Preparation of Aluminum Matrix Composite Reinforced with Alumina Particles by In- Situe Method

Abstract

In this work an Aluminum matrix composite reinforced with alumina prepared by insitu(liquid-gas) method were investigated. Gas was represented by an oxygen with flowrate 50, 100, and 150 Sml/min (Standard mile Liter/minute) at different temperature(720, 740, 760 and 780 °C). The effects of reaction temperature on alumina particle sizeand alumina volume fraction were studied extensively. Resulted alumina was identifiedby using XRD and SEM techniques. The resulted composites were characterized usingdensity and hardness tests. It is found generally, that the alumina particle size was (3 ± 1μm), the density and hardness are decreases as the alumina particles weight percentincreases. The reason behind such behavior was the increment in porosity around aluminaparticles and also to the weakness in wettability between alumina and metal matrix.Furthermore, it is noted that, there are many problems need to be resolved likesegregation, agglomeration and weak of wettability are occurred between the particlessurface and matrix.