热处理对SiC-Al-Mg复合材料性能的影响

【作者】 吴超； 孙爱芝； 贾成厂； 刘博文； 周川；

【机构】 北京科技大学新材料技术研究院；

【摘要】 本文采用放电等离子体烧结(Spark Plasma Sintering,以下简称SPS)制备了含纳米Si Cp(平均粒径为40 nm)质量分数分别为0%、0.5%和1%的Si Cp/Al-Mg复合材料,并对制备的复合材料进行了退火和固溶时效热处理;通过扫描电镜(SEM)对复合材料进行微观组织形貌的观察以及力学性能测试,研究了两种不同热处理方式对复合材料力学性能的影响规律。研究表明:固溶时效处理后质量分数为1%的Si C/Al-Mg复合材料的硬度和抗拉强度分别达到了70.6 HB和297 MPa,比未处理前的复合材料提高了13.3%和15.7%,比相同温度下退火处理的复合材料的硬度和强度也要高,固溶时效的热处理效应要优于退火的热处理效应。更多还原

【Abstract】 In this paper,Si Cp/Al-Mg composites with nano-Si Cp(average particle size 40 nm) mass fraction of 0%、0.5% and 1% were prepared by spark plasma sintering(hereinafter referred to as SPS).The effects of two different heat treatment methods on the prepared composites. The microstructure and mechanical properties of the composites were investigated by scanning electron microscopy(SEM). The results show that the hardness and tensile strength of Si C/Al-Mg composites with the mass fraction of 1% are 70.6 HB and 297 MPa respectively, which is 13.3% and 15.7% higher than that of the untreated composites. The hardness and strength of the composites annealed at the same temperature are higher than those of the annealing materials. The heat treatment effect of the solution is better than that of the annealing.更多还原