Hummers石墨烯添加量对镍基复合镀层摩擦学性能的影响
用电沉积法制备石墨烯镍基复合镀层，经过分析后复合镀层中含有石墨烯。石墨烯可以提高复合镀层的硬度，并且随着添加量的增加摩擦系数也在不断降低。随着石墨烯添加量的增加，硬度也在不断增加。而且随着沉积温度与沉积时间的增加，复合镀层的摩擦系数与硬度减小，摩擦磨损性能较好。
关键词 ： 石墨烯 改进Hummers法 电沉积法 摩擦磨损性能
毕业论文设计说明书外文摘要
Title Effect of Graphene Addition on the Tribological Performance of nickel-based Composite Coatings
Abstract
In this paper , chemical method was used to prepare the graphene sheets and double pulse electrodeposition process was used to prepare the graphene /nickel based composite coatings. Furthermore, the influence of graphene concentration on mechanical properties and friction and wear performance was discussed.By SEM, TEM, EDS, XRD , Raman spectra and FT-IR, it was found that: through improved hummers method with the hydrazine reduction method ,the graphene with quite good quality can be prepared.
The graphene /nickel based composite coatings could be prepared successfully by the double pulse electrodeposition process. And graphene exists in the composite coatings indeed. For the increase of composite coatings hardness and decrease of friction coefficient, graphene indeed play a role. With the increase of graphene addition, the hardness and lubricity of composite coatings were also improved.
And with the increasing of deposition temperature and deposition time, composite coatings reduce friction coefficient and hardness, good friction and wear properties.
Keywords graphene improved hummers method double pulse electrodeposition process friction and wear performance
目 次
1 引言 1
1.1 固体润滑剂概述 1
1.1.1 固体润滑剂 2
1.1.2金属基自润滑复合材料的润滑机理 2
1.1.3石墨烯与其他固体润滑剂 3
1.2 石墨烯概述 4
1.2.1石墨烯的摩擦润滑机理 5
1.2.2 石墨烯的性质 5
1.2.3 石墨烯的制备 5
1.2.4 石墨烯在减小复合镀层摩擦性能方面的应用 6
1.3 复合镀概述 7
1.3.1 化学沉积法 7
1.3.2 电沉积法 7
2 实验条件和方法 8
2.1 实验流程 8
2.2 实验材料和实验仪器 9
2.3 制备实验样品 11
2.4 摩擦磨损测试 12
2.5 石墨烯及其中间产物的表征 12
2.6 石墨烯/Ni复合镀层的表征 13
3 石墨烯及其中间产物的表征及物相分析 14
3.1 氧化石墨的表征及分析 14
3.1.1 氧化石墨的形貌 14
3.1.2 氧化石墨的物相分析 14
3.2石墨烯的表征及分析 16
3.2.1 石墨烯的形貌 16
3.2.2 石墨烯的物相分析 16
4 石墨烯/Ni复合镀层表征及其摩擦磨损性能 19
4.1 复合镀层表面形貌 19