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Electrophoretic‐Deposition of Graphene and Microstructure and Friction Behavior of Ni–Graphene Composite Coatings
Author(s) -
Dong Yaru,
Sun Wanchang,
Liu Xiaojia,
Ma Min,
Zhang Yagang,
Liu Yuwan
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900327
Subject(s) - materials science , graphene , electrophoretic deposition , microstructure , composite number , composite material , indentation , tribology , coating , indentation hardness , metallurgy , nanotechnology
Ni–graphene composite coatings with promising friction reduction and wear resistance are successfully deposited on magnesium alloys substrate by an integrative approach involved electrophoresis and pulse electrodeposition. The optimization parameters for electrophoretic deposition are explored extensively. The effect of duty cycle on microstructure, micro‐indentation hardness, friction, and tribological properties for Ni–graphene composite coatings are investigated. The Ni matrix exhibits most refined at 60% duty cycle according to surface micrographs of the Ni–graphene composite coatings. The cross‐section microstructure and line energy spectra proves that the Ni–graphene coating is deposited on the substrates successfully and is physically bonded to the substrates. The peak value of micro‐indentation hardness about 181.78 HV at 60% is achieved. The lowest friction coefficient and minimal wear loss of Ni–graphene composite coatings are obtained at 60% duty cycle, indicating optimal friction reduction and wear resistance performance.