Taking AZ91D magnesium alloy as matrix and SiC particles with an average particle size of 10 μm and 10 nm as reinforcing phases,single-and double-size SiC particle-reinforced magnesium matrix composites were pre-pared by semi-solid state mechanical stirring method.The results reveal that the 2%SiCp/AZ91D composites with particle size of 10 nm achieve a tensile strength of 198 MPa and yield strength of 113 MPa,which is increased by 34.7%and 46.7%,respectively,and elongation reaches 6.4%,which is mainly attributed to the grain refinement effect of nano SiC particles.The fracture mechanism indicates that the cracks in the SiCp/AZ91D composite mainly propa-gate along the interface of micron SiCp-AZ91D.
NETL
NSTL
万方数据
