The Microstructure And Property Of In Situ TiC Particle Reinforced ZA43 Composites

In this paper, the development and research status of Zn-Al alloy, the making method and apply prospect of Zn-Al alloy base composites has been reviewed. Compared with the properties and making method of the other composites, it was fond that in-situ composites overcome the disadvantages of serious interface reaction, badly consistence and wetting, and will be a realistic making method for its easily operation and master.This paper has studied the making method of in-situ forming TiC particle as a emphasis to reinforce the ZA43 composites, observed and investigated the metallographic microstructure and dynamic properties, include the impact tenacity, hardness, strength, ductility, wear resistance, tensile strength and ductility at high temperature.The result demonstrate that compared with TiC particle as a emphasis to reinforce the ZA43 composits and ZA43 matrix ,its tensile strength .hardness ,wear resistence and the strength at high temperature all increased at some degree,but its impact tenacity and ductility reduced.This paper has investigated the effect of Rare earth and Re-Si alloy to the microstructure and properties of TiC particle to reinforce ZA43 composites. It was found that Rare earth can refine the matrix and the second phase, but too much Rare earth can turn second phase from block into spicula, so result in the decrease of mechanical properties of the composites.In addition, This paper has investigated a series of heat-treatment of the composites. The test results suggest that different heat-treatments have obvious effect to the microstructure and properties of ZA43 composites.