增强体结构对铜基复合材料力学性能的影响  

Effect of Reinforcement Structure on Mechanical Properties of Copper Matrix Composites

作　　者：武世文[1] 黎炳前 朱学宏 张福勤[1] WU Shi-wen;LI Bing-qian;ZHU Xue-hong;ZHANG Fu-qin(Key Laboratory of Light Weight and High Strength Structural Materials,Central South University,Changsha 410083,Hunan,China;School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学轻质高强结构材料重点实验室,湖南长沙410083 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2018年第5期126-130,共5页Mining and Metallurgical Engineering

基　　金：碳基复合XX材料应用技术研究(41422xxxxxx)

摘　　要：采用碳纤维无纬布/网胎毡针刺整体毡作为预制体,经过化学气相渗透和真空无压熔渗法制备出了碳纤维增强铜基复合材料。采用偏光显微镜和扫描电镜观察了材料的微观组织形貌,并探讨了增强体结构对复合材料的物理性能和力学性能的影响。研究结果表明,通过在1 220℃下真空熔渗0.5 h后,含钛锡青铜可以渗入碳纤维多孔预制体中,从而制备出致密的碳纤维增强铜基复合材料;相比于布毡比1∶1的复合材料,布毡比3∶1的复合材料硬度提升了17%,在垂直无纬布方向和平行无纬布方向的压缩强度分别提升了37%和44%,抗弯强度提升了47%。Carbon fiber reinforced copper matrix composites were fabricated by chemical vapor infiltration and vacuum pressureless infiltration with carbon fiber needled felt as preform. The mierostrueture of composites was observed by polarized light microscope and scanning electron microscope, and effect of reinforcement structure on physical and mechanical properties of the composites was also discussed. Results showed that alter infiltration at 1 220 ℃ for 0.5 h under vacuum pressure, titanium-tin bronze was infiltrated into the carbon fiber porous preform, thus a carbon fiber-reinforeed copper-based compact composite material was prepared. Compared to the sample prepared with non-woven fabric to felt at a ratio of 1 ： 1, the sample prepared at a ratio of 3 ： 1 had its hardness increased by 17%, the compressive strength perpendicular and parallel to the non-woven fabric increased by 37% and 44%, respectively, and the flexural strength increased by 47%.

关 键 词：碳纤维 化学气相渗透 真空无压熔渗 铜基复合材料 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]