混合铝基复合材料的力学性能和耐磨性英文.pdf

Trans. Nonferrous Met. Soc. China 23(2013) 2509−2517 Evaluation of mechanical and wear properties of hybrid aluminium matrix composites 1 2 3 T. RAJMOHAN , K. PALANIKUMAR , S. RANGANATHAN 1. Sri Chandrasekharendra Saraswathi Viswa Maha Vidyalaya University, Enathur, Kanchipuram-631561, India; 2. Sri Sai Ram Institute of Technology, Chennai-600 044, India; 3. Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha University, Chennai-602105, India Received 6 September 2012; accepted 8 January 2013 Abstract: Hybrid metal matrix composites are important class of engineering materials used in automotive, aerospace and other applications because of their lower density, higher specific strength, and better physical and mechanical properties compared to pure aluminium. The mechanical and wear properties of hybrid aluminium metal matrix composites were investigated. Mica and SiC ceramic particles were incorporated into Al 356 alloy by stir-casting route. Microstructures of the samples were studied using scanning electron microscope (SEM). The chemical composition was investigated through energy dispersive X-ray (EDX) detector. The results indicate that the better strength and hardness are achieved with Al/10SiC−3mica composites. The increase in mass fraction of mica improves the wear loss of the composites. Key words: hybrid metal matrix composites; SiC; mica; Al 356; stir casting; wear l