· Composites ·
K. Asano and H. Yoneda
Kinki University, Japan
67th World Foundry Congress
Magnesium alloy matrix composites reinforced with short alumina fibers and in-situ formed Mg2Si particles were fabricated in a permanent mold by the infiltration with the molten magnesium alloy into the preforms consisting of fibers having Si particles attached to their surfaces. P or CaF2 particles were used as the refiners of the Mg2Si particles. Fine Mg2Si particles of approximately 5μm grain size were formed due to the rapid solidification in the permanent mold, regardless of the introduction of the refiners. The tensile strengths of the composites that ranged from 293K to 623K were investigated. The strength of the alumina fiber-reinforced composite, in which the Mg2Si particles were homogeneously dispersed in the matrix, was higher than that of the conventional fiber-reinforced composite.
