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Study on Ni/Cu Alloy Plating and Pure Nickel Electrodeposition in Magnetic Fields Open Access


Other title
Type of item
Degree grantor
University of Alberta
Author or creator
Wang, Tianfei
Supervisor and department
Weixing, Chen (Chemical and Materials Engineering)
Examining committee member and department
Jingli, Luo (Etsell, Thomas (Chemical and Materials Engineering)
Douglas, Ivey (Chemical and Materials Engineering)
Guohua, Chen ( Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology)
Thomas, Etsell (Chemical and Materials Engineering)
Department of Chemical and Materials Engineering
Materials Engineering
Date accepted
Graduation date
Doctor of Philosophy
Degree level
The processes of Ni/Cu electro-co-deposition and pure nickel electroplating in magnetic field have been investigated. Various techniques such as scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffractometer (XRD), and electrochemical characterization were used to determine the characteristics of electro-deposition. A reliable method has been developed to fabricate Ni/Cu coating film with uniform composition. The color of Ni/Cu deposits was found to be related to the residual stresses in the deposits, which could be altered by adjusting the pH level of the solution. The magneto-electrolytic deposition study found that MHD stirring in the bulk electrolyte has limited influence on the coating properties; however, MHD effect in the fluid boundary layer could modify the morphology and structure of the deposits. Three new models were proposed to interpret the underlying mechanisms on morphology and texture formation during nickel deposit in both parallel and vertical magnetic fields. The effect of the alternative magnetic field generated by spinning magnets on nickel deposition was also investigated and the coatings with better surface smoothness than static magnetic field had been achieved. The micro-hardness of the deposited nickel samples made in the absence and presence of magnetic field were evaluated. The hardness of the deposits can be well correlated to the surface roughness through a Hall-Petch-type relationship.
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