Electrodeposition of Ni-Co-Fe2O3 composite coatings |
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Authors: | Li Ma Ke-chao Zhou Zhi-you Li and Qiu-ping Wei |
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Affiliation: | [1]Key State Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China [2]School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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Abstract: | Ni-Co-Fe2O3 composite coatings were electrodeposited using cetyltrimethylammonium bromide (CTAB)-modified Watt’s nickel bath with Fe2O3 particles dispersed in it. The effects of the plating parameters on the chemical composition, structural and morphological
characteristics of the electrodeposited Ni-Co-Fe2O3 composite coatings were investigated by energy dispersive X-ray (EDS) spectroscopy, X-ray diffractometry (XRD) and scanning
electron microscopy (SEM). The results reveal that Fe2O3 particles can be codeposited in the Ni-Co matrix. The codeposition of Fe2O3 particles with Ni-Co is favoured at high Fe2O3 particle concentration and medium stirring, and the deposition of Co is favoured at high concentration of CTAB. Moreover,
the study of the textural perfection of the deposits reveals that the presence of particles leads to the worsening of the
quality of the observed ?220? preferred orientation. Composites with high concentration of embedded particles exhibit a preferred
crystal orientation of ?111?. The more the embedded Fe2O3 particles in the metallic matrix, the smaller the sizes of the crystallite for the composite deposits. |
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Keywords: | electrodeposition Co-Ni alloy Fe2O3 particles composite coatings cetyltrimethylammonium bromide |
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