Influence of alumina percentage on hot deformation of aluminium-alumina matrix composite

摘要

Aluminium-alumina Al-Al2O3 metal matrix composites were fabricated using the powder metallurgy techniques and ex situ casting. Different reinforcement volume fractions were used, that is, 0, 6, 10 and 18 vol.-% Al2O3. The effect of percentage of alumina particles was investigated through hot tensile deformation conducted at 773 K temperature. Scanning electron microscopy was used to study the microstructure of the produced composite. The tensile strength of the Al-Al2O3 was found to improve as a function of reinforcement volume fraction. With the exception of Al-18 vol.-% Al2O3, the metal matrix composite showed better strength and behaviour at high temperature of the test than the unreinforced matrix.