CuO表面改性SiC_p增强7075Al复合材料的组织性能

Microstructure and Mechanical Properties of 7075Al Composites Reinforced with CuO Modified SiC Particles

为了改善SiC_p与7075铝合金基体之间的润湿性,采用化学沉积法在SiC_p表面形成CuO包覆改性,通过挤压铸造工艺制备了改性SiC_p增强7075Al复合材料,并对复合材料的力学性能、显微组织进行分析。结果表明,SiC_p表面CuO改性是一种经济有效的,能提高SiC_p与7075铝合金基体间浸润性的表面改性方式。经改性处理后的SiC_p在基体中均匀分布。同时,改性SiC_p与基体结合良好,改性复合材料表现出较好的力学性能,抗拉强度达到378 MPa。

In order to improve the wettability between SiC particles and 7075 Al matrix alloy,copper oxide was formed on the surface of SiC particles by chemical deposition method.7075 Al composites reinforced by CuO modified SiC particles were prepared by squeeze casting technology.The microstructure and mechanical properties of the composites were analyzed.It is an economic and effective way that the SiC particles are modified with copper oxide on the surface by chemical deposition method to improve the wettability between SiC particles and 7075 Al matrix alloy.The modified SiC particles are uniformly distributed in the matrix alloy with a desirable interfacial bonding with the 7075 Al matrix alloy.In addition,the composites fabricated presents a good mechanical properties with tensile strength of 378 MPa.