论文部分内容阅读
将CNTs、Se粉和Nb粉按一定化学计量比均匀混合,通过固相反应生成碳纳米管(CNTs)/NbSe2复合材料,然后以生成的CNTs/NbSe2复合材料为固体润滑相,Cu为基体相,通过粉末冶金的方法制备出了CNTs/NbSe2/Cu基自润滑复合材料。利用UMT-2摩擦磨损试验机对材料的摩擦磨损性能进行评价,结果表明NbSe2/Cu基自润滑复合材料具有较好的摩擦学性能,磨痕平滑;随着1%(质量比)CNTs的加入,CNTs/NbSe2/Cu基自润滑复合材料摩擦学性能更为优异,其磨痕更平滑。这是由于具有优异润滑性能的NbSe2和均匀弥散分布在Cu基体中的大长径比管状结构的CNTs一起起到了协同强化和减摩耐磨作用,最终导致材料的机械和摩擦学性能同时提高。
The CNTs, Se powders and Nb powders are uniformly mixed at a certain stoichiometric ratio to produce carbon nanotubes (CNTs) / NbSe2 composites by solid phase reaction, and then the resulting CNTs / NbSe2 composite materials are used as the solid lubricant phase. Cu is the matrix phase , CNTs / NbSe2 / Cu based self-lubricating composites were prepared by powder metallurgy. The friction and wear properties of the composites were evaluated by the UMT-2 friction and wear tester. The results show that the NbSe2 / Cu based composites have good tribological properties and smooth wear scar. With the addition of 1% (mass ratio) CNTs , CNTs / NbSe2 / Cu-based self-lubricating composite materials more excellent tribological properties, the wear marks more smooth. The reason is that NbSe2 with excellent lubricity and synergistic strengthening and anti-friction and anti-wear effect of CNTs with large diameter and tubular structure uniformly dispersed in Cu matrix ultimately lead to the simultaneous improvement of the mechanical and tribological properties of the material.