Advance on Al_2O_3 Particulates Reinforced Aluminum Metal Matrix Composites (Al-MMCs) Manufactured by the Power Metallurgy Techniques- Microstructure and Properties

摘要

Aluminum metal matrix composites (Al-MMCs) with Al_2O_3 particulates as reinforcement fabricated by the power metallurgy (PM) techniques have gained much attention due to their unique characteristics, which combine the roles of the process method, Al_2O_3 particles and aluminum matrix. The contents and sizes, locations and dispersion of Al_2O_3 particles on the matrix affect the mechanical behaviors and ultimate properties of the composites, which depend on microstructure of the final composites, usually including porosity, the grain size of composites and the dispersion of Al_2O_3 particle in the matrix. The agglomeration and segregation of the particles deteriorate the mechanical properties of composites.