Plasma spraying and characterization of chromium carbide – nickel chromium coatings


Journal: Vol.9, No.4, autumn 2016 - Article 7   Pages :  281 Until 290



Article Code:
PCCC-2016-09-16-339

Authors:
P. Ctibor: Institute of Plasma Physics Academy of Sciences of the Czech Republic - Materials Engineering Department
M. Prantnerova: Research and Testing Institute Pilsen - Thermal Spray Division


Article's abstract:

Chromium carbide – nickel chromium powder Cr3C2-25wt.NiCr was plasma sprayed by a water-stabilized system WSP®. A series of experiments with variable feeding distance was carried out. Basic characterization of coatings was done by XRD, SEM and light microscopy plus image analysis. Microhardness was measured on polished cross sections. The main focus of investigation was on resistances against wear in dry as well as wet conditions. The appropriate tests were performed with set-ups based on ASTM G65 and G75, respectively. The influence of spray parameters onto coating wear performance was observed. The results of mechanical tests are discussed in connection with changes in the character of the coating’s microstructure. The results show that for obtaining the best possible Cr3C2-25NiCr coating with WSP® process, from the viewpoint of wear resistance, medium feeding distance is desired and its decrease or increase leads to certain worsening of studied properties.


Keywords:
Plasma spraying, Chromium carbide, Slurry abrasion, Dry rubber wheel test, Friction, Microhardness

References:
[1] I. Hussainova, J. Pirso, M. Antonov, K. Juhani, and S. Letunovits, Erosion and abrasion of chromium carbide based cermets produced by different methods, Wear, 263, 7-12 (2007) 905. [2] W. Zorawski, S. Skrzypek and J. Trpcevska: Tribological Properties of Hypersonically Sprayed Carbide Coatings, FME Transactions (Faculty of Mechanical Engineering, Belgrade, Serbia) 36 (2008) 81. [3] H. I. McClark, H.M. Hawthorne, and Y. Xie, Wear rates and specific energies of some ceramic, cermet and metallic coatings determined in the Coriolis erosion tester, Wear, 233–235(1999) 319. [4] J.F. Li, L. Li, C.X. Ding, Thermal diffusivity of plasma-sprayed Cr3C2–NiCr coatings, Mat. Sci. and Eng. A, 394 (2005) 229. [5] M.H. Staia, T. Valente, C. Bartuli, D.B. Lewis, C.P. Constable, A. Roman, J. Lesage, D. Chicot, and G. Mesmacque, Part II: tribological performance of Cr3C2-25% NiCr reactive plasma sprayed coatings deposited at different pressures, Surf. Coat. Technol., 146 –147 (2001) 563. [6] L. Fedrizzi, S. Rossi, R. Cristel, and P.L. Bonora, Corrosion and wear behaviour of HVOF cermet coatings used to replace hard chromium, Electrochimica Acta, 49 (2004) 2803. [7] J.Wang, L. Zhang, B. Sun, and Y. Zhou, Study of the Cr3C2-NiCr Detonation Spray Coating, Surf. Coat. Technol., 2000, 130, p 69-73 [8] S. Matthews, Development of high carbide dissolution/low carbon loss Cr 3 C 2 –NiCr coatings by shrouded plasma spraying, Surface


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ISSN:
2008-2134
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Publisher:
Institute for Color Science and Technology (ICST)

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