper, semi-solid powder processing (SPP), a fabrication method that exploits the unique behavior of a solid–liquid mixture, was used to synthesize SiC particle-reinforced Al6061. A high volume loading (>45vol.%) of SiC in Al6061 matrix was investigated by varying the SiC loading volume fraction, forming pressure, SiC particle size and Al6061 particle size. The compaction and synthesis mechanism of the composite by SPP was discussed based on reinforcement phase compaction behavior and processing parameters. Microstructure, hardness, fracture surface and X-ray diffraction results were also analyzed. Results showed that SPP can achieve over 50vol.% loading of SiC in Al6061 matrix with near theoretical density.