Manufacturing Process of Carbon-Alumina Short Fiber Hybrid Reinforced Aluminum Matrix Composites by Low Pressure Casting

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  • Choi Yongbum
    Graduate School of Engineering, Academy of Science and Technology, Mechanical Engineering Unit, Hiroshima University
  • Kataoka Yoshiki
    Department of Mechanical Materials Engineering, Hiroshima University
  • Zu Zhefeng
    Graduate School of Engineering, Academy of Science and Technology, Mechanical Engineering Unit, Hiroshima University
  • Matsugi Kazuhiro
    Graduate School of Engineering, Academy of Science and Technology, Mechanical Engineering Unit, Hiroshima University
  • Sasaki Gen
    Graduate School of Engineering, Academy of Science and Technology, Mechanical Engineering Unit, Hiroshima University

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<p>In this study, hybrid composites reinforced with Carbon short fibers and alumina short fibers were optimized using low-pressure casting. The total fraction of fibers in the composite was 10 vol%, with equal parts of Carbon short fibers and alumina short fibers (i.e., 5 vol% each). For comparison with the hybrid composites, two composites were separately reinforced with 10 vol% each of the Carbon short fibers and alumina short fibers. All the composites were fabricated using a low-pressure casting process by infiltrating molten Al (A1070) into a preform. Both types of short fibers were randomly distributed inside the Al matrix, and the low-pressure casting method achieved dense hybrid composite materials (over 98% relative density). The Vickers hardness and thermal conductivity of the composites were investigated.</p>

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