Electrochemical Deposition of Ni–W Crack-Free Coatings
Source abstract
Abstract
The main features of electrochemical deposition of coatings based on Ni–W binary alloy in the pulse current mode using pyrophosphate electrolytes were studied. Two electrolytes with a pH of 8.7 and 9.5 were used. The deposition was carried out with the current density varying in the range of 0.01–0.1 A·cm−2, and the duty cycle (the relative pulse duration) was changed within the range 20–100%. The surface morphology and elemental and phase composition of the coatings were studied by scanning electron microscopy, energy-dispersive X-ray microanalysis and X-ray diffractometry. The experimental conditions allowing us to achieve the maximum Faradaic efficiency and W content in the coatings were determined. It was found that the pulse current mode enabled the fabrication of crack-free coatings with a thickness greater than 6 μm.
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Research context
OpenAlex topics: Electrodeposition and Electroless Coatings · Metal and Thin Film Mechanics · Metallurgical and Alloy Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Centre for Advanced Technologies and Materials, Ryazan State Radio Engineering University, Gagarin Str. 59/1, Ryazan 390005, Russia
Centre for Physics and Technological Research (CeFITec), Departamento de Física da Faculdade de Ciências e Technologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
Key Laboratory of Artificial Micro- and Nano-Materials of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
Funding
Ministry of Education and Science of the Russian Federation
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