Research on Microstructure and Mechanical Properties of SiCp/ZL104 Composites Fabricated by Compound Casting
The ZL104 composites reinforced by 20% SiCp(volume fraction)was fabricated by compound casting process,and the average diameterofSiC particleswasabout 15.8μm.The microstructure and mechanical properties ofthe samples prepared by SiCp/ZL104 Composites were researched.The test results show that there is a reasonable uniform dispersion ofparticlesin the matrix alloy,and the interface between reinforced particles and the matrix is thin with gradual changes of solute atom.The porosity,brinell hardness,tensile strength and elongation of the samples are 4.2%,76.2 HB,135MPa and 0.5% respectively.The tensile fractograph analysis show that the casting defects of apertures destroy the connection ofcomponentsin composites,the tensile fracture bringon the fracture ofthe matrix alloy.