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Microstructure and mechanical properties of magnesium composites prepared by spark plasma sintering technology |
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| Authors: | Wan Nur Azrina Wan Muhammad Zainuddin Sajuri Yoshiharu MutohYukio Miyashita |
| Affiliation: | a Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka-shi 940-2188, Japan b Department of Materials Engineering & Design, Faculty of Mechanical Engineering and Manufacturing, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia c Department of Mechanics and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia d Department of System Safety, Nagaoka University of Technology,1603-1 Kamitomioka, Nagaoka-shi 940-2188, Japan |
| Abstract: | Spark plasma sintering (SPS) technology was used to determine the appropriate conditions for SPS sintering of commercially pure magnesium as well as the magnesium alloy AZ31. It was found that the sintering temperatures of 585 °C and 552 °C were the most suitable sintering temperatures for the magnesium and the AZ31 alloy, respectively. Magnesium matrix and AZ31 alloy matrix composites reinforced with SiC particles were then successfully fabricated by the SPS method at sintering temperatures of 585 °C and 552 °C, respectively. A uniform distribution of SiC particles was observed along the boundary between matrix particles. The mechanical properties, i.e. hardness and tensile strength increased with increasing SiC content up to 10 wt%. However, when the SiC content was larger than 10 wt%, the tensile strength decreased due to the agglomeration of SiC particles. The agglomeration of SiC particles was found to lead to the degradation of the interfacial bonding strength between matrix and reinforcement. |
| Keywords: | Composite material Magnesium AZ31 alloy SiC particle Powder metallurgy Spark plasma sintering Mechanical properties |
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