【摘要】 采用激光烧结的方法制备了石墨烯增强镍基纳米复合材料,XRD和Raman测试结果表明,激光烧结后石墨烯存在于所制备的复合材料中,且石墨烯的结构和性能没有改变。显微硬度测试结果显示,石墨烯的添加使得石墨烯-镍纳米复合材料的硬度比激光烧结纯镍的硬度提高了约3倍。用电化学极化法研究了激光烧结的石墨烯-镍纳米复合材料和纯镍在3.5%Na Cl溶液中的腐蚀行为,石墨烯-镍纳米复合材料的腐蚀电位比激光烧结纯镍的腐蚀电位有所降低,且腐蚀电流也略有增大,说明其耐腐蚀性能较激光烧结纯镍有所下降。更多还原

【Abstract】 Graphene-nickel nanocomposites( Gr-Ni) had been successfully made by laser sintering. Microstructure and composition of the nanocomposites were studied by means of scanning electron microscopy( SEM),X-ray diffraction( XRD) and Raman spectroscopy. It is proved by XRD patterns and Raman spectrum that graphene nanoplatelets are dispersed in the nanocomposites. The Vickers hardness value of the laser sintered graphene-nickel nanocomposites is almost three times higher than that of the laser sintered nickel. The corrosion behavior of the laser sintered pure nickel and graphene nickel nanocomposites in 3. 5% Na Cl solution was studied by electrochemical polarization method. The result shows that the corrosion resistance of graphene nickel nanocomposites is decreased slightly than that of pure nickel.更多还原