Abstract
Metal-matrix composites (MMCs) are attracting considerable interest worldwide because of their superior mechanical and tribological properties. This study describes multifactor-based experiments that were applied to research and investigates Aluminum matrix composite reinforced with 5, 10 & 15 wt% Alumina particles. Mechanical mixing technique was used for fabrication. Sintering was carried out in a vacuum furnace at 600°C for 1 hr. The effects of Alumina percentage on the density, microstructure, both electrical & thermal conductivities, hardness and compression strength was investigated. The results showed that sample containing 5 wt% Alumina is near-fully dense. Also it has the highest hardness and compression strength.
Highlights
In the last decades, there is an increasing trend towards using composite materials, in order to achieve better performance in engineering materials [1]
AL2O3 is the most popular ceramic oxide that can be used as reinforcement due to its high stability at elevated temperatures that prevents its reaction with AL matrix [1]
Powder Characterization (Figures 1(a) and (b)), show the experimental results of the XRD pattern of pure AL and AL2O3 powders respectively, which indicate the appearance of AL and AL2O3 peaks with high intensity that indicates the purity of the raw materials. (Figures 2(a) and (b)), show that the particle diameter of AL and AL2O3 was 5 - 10, and 10 μm respectively
Summary
There is an increasing trend towards using composite materials, in order to achieve better performance in engineering materials [1]. Enormous researches focused on hard ceramic particulate, fiber and whiskers reinforced aluminum metal which causes a modification of strength, stiffness, hardness, wear and fatigue resistance specially at elevated temperature applications. Those improves corrosion resistance of the material, compared with conventional aluminum alloy [19,20,21,22]. Powder metallurgy is a good technique in producing MMCs. Its main advantage is the low processing temperature than the melting technique, so there is no interaction between the matrix and the reinforcement.
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