铸造法制备CNTs／AM60镁基复合材料研究.pdf

学兔兔 Jan．2009 铸 造 Vo1．58 NO．1 FOUNDRY 铸造法制备CNTs／AM6O镁基复合材料的研究 周国华，曾效舒，袁秋红 (南昌大学机电工程学院，江西南昌330031) 摘要：采用搅拌铸造法制备了CNTs／AM60镁基复合材料，研究了搅拌法加入碳纳米管的工艺特点，测试了复合材料 的力学性能，并利用扫描电子显微镜和能谱分析对复合材料断口形貌进行观察和分析。研究结果表明，碳纳米管能细 化复合材料晶粒组织，且起搭接晶粒和承载变形抗力作用。与基体合金相比，复合材料抗拉强度、弹性模量、显微硬 度显著增加，伸长率最大可提高74．52％，但是碳纳米管加入量过多会导致偏聚，使力学性能下降。 关键词：AM60镁合金；碳纳米管；复合材料；力学性能 中图分类号：TG146．2*2 文献标识码：A 文章编号：1001—4977(2009)01—0043—04 Study on Carbon Nanotubes／AM60 Magnesium Matrix Com posites by Cast ZHOU Guo—hua，ZENG Xiao—shu，YUAN Qiu—hong (Mechanical＆Electronic College，Nanchang University，Nanchang 330031，Jiangxi，China) Abstract：Carbon nanotubes(CNTs)，AM60 magnesium matrix composites were fabricated by cast with stirring．and the characteris c of the stirring technology was studied．The mechanicaI properties of the composites were tested，and the fractographs were observed and analyzed via scanning electron microscope and onergY spectrum analysis．The results showed that C：NTs could not only refine the grains of the composites，but also overlap the grains and bear the resistance to deformation．Compared with the matrix alloy，the tensile strength，elastic modulus，and the micro．hardness of the composites had been enhanced significantly．Meanwhile．the elongation was greatly raised by 74。52％ at most．But the mechanicaI properties of the composites would felI down with excess addition of CNTs． Key words：AM60 magnesium alloy；carbon nanotubes；composites；mechanical properties 在不同应用场合，镁合金与钢铁、铝合金、工程 笔者通过搅拌铸造法制备碳纳米管增强镁基复合材料， 塑料等材料比，有轻质、高阻尼、抗振、高导热性、 分析制备工艺的特点，探讨碳纳米管的增强作用以及 抗电干扰、高电负性和易于回收等明显的优势。因