Effect of the silicon content and thermomechanical treatment on the dry sliding wear behavior of spray-deposited Al–Si/SiCp composites |
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| Affiliation: | 1. Biomaterials Unit, University of Birmingham School of Dentistry, College of Medical and Dental Sciences, St Chad''s Queensway, Birmingham B4 6NN, UK;2. Materials Science Unit, Division of Oral Biosciences, Dublin Dental University Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland;1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Leo-Brandt-Str. 1, D-52425 Jülich, Germany;2. Jülich Aachen Research Alliance – JARA Energy, Germany;1. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran;2. Center of Excellence for Advanced Materials, Iran University of Science and Technology, P.O. Box 16845-195, Tehran, Iran;3. Center of Excellence for High Strength Alloys Technology (CEHSAT), Iran University of Science and Technology, Tehran, Iran;1. Department of Civil and Materials Engineering, University of Malaga, C/Dr Ortiz Ramos s/n, 29071 Malaga, Spain;2. Department of Materials Science and Metallurgy Engineering, University of Jaen, Campus Las Lagunillas, 23071 Jaen, Spain;3. Jacobs Technology, NASA Johnson Space Center, Houston TX, USA;1. Department of Mechanical Engineering, Tontadarya College of Engineering, Gadag 582 101, India;2. Department of Mechanical Engineering, St. Joseph Engineering College, Mangalore 575 028, India;3. Metal Extraction and Forming Division, National Metallurgical Laboratory, Jamshedpur 831 007, India;4. Department of Mechanical Engineering, Basaveshwar Engineering College, Bagalkot 587 101, India |
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| Abstract: | In this study, The wear behaviors of spray-deposited Al–Si/SiC composites, with Si contents between 9 and 20% and 15 vol.% SiC particles, were investigated by using a ring-on-ring test at room temperature under dry conditions. The microstructures, morphologies and phases of worn surfaces were analyzed by scanning electron microscope (SEM) and energy-dispersive X-ray microanalysis (EDAX), respectively. In addition, the wear mechanisms of the composites with different silicon content were discussed. It has been found that the wear rate decreases with the increase of hardness of composites due to silicon content increasing. The wear resistances of the composites are improved dramatically through thermomechanical treatment, compared to as-sprayed composite, due to increasing hardness and elimination of porosity. The wear mechanisms of composites vary with silicon content from abrasive to oxidative wear. |
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