氧化还原法制备石墨烯及其对镍基镀层摩擦学性能影响

摘要本文采用化学还原法制备石墨烯薄片,采用双脉冲复合电沉积法制备镍基石墨烯复合镀层，同时研究镀液中石墨烯浓度对复合镀层的力学性能与摩擦磨损性能的影响。经过 SEM，TEM，EDS，XRD，Raman 和 FT-IR 等技术分析后发现：改进 Hummers 法结合肼还原法可以获得质量较好的石墨烯，用电沉积法可以获得镍基石墨烯复合镀层，而复合镀层中的确存在石墨烯。同时还利用电沉积法制备了镍基金刚石复合镀层，镍基碳纳米管复合镀层进行比较。石墨烯对于复合镀层的硬度提高和摩擦系数的降低起到一定的作用，随着石墨烯添加量的增加，硬度和减摩润滑效果也随之提高。当石墨烯添加量过多时，不利于复合镀层的制备，对力学性能和摩擦学性能也不好。68569

毕业论文关键词：石墨烯氧化还原法改进 Hummers 法自润滑摩擦磨损性能

Title Research on Graphene Preparation by RODEX and Its Influence on the Tribological Performance of Nickel-based coating

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. We also prepared nickel-based diamond composite coating, nickel-based carbon nanotube composite coatings for comparison in the same way . Graphene played a role in increasing the hardness and decrease of friction coefficient,. With the increase of grapheme amount, the hardness and lubricity of composite coatings were also improved. When the amount of graphene was superfluous, it was detrimental to the preparation of composite coatings , the mechanical property and tribological performance.

Keywords graphene RODEX improved hummers method Self lubricating friction and wear

1 引言 1

1.1 自润滑及复合镀层摩擦性能概述 1

1.2 石墨烯概述 2

1.2.1 石墨烯的性质及石墨烯复合材料 2

1.2.2 石墨烯的制备 3

1.2.3 石墨烯摩擦性能及石墨烯复合镀层耐磨性 3

1.3 研究目的和研究内容 4

2 实验条件和方法 6

2.1 主要实验流程氧化还原法制备石墨烯及其对镍基镀层摩擦学性能影响:http://www.751com.cn/cailiao/lunwen_77157.html