Abstract
Three kinds of coatings, Ni, Cu and Al 2O 3, were obtained on the surface of short carbon fibers (SCFs). The interface characteristics and mechanical properties of SCFs/Al composites with the various coatings were systematically studied in this paper. The results showed that, compared to non-coating, Ni or Cu coating improved the wettability of SCFs and Al melt. However, the harmful phases Al 3Ni or CuAl 2 generated in interface zone and Al matrix result in the lower mechanical properties. Al 2O 3 coating protected the SCFs and prevented the harmful reaction of Al and SCFs. The interface of Al/Al 2O 3/SCF without any other phase was clean and well bonded, and the Al 2O 3-coated SCFs/Al composite had the highest mechanical properties. The interfacial indentation and fracture mechanism of all the composites were analyzed in detail.
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