Mechanical Properties of Carbon Nano-fiber Dispersed Frame-resistant Magnesium Alloy Prepare by Stir-casting Method

Abstract

0.5～1.0wt. % carbon nano-fiber (CNF) dispersed frame-resistant magnesium alloy was prepared by stir casting process. Starting materials were Mg-5wt%Al-3wt%Ca and VGCF as matrix and CNF. In order to disperse VGCF in alloy uniformly, Ni was coated on VGCF by electroless Ni plating before casting. As increasing VGCF contents, the microstructure of matrix in composites refined, but the aggregation of VGCF increased. As increasing VGCF content, hardness was increasing. On the other hand, the composites has high strength at 0.5wt. % VGCF composites. 0.5wt. % VGCF composites has higher proof strength and tensile strength than monolithic alloy.