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Dry sliding friction and wear properties of A356/SiC composites against AISI D2 were analyzed by means of SEM,XRD and EDS.Results indicated that the wear rate of A356/SiC increased with increase of the applied load.Mild wear took place under lower load,transferring to severe wear at the load heavier than 400 N.Mechanical mixed layer(MML) formed on worn surface during dry sliding friction process,whose thickness became deeper with increasing load.Cracks formed easily in MML and spread transversely,resulting in peeling wear.The wear mechanism of the composite is that oxidation wear mechanism was dominant under low load,with the formation of tiny powdery debris.As the load enhanced,peeling wear was primary due to laminar debris detached from the MML,including oxidation and adhesive wear at the same time,with the load at 350-450 N,adhesive wear with irregular debris and peeling wear were predominant.
Dry sliding friction and wear properties of A356 / SiC composites against AISI D2 were analyzed by means of SEM, XRD and EDS. Results indicated that the wear rate of A356 / SiC increased with increase of the applied load. , transferring to severe wear at the load heavier than 400 N. Mechanistically mixed layer (MML) formed on worn surface during dry load friction. Cracks formed easily in MML and spread transversely, resulting in peeling wear The wear mechanism of the composite is that oxidation wear mechanism was dominant under low load, with the formation of tiny powdery debris. As the load enhanced, peeling wear was primary due to laminar debris detached from the MML, including oxidation and adhesive wear at the same time, with the load at 350-450 N, adhesive wear with irregular debris and peeling wear were predominant.