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| Microstructure and property of nanocrystalline Co--Ni alloy prepared by jet electrodeposition |
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| 燕山大学亚稳材料制备技术与科学重点实验室 |
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Cite this article:
;. Microstructure and property of nanocrystalline Co--Ni alloy prepared by jet electrodeposition. Chin J Mater Res, 2004, 18(5): 542-548.
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Abstract The influence of amount of CoSO$_{4}\cdot$6H$_{2}$O in electrolyte on chemical composition,
microstructure and property of nanocrystalline Co--Ni alloy deposit layers
prepared by jet electrodeposition was investigated. The results show that with
the increase of stirring intensity of the electrolyte, the thickness of diffused
layer decreases, the critical current density increases, and then the depositing
rates increase. At the same time, the increase of over--potential results in the
nucleating rate and the micro--hardness of deposits increasing, while the grain
size deposits decreasing. Co content in deposits increases with increasing the
Co$^{2+}$ content in electrolyte, which results in the change of the microstructures
in deposit layers from face--centered cubic $\alpha$--Co(Ni) to mixture of
face--centered cubic $\alpha$--Co(Ni) and hexagonal close--packed
$\varepsilon$--Co(Ni), and the change of morphology of surface of deposit layers.
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Received: 05 November 2004
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