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Morphology and composition of Ni-Co electrodeposited powders

Authorized Users Only
2011
Authors
Maksimović, Vesna M.
Lačnjevac, Uroš
Stoiljković, Milovan
Pavlović, Miomir
Jović, Vladimir D.
Article (Published version)
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Abstract
The morphology, phase and chemical composition of Ni-Co alloy powders electrodeposited from an ammonium sulfate-boric acid containing electrolyte with different ratio of Ni/Co ions were investigated. The ratios of NVCo ions were 1/1, 1/2 and 1/3. The morphology, chemical composition and phase composition of the electrodeposited alloy powders were investigated using AES, SEM, EDS and XRD analysis. Composition of the electrolyte, i.e. the ratio of Ni/Co concentrations was found to influence both, the alloy phase composition and the morphology of Ni-Co alloy powders. At the highest ratio of Ni/Co = 1/1 concentrations typical 2D fern-like dendritic particles were obtained. With a decrease of NVCo ions ratio among 2D fern-like dendrites, 3D dendrites and different agglomerates were obtained. X-ray diffraction studies showed that the alloy powders mainly consisted of the face-centered cubic alpha-nickel phase and hexagonal close-packed alpha-cobalt phase and minor proportions of face-centere...d cubic alpha-cobalt phase. The occurrence of the latter phase was observed only in the alloy powder with the higher cobalt concentration in electrolyte. The electrodeposition of Ni-Co powders occurred in an anomalous manner.

Keywords:
Ni-Co powder / Electrodeposition / Morphology
Source:
Materials Characterization, 2011, 62, 12, 1173-1179
Publisher:
  • Elsevier Science Inc, New York
Projects:
  • Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-45012)

DOI: 10.1016/j.matchar.2011.09.001

ISSN: 1044-5803

WoS: 000298910800009

Scopus: 2-s2.0-80855139322
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/836
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IHTM

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