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Open AccessArticle

Microstructure, Microhardness, and Wear Properties of Cobalt Alloy Electrodes Coated with TiO2 Nanoparticles

1
Faculty of Technical Sciences, University of Novi Sad, 21000 Novi Sad, Serbia
2
Faculty of Technology, University of Novi Sad, 21000 Novi Sad, Serbia
3
Department of Material Science, Technical University of Liberec, Liberec 461 17, Czech Republic
4
Lukasiewitz- Research Network-Institute of Advanced Manufacturing Technology, Centre for Materials Research and Sintering Technology, 30-011 Krakow, Poland
*
Authors to whom correspondence should be addressed.
Metals 2019, 9(11), 1186; https://doi.org/10.3390/met9111186
Received: 27 September 2019 / Revised: 22 October 2019 / Accepted: 23 October 2019 / Published: 4 November 2019
(This article belongs to the Special Issue Metal Oxides)
In this paper, the influence of TiO2 nanoparticle coating on cobalt-based electrodes was studied. Different coating treatment times were applied, and the results were compared to the hard-faced layer obtained with unmodified electrodes. The hard facing was done in three layers, the first being a Ni-based interlayer, followed by two layers of corrosion and wear-resistant Co-based Stellite 6 alloy. Pin-on-disc wear testing was applied, along with the metallographic study and hardness measurements of the hard-faced layers. Furthermore, energy-dispersive X-ray spectroscopy (EDS) analysis was conducted. It was found that the microstructural properties, as well as microhardness profiles, are modified in hard-faced layers obtained with modified electrodes. Interdendritic distances are altered, as are the dendrite growth directions. Titanium oxides are formed, which, along with the present complex carbides, increase the wear resistance of the hard-faced layers compared to layers obtained with untreated electrodes. View Full-Text
Keywords: hard facing; cobalt alloys; wear; nano-particle coating hard facing; cobalt alloys; wear; nano-particle coating
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MDPI and ACS Style

Balos, S.; Janjatovic, P.; Dramicanin, M.; Labus Zlatanovic, D.; Pilic, B.; Hanus, P.; Jaworska, L. Microstructure, Microhardness, and Wear Properties of Cobalt Alloy Electrodes Coated with TiO2 Nanoparticles. Metals 2019, 9, 1186.

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