碳纳米管对镁基材料的强韧化作用

对用搅拌铸造的方法制备的碳纳米管增强镁基复合材料进行了拉伸试验，并对其显微组织进行了观察和分析；同时，用TEM和EDS方法对碳纳米管涂覆层的界面结构和成分进行分析．试验结果表明：采用化学镀镍处理，可在CNTs表面获得均匀且结合力较强的涂覆层，改善其与基体的润湿和结合状况．CNTs对镁基材料具有较好的增强效果，且经过涂覆处理的CNTs，其增强效果更明显．在本试验条件下，CNTs能细化晶粒组织，提高复合材料的硬度和弹性模量．

The Obdurability of Magnesium Matrix Composite Reinforced with CNTs

Carbon nanotubes(CNTs) possess significant advantages such as super-strong mechanical prop erties and preferable heat-stability. So CNTs are considered as the perfect type for the novel composites. Tensile tests and microstruature of CNTs/Magnesium matrix composite, by the foundry method in Argon gas protection, were carried out. At the same time the interface structure and component of plating CNTs by TEM and EDS were analyzed. The experiment results show that uniform and firm binding plating coat in the CNTs surface can be acquired and the wettability and binding situation with the matrix can be im proved with the Nickel-plating treatment. The CNTs can function in strengthening perfectly. Further more, the plating CNTs are better than un-plating CNTs in strengthening effects. In the condition of this experiment, CNTs can refine the grain and increase the tensile strength and elongation ratio and the hard ness and the elastic modulus of the composites.