Preparation of aluminum matrix composite reinforced with alumina particles by In-Situe method

الملخص EN

(liquid-gas) method were investigated.

Gas was represented by oxygen with flow rate 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 size and alumina volume fraction were studied extensively.

Resulted alumina was identified by using XRD and SEM techniques.

The resulted composites were characterized using density and hardness tests.

It is found generally, that the alumina particle size was (3 ± 1 μm), the density and hardness are decreases as the alumina particles weight percent increases.

The reason behind such behavior was the increment in porosity around alumina particles 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 like segregation, agglomeration and weak of wettability are occurred between the particles surface and matrix.