Accessible Requires Authentication Published by De Gruyter May 26, 2013

Microstructure and Abrasion Wear Resistance of Thermally Sprayed Cermet Coatings

Mikrostruktur und abrasive Verschleißwiderstand von thermisch gespritzten Cermetbeschichtungen
Ion-Dragos Utu, Iosif Hulka and Viorel-Aurel Serban
From the journal Materials Testing


WC/10Co4Cr and WC/20CrC7Ni powders were sprayed onto the surface of low-carbon steel substrates using the high velocity oxygen fuel (HVOF) spraying method. Microstructure of the obtained coatings was evaluated by scanning electron microscopy (SEM). X-ray diffraction (XRD) analysis as well as hardness and porosity testing were performed on the samples. The abrasion wear resistance of the coatings was determined using the rubber wheel abrasion test. The mass loss rate (mg/h) of the samples was measured and the test results showed that the WC-CrC-Ni coating has better abrasion wear properties than the WC-CoCr coating.


WC/10Co4Cr und WC/20CrC7Ni Pulver wurden auf die Oberfläche von Stählen mit nierdigem Kohlenstoffgehalt mittels Hochgeschwindigkeitsflammspritzen (high velocity oxygenfuel (HVOF)) aufgebracht. Die Mikrostruktur der Beschichtungen wurde rasterelektronenmikroskopisch evaluiert. Röntgendiffraktionsanalysen sowie Härte- und Porösitätsmessungen wurden ebenfalls an den Proben durchgeführt. Der abrasive Verschleißwiderstand der Beschichtungen wurde mittels des Gummischeiben-Tests bestimmt. Die Massenverlustrate (mg/h) der Proben wurde gemessen und die Versuchsergebnisse zeigten, dass die WC-CrC-Ni Beschichtung bessere abrasive Verschleißeigenschaften aufweist als die WC-CoCr Beschichtung.

Ion-Dragos Utu, born 1978, had graduated from “Politehnica” University of Timisoara, Romania, as bachelor and PhD and is currently lector in the department of Materials and Manufacturing Engineering in the same institution being involved in the field of Material Science and Surface Engineering. He had developed remarkable research and teaching activity in Romania, as DAAD and is SOCRATES fellow in the University of Applied Sciences Gelsenkirchen, Germany.

Iosif Hulka, born 1985, graduated from “Politehnica” University of Timisoara, Romania, as bachelor and is currently PhD student in the department of Materials and Manufacturing Engineering.

Viorel-Aurel Serban, born 1954, graduated from “Politehnica” University of Timisoara, Romania, as bachelor as well as PhD and is currently professor of Materials Science. He is the rector of the “Politehnica” University of Timisoara. He had developed a remarkable research and teaching activity in Romania and as SOCRATES fellow in the University of Applied Sciences Gelsenkirchen, Germany and L’Institut Universitaire de Technologie A de Lille, France.


1 J. E.Cho, S. Y.Hwang, K. Y.Kim: Corrosion behaviour of thermal sprayed WC cermet coatings having various metallic binders in strong acidic environment, Surface and Coatings Technology200 (2006), pp. 26532662 Search in Google Scholar

2 F.Fischer, M.Dvorak, S.Siegmann: Development of ultra thin carbide coatings for wear and corrosion resistance, Themal Spray 2001 - New Surfaces for a Millenium, Singapore (2001), pp. 1131–1135 Search in Google Scholar

3 L.Zhao, M.Maurer, F.Fischer, R.Dicks, E.Lugschneider: Influence of spray parameters on the particle in-flight properties and the properties of HVOF coating of WC-CoCr, Wear 257(2004), pp. 41–46 Search in Google Scholar

4 I.Hulka, D.Utu, V. A.Serban: Comparison between the wear resistance behaviour of WC-CoCr coatings deposited by different HVOF torches, Proceeding of the 4th International Conference - Innovative technologies for joining advanced materials, pp. 318–321 Timisoara (2010), Romania Search in Google Scholar

5 Y. C.Zhu, K.Yukimura, C. X.Ding, P. Y.Zhang: Tribological properties of nanostructured and conventional WC-Co coatings deposited by plasma spraying, Thin Solid Films 388 (2001), pp. 277–282 Search in Google Scholar

6 K.Kumari, K.Anand, M.Bellacci, M.Giannozzi: Effect of microstructure on abrasive wear behaviour of thermally sprayed WC-10Co-4Cr coatings, Wear268 (2010), pp. 13091319 Search in Google Scholar

Published Online: 2013-05-26
Published in Print: 2013-01-01

© 2013, Carl Hanser Verlag, München