| W掺杂NbSe2及其Cu基复合材料摩擦学性能研究 | |
| Investigation of W Doped NbSe2 and Tribology Characteristic of Its Correlated Copper Base Composites | |
| 摘要: 本文利用固相合成法制备W掺杂的NbSe2, 且以Nb1-xWxSe2为固体润滑相, Cu为基体相, 通过粉末冶金的方法制备出不同质量百分比含量的Nb1-xWxSe2/Cu基复合材料。利用XRD、SEM、TEM测试手段分析了样品中的相成分、微观形貌, 采用电阻率检测仪、材料试验机和排水法测试块体样品的电阻率、硬度和密度, 并用摩擦磨损试验机对其摩擦磨损性能进行评价。结果表明随着W掺杂量的增加, Nb1-xWxSe2的形貌由规则的微米六方片转变为纳米片和纳米带的混合, 掺杂对电阻率影响不大。随着Nb1-xWxSe2添加量的增加, Nb1-xWxSe2/Cu基复合材料的电阻率缓慢升高, 摩擦系数呈现不同规律变化。当Nb1-xWxSe2中W掺杂量x=0且其添加质量为10% 时, NbSe2/Cu基复合材料体系拥有最佳摩擦磨损性能, 摩擦系数为0.15, 磨痕平滑且宽度较窄。当Nb1-xWxSe2中W掺杂量x=3%且Nb0.97W0.03Se2的添加质量为5%时, Nb0.97W0.03Se2/Cu基复合材料拥有最佳摩擦磨损性能, 摩擦系数为0.17, 磨痕更加平滑且磨痕浅。这是由于Nb0.97W0.03Se2中同时均匀存在纳米带和纳米片, 它们互相缠绕在一起, 在复合材料中纳米片起到润滑成膜的作用, 纳米带类似于鸟巢中的草屑和树枝, 起到了增强增韧的作用, 促使材料的力学和摩擦学性能同时提高。 | |
| 关键词: NbSe2 W掺杂 Cu基复合材料 摩擦性能 润滑 | |
| 基金项目: 江苏省自然科学基金(No.BK2011534);兰州化学物理所固体润滑国家重点实验室开放基金(No.20101008);江苏省摩擦学重点实验室开放 基金(No.kjsmcx1005);江苏大学高级人才启动基金(No.09JDG009)资助项目。 | |
| Abstract: In this paper, W doped NbSe2 was prepared by solid phase synthesis method. Then Nb1-xWxSe2 copper base composites were synthesized by powder metallurgy method with a series of Nb1 -xWxSe2 concentration, using Nb1-xWxSe2 as solid lubrication phase and Cu as matrix phase. Phase identification and microstructure analysis of the resultant samples were carried out by XRD, SEM and TEM. The electrical resistance, hardness, and density of the block samples was measured with resistivity detector, electronic material testing machine and drainage method, respectively. The friction and wear performance was evaluated with friction and wear testing machine. It is found that the microstructure of Nb1-xWxSe2 changes from micron hexagonal sheet to the mixed of nanometer sheet and nanobelts with increasing W doping ratio. Whereas, there is nearly no influence on the resistance. Further, the resistivity of Nb1-xWxSe2/Cu base composites gradually becomes stronger as increasing the concentration of Nb1-xWxSe2, however, the friction coefficient exhibits different values. When x=0 and the percentage of Nb1-x WxSe2 is 10%, the NbSe2/Cu base composite presents the best friction and wear properties, i.e., the friction coefficient is 0.15 and wear scar is smooth and narrow. When x=3% and the percentage of Nb1-xWxSe2 is 5%, the Nb0.97W0.03Se2/Cu base composite presents the best friction and wear properties, i.e., the friction coefficient is 0.17 and wear scar is smoother and shallow. Since both nanobelts and nanosheet are existed in Nb0.97W0.03Se2 and they are intertwined, in the composites the nanosheets play an important role in the lubrication film and the winding nanobelts, which similar to the grass and branches of bird′s nest, enhance its toughening effect. Hence, both the mechanical and tribological properties of the composites are improved. | |
| Keywords: NbSe2 W-doped copper base composites tribology characteristic lubricate | |
| 投稿时间：2012-10-04 修订日期：2012-11-18 | |
| 摘要点击次数: 2067 | |
| 全文下载次数: 2409 | |
| 胡志立,李长生,唐华,李洪苹,梁家青,张毅,陈帅.W掺杂NbSe2及其Cu基复合材料摩擦学性能研究[J].无机化学学报,2013,29(4):767-773. | |
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