Development and characterization of liquid carbon fibre reinforced aluminium matrix composite
Development and characterization of liquid carbon fibre reinforced aluminium matrix composite
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DOI：
10.1016/j.jmatprotec.2008.12.012
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发表时间：
2009-06
影响因子：
6.3
通讯作者：
T. Shalu;E. Abhilash;M. Joseph
中科院分区：
文献类型：
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作者：
T. Shalu;E. Abhilash;M. Joseph
随着材料技术的进步和发展，出现了金属基复合材料（MMCs）等新型材料。金属基复合材料由于其优异的物理、力学性能和可开发性，在航空、汽车等领域得到了广泛的应用。本文介绍了用挤压铸造浸渗法制备体积分数为20-25%的碳预制体增强铝基复合材料的研究情况。对挤压铸造基体和复合材料进行了硬度、冲击和拉伸试验，研究了挤压铸造基体和复合材料性能的改善情况。尽管复合材料的极限拉伸强度被发现降低，布氏硬度值增加和韧性的四倍的改善被注意到。使用光学和扫描电子显微镜（SEM）进行的材料的表征表明，碳纤维均匀地分布在基体中，合金似乎具有较小的枝晶尺寸。由于液态合金对纤维的良好润湿，导致在断裂时没有观察到纤维拔出和机械性能改善。
The progress and developments in materials technology have resulted in several new materials like metal–matrix composites (MMCs). On account of excellent physical, mechanical and development properties, MMCs are applied widely in aircraft and automobile technology. The present paper deals with the development of aluminium matrix composite reinforced with carbon preform having a volume fraction of 20–25% using squeeze casting infiltration process. Hardness, impact and tension test on the squeeze cast matrix and the composite was conducted to study the improvement in properties compare to that of matrix. Even though ultimate tensile strength of composite is found to be decreased, an increased Brinell hardness number and a four-fold improvement in toughness are noticed. Characterization of the materials done using optical and scanning electron microscope (SEM) revealed that the carbon fibers are evenly distributed in the matrix and the alloy is appeared to have smaller dendrite size. The lack of observed fibre pull-out on fracture and improved mechanical properties resulted due to the good wetting of the fibers by the liquid alloy.