Mechanical Properties and Wear Resistance of Aluminium Alloy 6061 Composites Reinforced by Al2O3 Fiber and SiC Whisker

The mechanical properties and wear resistance of Al2O3 fiber and hybrid of Al2O3 and SiC whisker reinforced AA6061 were investigated.The elastic modulus of T6 heat treated Al2O3/6061 and Al2O3-SiC/6061 composites can be expressed as(This article is not displayable. Please see full text pdf.) \ oindentrespectively. The fiber arrangement coefficient α is found to be 0.7 for Al2O3 and 0.45 for SiC whisker.The wear resistance of Al2O3/6061 composites is inferior to that of SiC/6061 composites. The addition of small volume fractions of SiC whisker to Al2O3/6061 composites gives rise to remarkable improvement of the wear resistance which is, on the contrary, superior to that of SiC/6061 composistes.