Microstructure and Corrosion Resistance of In Situ Al_0.983Cr_0.017/Al Composites

Abstract:

In situ Al_0.983Cr_0.017 intermetallic compounds reinforced aluminum matrix composite was fabricated by the mechanical stirring casting method in this paper. In addition, microstructure and corrosion resistance of composite was investigated by XRD and SEM. The results show that the Al_0.983Cr_0.017 intermetallic compounds reinforcement distribute in the matrix uniformly. The clean interface between reinforcement and matrix has good interfacial bond. The corrosion resistance of Al_0.983Cr_0.017/Al composite materials presented a U-shaped curve, the best corrosion resistance present in the composite with 12% volume fraction reinforcement. The Al_0.983Cr_0.017 has a high corrosion resistance, which promoted the nucleation of pitting. Furthermore, the reinforcement interrupt the continuity of the matrix, inhibits the further expansion of pitting, which increases the corrosion resistance of composites.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 206-209
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.206
• Online since: June 2012
• Authors: Jian Zhang, Qiu Lin Wang, Bin Wan, Long Zhi Zhao
• Keywords: Aluminum Matrix Composite (AMC), Corrosion Resistance, In Situ Synthesis, Microstructure

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