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采用盐浴镀的方法对SiC_P进行表面镀Ti处理,并通过搅拌铸造的方法制备了表面镀Ti改性SiC_P/Al2014复合材料。研究了镀Ti SiC_P的尺寸和体积分数对SiC_P/Al2014复合材料微观组织和力学性能的影响规律。结果表明:表面镀Ti处理能有效改善SiC_P在Al基体中的分散均匀性;但随着SiC_P体积分数提高,相同尺寸的镀Ti SiC_P在Al基体分散均匀性逐渐变差,当SiC_P体积分数相同时,其在Al基体中的分散均匀性随着SiC_P尺寸的增加逐渐变好。SiC_P尺寸相同时,SiC_P/Al2014复合材料的常温拉伸强度随颗粒体积分数的增加先增大后减小,SiC_P尺寸为5μm和10μm的SiC_P/Al2014复合材料抗拉强度在颗粒的体积分数为4%时达到最高,分别为524MPa和536MPa;SiC_P/Al2014复合材料的高温(493K)抗拉强度随着SiCp体积分数增加而增大,SiC_P尺寸为5μm和10μm的SiC_P/Al2014复合材料抗拉强度在颗粒体积分数为6%时达到最高,分别为308 MPa和320 MPa。
The surface treatment of SiC_P by salt bath plating was carried out on the surface of SiC_P. The surface modified Ti-modified SiC_P / Al2014 composites were prepared by stirring and casting. The effects of size and volume fraction of Ti SiC_P coated on the microstructure and mechanical properties of SiC_P / Al2014 composites were studied. The results show that the Ti plating on the surface can effectively improve the dispersion uniformity of SiC_P in Al matrix. However, with the increase of the volume fraction of SiC_P, the uniform distribution of Ti SiC_P with the same size on the Al matrix gradually deteriorates. When the SiC_P volume fraction is the same , Its dispersion uniformity in the Al matrix becomes better as the SiC_P size increases. SiC_P / Al2014 composites at room temperature tensile strength increases with the volume fraction of particles first increases and then decreases, SiC_P size of SiC_P / Al2014 5μm and 10μm composite tensile strength of the particles in the volume fraction of 4 %, Reached the maximum of 524MPa and 536MPa, respectively. The tensile strength at high temperature (493K) of SiC_P / Al2014 composites increased with the volume fraction of SiCp increasing. The tensile strength of SiC_P / Al2014 composites with SiC_P sizes of 5μm and 10μm The particles reached the highest volume fraction of 6% at 308 MPa and 320 MPa, respectively.