Abstract
With the rapid development of aerospace and automobile industries, there is an increasing need for structural materials with excellent mechanical properties such as can be used at high temperatures. Aluminum matrix composite have attracted much attention because of its excellent performance, particularly the existence of the high temperature resistance inter-metallic compounds. Aluminum-based composites with inter-metallic compounds have been studied recently. In this study, Ni-Cr porous preform is reinforcement when Al-alloy (AC8A) is base metal and Ni-Cr/AC8A composites were manufactured under low pressure infiltration limited to the maximum of 0.5 Mpa at 700°C, 750°C, 800°C and 850°C, respectively. The microstructure and phase composition of the composites were evaluated by optical microscope, X-ray diffraction (XRD) and electro-probe micro analyzer (EPMA), intermetallic compounds Al3Ni and CrSi were found as newly formed phases in the composites. In addition, Vickers hardness of Ni-Cr composites was also tested.
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Recommended by Editor Jai Hak Park
Wonjo Park is born in 1952, graduated from Dong-A University with a Ph.D majored in Mechanical Engineering. In present, he holds a post as professor in Gyeong-Sang National University.
Wonjun Lee is born in 1985, graduated from Gyeongsang National University and has a Mechanical Engineering bachelor’s degree. Presently, he joined in the Energy Mechanical Engineering Master Course in Gyeongsang National University.
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Lee, W., Hwang, H., Kim, H. et al. The characteristics of intermetallic compounds and hardness of Ni-Cr/AC8A composites under different infiltration temperatures. J Mech Sci Technol 26, 2627–2630 (2012). https://doi.org/10.1007/s12206-012-0643-9
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DOI: https://doi.org/10.1007/s12206-012-0643-9