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

抄録

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.