中文摘要：

在不加表面活性剂的条件下，采用微波法制备碳纳米管负载组成可控的Cu1-Nix／MWCNTs（x=0．5，0．6，0．8）纳米复合材料，其结构和形貌通过XRD，TEM，SEM，EDX，FT—IR等技术进行表征，用VSM测试了材料的磁性能。结果表明：组成可控近似球形的Cu1-xNix合金纳米粒子均匀地负载在碳纳米管表面；Cu1-xNix合金为面心立方结构，当Ni含量增加时合金的晶格常数和粒径都逐渐减小；随着铜镍合金中Ni含量的增加，Cu1-xNix／MWCNTs复合材料的饱和磁化强度（M）增大，矫顽力（Hc）减小。另外，探讨了纳米复合材料的形成机理。

英文摘要：

Composition-controlled Cul-xNix/MWCNT nanocomposites （x = 0.5, 0.6, 0.8） were pre- pared by microwave-assisted method without using additional protective agents. The structure and morphology of the as-prepared nanocomposites were characterized by XRD, TEM, SEM, EDX and FT-IR spectroscopy. The magnetic properties were measured by VSM. The results show that Cul-x Nix alloy nanoparticles are face-centered cubic structure, quasi-spherical and disperse uniformly on the surface of MWCNTs. Both the lattice parameter and the size of Cul-xNix alloy nanoparticles decreased with increasing Ni content. The saturation magnetization （Ms） of Cu1-xNix/MWCNT nanocomposites increases whereas the coercivity （He） decreases with increasing Ni content. Moreover, a possible mechanism of formation was discussed.