Microstructure of Magnesium-Aluminum Metal Matrix Composites Reinforced with 2wt.% SiC Particles

Abstract:

SiC_p/Mg-Al composites with 5μm 2wt.% SiC particles as reinforcement were prepared under the protection of inorganic flux. The microstructures, textures and components of the composites were investigated using optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and backscattered electron imaging (BSE). The results indicate that SiC particles are mainly distributed along grain boundaries, retarding grain growth and conducing to the refinement of the matrix. Interfacial reaction can occur between SiC_p and Mg but not between SiC_p and Al. There are α-Mg and β-Mg₁₇Al₁₂ phases, γ-MgAl phase, α-Al and β-Al₃Mg₂ phases in SiC_p/Mg-Al composites with the Mg/Al ratio of 4/1, 1/1, 1/4 respectively.

• Periodical: Advanced Materials Research (Volume 413)
• Pages: 207-212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.413.207
• Online since: December 2011
• Authors: Run Lan Zhang, Xiang Rong Liu, Tan Wei Zhou, Jian Li Yang
• Keywords: Aluminum (Al), Magnesium, Metal Matrix Composite (MMC), SiC_p/Mg-Al Composites

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