Tran, Van Hau and Phan, Van Trinh and Nguyen, Phuong Hoai Nam and Vu, Dinhh Lam and Phan, Ngoc Minh and Bui, Hung Thang
(2019)
Enhanced hardness of nickel coating reinforced functionalized
carbon nanomaterials via an electrodeposition technique.
Mater. Res. Express
.
Abstract
In this paper, the nickel (Ni) coatings reinforced carbon nanomaterials including graphene
nanoplatelets (GNPs), multi-walled carbon nanotubes (MWCNTs) andMWCNTs/GNPs hybrid
material prepared by the electrodeposition technique were investigated. GNPs andMWCNTswere
functionalized with carboxylic (–COOH) function groups (GNPs–COOH,MWCNTs–COOH) then
uniformly dispersed into Watts solution for the electrodeposition process. The obtained results
revealed that the microhardness of the Ni coating reinforcedCOOHfunctionalized carbon
nanomaterials is much improved compared to the bare Ni coating and Ni coating containing carbon
nanomaterials without functional groups. The Ni coating containingMWCNTs–COOH/GNPs–
COOHhybrid material showed the highest hardness value of 270HVthat is higher 44.7% compared
to the bare Ni coating. The enhancement was attributed to the uniform dispersion of functionalized
carbon nanomaterials in Ni matrix, the synergistic strengthening effect of theMWCNTsand GNPs,
the grain refinement of Ni matrix and the enhanced load transfer effect from Ni matrix toMWCNTs
and GNPs via atomic bonding during the electrodeposition process.
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