Wear properties of Saffil/Al,Saffil/Al2O3/Al and Saffil/SiC/Al hybrid metal matrix composites |
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| Affiliation: | 1. Department of Mechanical Engineering, Changwon National University, Changwon, Kyungnam 641-773, South Korea;2. Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, South Korea;1. Department of Materials Science and Engineering, Bu-Ali Sina University, Hamedan, Iran;2. Materials Science and Engineering Department, Hamedan University of Technology, Hamedan, Iran;3. Department of Materials Engineering, Malayer University, Malayer, Iran;1. Department of Materials Engineering, Sahand University of Technology, Tabriz, Iran;2. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;3. Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea;1. Department of Mechanical Engineering, Anna University, Chennai 600025, Tamil Nadu, India;2. Department of Mechanical Engineering, Nehru Institute of Engineering and Technology, Coimbatore 641105, Tamil Nadu, India;3. IDM-Joint Lab, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;4. Department of Mechanical Engineering, Dr. N.G.P. Institute of Technology, Coimbatore 641048, Tamil Nadu, India;5. Department of Mechanical Engineering, Shaqra University, Dawadmi, Riyadh 11911, Saudi Arabia;1. Department of Mechanical Engineering, Anna University, Chennai 600025, Tamil Nadu, India;2. Department of Mechanical Engineering, Nehru Institute of Engineering and Technology, Coimbatore 641105, Tamil Nadu, India;3. Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg 2006, South Africa;4. Department of Mechanical Engineering, Coimbatore Institute of Technology, Coimbatore 641014, Tamil Nadu, India;1. School of Material Science and Engineering, Hefei University of Technology, Hefei 230009, China;2. Laboratory of Nonferrous Metal Materials and Processing Engineering of Anhui Province, Hefei 230009, China;3. National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei 230009, China |
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| Abstract: | The purpose of this study is to investigate the wear properties of Saffil/Al, Saffil/Al2O3/Al and Saffil/SiC/Al hybrid metal matrix composites (MMCs) fabricated by squeeze casting method. Wear tests were done on a pin-on-disk friction and wear tester under both dry and lubricated conditions. The wear properties of the three composites were evaluated in many respects. The effects of Saffil fibers, Al2O3 particles and SiC particles on the wear behavior of the composites were elucidated. Wear mechanisms were analyzed by observing the worn surfaces of the composites. The variation of coefficient of friction (COF) during the wear process was recorded by using a computer. Under dry sliding condition, Saffil/SiC/Al showed the best wear resistance under high temperature and high load, while the wear resistances of Saffil/Al and Saffil/Al2O3/Al were very similar. Under dry sliding condition, the dominant wear mechanism was abrasive wear under mild load and room temperature, and the dominant wear mechanism changed to adhesive wear as load or temperature increased. Molten wear occurred at high temperature. Compared with the dry sliding condition, all three composites showed excellent wear resistance when lubricated by liquid paraffin. Under lubricated condition, Saffil/Al showed the best wear resistance among them, and its COF value was the smallest. The dominant wear mechanism of the composites under lubricated condition was microploughing, but microcracking also occurred to them to different extents. |
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