Recently AA6061 has been used as the base alloy for the MMC's production. But its hardness and mechanical properties are better than the other base alloys.
Wear resistance of Al matrix composites is an important area of study with lot of potential applications. Among them 6xxx series alloys with SiC or alumina reinforcements are definitely the foremost. Though people study the tribological behavior of aluminium alloys (not composites), the aspect is more of academic interest.
Mostly aluminium alone cannot be used for tribological applications. As explained earlier, the ceramic particles is to be added to increase the wear resistance and can be used for the applications.