Firstly

copper was deposited on carbon fibers.Boric acid was used to protect copper from oxidation and stir casting process was adopted to prepare short carbon fibers reinforced aluminum matrix composites.The microstructure of the interface in the composites was analyzed by using SEM，XRD and EDX.The results indicated that wettability was improved and excessive chemical reaction was restrained between carbon fiber and aluminum when copper was deposited on carbon fibers.Boric acid was used as a protecting agent to resolve the copper oxidation problem while compounding C/Al composites.There were large quantities of intermetallic compounds formed at the Cu/Al interface.And the C-Cu/Al interface was a mixed interface of C/Cu and C/Al.