In recent years, the composite materials have been very desirable by researchers for many engineering applications such as aviation and biomedical because of the tremendous characteristics of magnesium matrix metal composite. This current investigation aims to develop the AZ91/SiC_p composites with various weight fractions (0, 2.5, 5 and 10 wt%) of silicon carbide particles via the stir casting method. The effect of SiC particles content on microstructure, mechanical and wear behaviour was investigated. The optical microscope, scanning electron microscopy and EDX analyses were utilized to detect the distribution of hard particles as well as the interface between the alloy and particles. Based on the findings, the homogeneous distribution of particles, refinement of grains in addition to good bonding between AZ91 alloy and particles have been achieved in produced composites. Therefore, the mechanical characteristics and wear performance are improved in composites compared with the unreinforced alloy. Moreover, these results suggest that for applications demanding high mechanical properties and wear resistance the AZ91/SiC_p will be effective composites.

中文翻译：

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搅拌铸造AZ91-SiCp复合材料的组织和力学性能研究

近年来，由于镁基金属复合材料的巨大特性，复合材料已被研究人员非常期望用于许多工程应用，例如航空和生物医学。本次调查旨在开发AZ91 / SiC _p通过搅拌铸造法制备具有各种重量分数（0、2.5、5和10重量％）的碳化硅颗粒的复合材料。研究了SiC颗粒含量对组织，力学性能和磨损行为的影响。利用光学显微镜，扫描电子显微镜和EDX分析来检测硬质颗粒的分布以及合金与颗粒之间的界面。基于这些发现，在生产的复合材料中，除了AZ91合金与颗粒之间的良好结合外，还实现了颗粒的均匀分布，细化晶粒。因此，与未增强合金相比，复合材料的机械特性和耐磨性能得到了改善。此外，这些结果表明，对于要求高机械性能和耐磨性的应用，AZ91 / SiC_p将是有效的复合材料。