碳化硅颗粒增强铝基复合材料制备研究学士学位.doc

北方民族大学 学士学位论文 论文题目: 碳化硅颗粒增强铝基复合材料 制备研究 院(部)名 称: 材料科学与工程学院 学 生 姓 名: 郭杰 专 业: 材料科学与工程 学 号: 指导教师姓名: 陈文明(教授) 论文提交时间: 2011年5月11日 论文答辩时间: 2011年5月21日 学位授予时间: 北方民族大学教务处制 摘 要 ABSTRACT Since particles reinforced Al matrix composites show superior properties such as high strength at high temperatures,wear resistance,high specific rigidity and easy to process,they are paid more and more attention by the industry.Silieon carbide particle is a kind of high performance non-metallic oxide ceramic material,which has the advantages of high rigidity and wear-resistance,high temperature resistance and low cost,it is widely used as reinforced particles to produce metallic composites. This paper adopts powder metallurgy using microwave vacuum sintering process method of preparation of the excellent performance aluminum matrix composites. Sintering process through the different embedding way to the appearance of sintered body studies influence; Raw materials for the preparation of composite materials by the enhanced body surface oxidation and surface modification of copper, improved the enhance body and matrix wettability between to better solve the interface combination. And the physical properties of composite materials and mechanical properties were studied. By use of pressing body external coated layers of embedding way asbestos sintering can make sinter heat preservation effect better, exterior level off. Through the surface coating, can make the copper particles copper wrapped in silicon surface, improve the combination of silicon carbide and metal substrate. Research shows that, from 700 ℃ ~ 780 ℃, sintering temperature sintering temperature for best 740℃; Through the surface modification of silicon carbide powder enhance alum