Wear behavior of electrodeposited nickel/graphene composite coating
| Autor: | Xuesha Li, Qianqian Shen, Yu Zhang, Chaoyin Nie, Lili Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Graphene Mechanical Engineering Composite number chemistry.chemical_element General Chemistry engineering.material Electronic Optical and Magnetic Materials law.invention Anode Nickel Coating chemistry law Materials Chemistry engineering Graphite Electrical and Electronic Engineering Composite material Electroplating Dispersion (chemistry) |
| Zdroj: | Diamond and Related Materials. 119:108589 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/j.diamond.2021.108589 |
| Popis: | The agglomeration of the doped graphene powder during electrochemical deposition and non-uniform dispersion in the nickel coating matrix are problems to be solved urgently. In order to solve these problems, a graphite flake was used for the anode, and on the basis of Watt's type electroplating solution, sulfuric acid was introduced to strip the graphite. Since the electroplating solution can peel graphene, the anodic peeling and cathodic deposition of graphene can be realized simultaneously, and the nickel/graphene composite coating can be obtained. The results showed that the exfoliated graphene (EG) was uniformly dispersed in the coating without agglomeration, which exhibited a typical wrinkled double-layer structure. The addition of graphene changed the preferred orientation of nickel from (200) to (111), the crystal grains were refined, and the performance was significantly improved. The microhardness of the nickel coating was increased from 186 HV to 330 HV, the friction coefficient was reduced to 0.16, and the wear rate was only 3.2 × 10−5 mm3 (N·m)−1. This research provides a new idea to solve the problem of graphene agglomeration and uniform dispersion in the electrolyte and coating and offers a new solution for the efficient preparation of nickel/graphene composite coatings with uniform graphene dispersion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect