Abstract
Ni-Co/Al2O3 composites with alumina particles below 0.53 µm in size were electrochemically deposited on carbon steel AISI-O1 substrates. The influence of current density (2, 3, 4 and 5 mA/cm2) on the microstructure and adhesion behavior was investigated. It was found that the micro-hardness of the surface increased in 90% with respect to the plain substrate. SEM examination revealed an increased thickness from 3.7 to 10.7 µm at current density of 2 and 5 mA/cm2, respectively. The Co/Ni weight ratio in the coatings was determined by atomic absorption spectroscopy (AAS); the content of Co and Ni at 2 mA/cm2 were 42.4 %Co and 57.6 %Ni, while at 5 mA/cm2 were 44.5%Co and 55.5%Ni. The adhesion of the coatings was evaluated qualitatively according to the VDI 3198 norm; in all the cases, the adhesion was more than acceptable since no cracks or detachments were observed in the periphery of the marks. Details on the synthesis and properties of the Ni-Co/Al2O3 composite coatings are presented together with the excellent properties they show despite of their thin thickness.
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Gül H., Kılıç F., Uysal M., Aslan S., Alp A., and Akbulut H., “Effect of particle concentration on the structure and tribological properties of submicron particle SiC reinforced Ni metal matrix composite (MMC) coatings produced by electrodeposition,” Applied Surface Science, vol. 258, pp. 4260–4267, 3/1/ 2012.
Wu G., Li N., Zhou D., and Mitsuo K., “Electrodeposited Co–Ni–Al2O3 composite coatings,” Surface and Coatings Technology, vol. 176, pp. 157–164, 1/1/ 2004.
Saha R. K. and Khan T. I., “Effect of applied current on the electrodeposited Ni–Al2O3 composite coatings,” Surface and Coatings Technology, vol. 205, pp. 890–895, 10/25/ 2010.
Vidakis N., Antoniadis A., and Bilalis N., “The VDI 3198 indentation test evaluation of a reliable qualitative control for layered compounds,” Journal of Materials Processing Technology, vol. 143–144, pp. 481–485, 12/20/ 2003.
Silva R.P., Eugeńio S., Silva T.M., Carmezim M.J. and Montemor M.F., “Fabrication of Three-Dimensional Dendritic Ni−Co Films By Electrodeposition on Stainless Steel Substrates”, The Journal of Physical Chemistry C, vol. 116, pp. 22425−22431, 2012.
Orinakova R., Turonova A., Kladekova D. and Galova M., and Smith R.M., “Recent developments in the electrodeposition of nickel and some nickel-based alloys”, Journal of Applied Electrochemestry, Vol. 36, pp. 957−972, 2006.
Goḿez E., Ramirez J. and Valleś E., “Electrodeposition of Co-Ni alloys”, Journal of Applied Electrochemestry, vol. 28, pp- 71–79, 1998.
Gyftou P., Pavlatou E. A., and Spyrellis N., “Effect of pulse electrodeposition parameters on the properties of Ni/nano-SiC composites,” Applied Surface Science, vol. 254, pp. 5910–5916, 7/15/ 2008.
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Alejo-Guerra, D., León-Patiño, C.A., Aguilar-Reyes, E.A. et al. Effect of Current Density on the Microstructure and Adhesion of Ni-Co/Al2O3 Composite Coatings. MRS Online Proceedings Library 1820, 67 (2016). https://doi.org/10.1557/opl.2016.67
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DOI: https://doi.org/10.1557/opl.2016.67