Comparison between the microstructural, morphological, mechanical and tribological characteristics of nanocrystalline Ni and Ni-Co electrodeposited coatings
Journal Title: Journal of New technology and Materials - Year 2017, Vol 7, Issue 1
Abstract
For improving the wear resistance of steel used commonly in industry, nanocrystalline nickel and nickel-cobalt coatings are electrodeposited on A60 steel substrate in a modified Watts bath. The observation of the coatings produced by scanning electron microscopy (SEM) shows that nickel coatings have a smooth morphology whereas Ni-Co alloy deposits have a lens-shaped morphology with a considerable increase in the grains size of Ni-Co alloy deposits. The results of XRD show that nickel coatings having fcc phase structure while Ni-Co coatings have hcp phase structure. The study of coatings micro-hardness indicates that the latter follows Hall Petche effect where nickel deposits which have the smallest grain size show a higher micro-hardness in comparison with Ni-Co coatings. Pin on disk tribometric analysis under unlubricated conditions illustrates a great improvement of the wear resistance by the addition of cobalt on nickel coatings, where the friction coefficient and the wear rates are significantly reduced in Ni-Co coatings compared with nickel coatings.
Authors and Affiliations
M. Hamidouche, N. Khennafi-Benghalem
Keywords
Related Articles
- EP ID EP260106
- DOI -
- Views 53
- Downloads 0
Zeolite ZSM-5 as a filler for pvc membranes used for the removal of iron and copper from aqueous solutions
In this study, a polyvinyl chloride (PVC) membrane impregnated with the zeolite ZSM-5 was used to remove Fe2+ and Cu2+ ions from aqueous solutions. The results obtained by X-ray diffraction (XRD), scanning electron micro...
Characterization of bioactive compounds in South-Western Algeria propolis samples
The prepared aqueousextract of propolis samples, which are harvested in Rebahia (Saida, Algeria), were analyzed by gas chromatography-mass spectrometry (GC / MS) to provide 50 volatile bioactive compounds. The major comp...
Effectof aluminum carbide additives on carbothermic reduction process from alumina to aluminum
In terms of electricity consumption, the carbothermic reduction process of alumina (Al2O3) represents one of the promising candidates to overcome the current industrial Hall-Héroult process for the production of aluminum...
Electrodeposition and characterization of Zns nanostructures for solar cells application
In the last few years, metal oxides nanostructures have attracted quickly increasing attention, due to their very interesting properties .Among them, Zinc sulfide (ZnS) semiconductor is an appropriate candidate as window...
Study of PVDF/PMMA blend resistance to artificial aging and neutral spray
The resistance of poly (vinylidene fluoride)/poly (methyl methacrylate) (PVDF/PMMA) blends was investigated using the artificial aging and neutral salt spray tests. The solution of each polymer was prepared using the N,...