In this study, through the comparison of the microstructure evolution between composites and matrix alloy, the effects of nano-sized SiC particles (i.e. nano-SiC_p) on solution behavior and properties of 1 wt.% nano-SiC_p/Al-Cu composites were investigated for the first time. Results indicate that different from the traditional solution treatment process of Al-Cu matrix alloy, due to the hindering effect of nano-SiC_p on the solution behavior of Al₂Cu phase, the composites need higher solution temperature to show better mechanical properties. The T6 treated composites exhibit excellent hardness and tensile properties after solution treatment at 540 °C for 10 h. Its hardness, ultimate tensile strength and yield strength are 150 HV, 500 MPa and 350 MPa, which are increased by 120 %, 82 % and 106 % than that of the as-cast composites respectively. Compared with the T6 treated Al-Cu matrix alloy, the UTS and YS of nano-SiC_p/Al-Cu composites are elevated by 16.3 % and 34.6 %, respectively.

在这项研究中，通过比较复合材料和基体合金之间的微观结构演变，纳米尺寸的SiC颗粒（即nano-SiC _p）对1 wt。％nano-SiC _p / Al-Cu的溶液行为和性能的影响首次对复合材料进行了研究。结果表明，由于纳米SiC _p对Al ₂固溶行为的阻碍作用，与传统的Al-Cu基合金固溶处理工艺不同。铜相时，复合材料需要更高的固溶温度以显示更好的机械性能。经T6处理的复合材料在540°C固溶处理10 h后显示出优异的硬度和拉伸性能。其硬度，极限抗拉强度和屈服强度分别为150 HV，500 MPa和350 MPa，分别比铸造复合材料增加120％，82％和106％。与经T6处理的Al-Cu基合金相比，纳米SiC _p / Al-Cu复合材料的UTS和YS分别提高了16.3％和34.6％。