复合电铸Ni-La_2O_3纳米复合材料的组织结构和性能  

Microstructure and Properties of Ni-La_2O_3 Nanocomposites Prepared by Composite Electroforming

作　　者：薛玉君[1] 朱荻[1] 靳广虎[1] 赵飞[1] 

机构地区：[1]南京航空航天大学机电工程学院,南京210016

出　　处：《中国机械工程》2004年第17期1569-1572,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目 ( 5 0 0 75 0 40 ) ;国防预研基金资助项目 (J15 0 0E0 0 2 ) ;高等学校博士学科点专项科研基金资助项目 ( 2 0 0 2 0 3 2 192 )

摘　　要：采用复合电铸工艺制备了不同La2 O3纳米颗粒含量的Ni-La2 O3纳米复合材料 ,用扫描电子显微镜和X射线衍射仪观察分析了纳米复合材料的表面形貌及组织结构 ,与电沉积纯镍作对比研究了纳米复合材料的显微硬度和耐磨损性能。结果表明 ,由于La2 O3纳米颗粒的存在 ,导致Ni -La2 O3纳米复合材料的组织结构发生了改变 ,它比纯镍沉积层具有更高的显微硬度及耐磨性 ,且La2 O3纳米颗粒质量分数越大 ,纳米复合材料的显微硬度越高 ,耐磨性越好。Ni-La 2O 3 nanocomposites with various La 2O 3 nanoparticles content were prepared by using the composite electroforming process. The microstructure and surface morphology of the nanocomposites had been examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Microhardness and wear resistance of the Ni-La 2O 3 nanocomposites were also evaluated in contrast with pure nickel deposit. The results show that the presence of La 2O 3 nanoparticles has significant effect on the microstructure of the Ni-La 2O 3 nanocomposites. As a result, the microhardness and wear resistance of the Ni-La 2O 3 nanocomposites are higher than those of the pure nickel deposit. Meanwhile, the nanocomposite exhibits higher microhardness and better wear resistance when the La 2O 3 nanoparticles content is increased.

关 键 词：复合电铸 LA2O3 纳米颗粒 纳米复合材料 显微硬度 耐磨性 

分 类 号：TG153.2[金属学及工艺—热处理] TH117.1[金属学及工艺—金属学]