Plasma Spraying and Characterization of Tungsten Carbide-Cobalt Coatings by the Water-Stabilized System WSP

0341118 - ÚFP 2010 RIV US eng J - Journal Article
Ctibor, Pavel - Kašparová, M. - Bellin, J. - Le Guen, E. - Zahálka, F.
Plasma Spraying and Characterization of Tungsten Carbide-Cobalt Coatings by the Water-Stabilized System WSP.
Advances in Materials Science and Engineering. Roč. 2009, - (2009), s. 1-11. ISSN 1687-8434. E-ISSN 1687-8442
R&D Projects: GA AV ČR 1QS200430560
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tungsten karbide – cobalt, cermet * wear resistance * abrasion * plasma spraying
Subject RIV: JG - Metallurgy
http://www.hindawi.com/journals/amse/2009/254848.html

Tungsten carbide-cobalt powders (WC-17wt% Co) were plasma sprayed by a water-stabilized system WSP. Experiments with variable feeding distances and spray distances were carried out. Thinner coatings were deposited on carbon steel substrates and thicker coatings on stainless steel substrates to compare different cooling conditions. 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 resistance 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 were discussed in connection with changes of phase composition and with the quality of the coating's microstructure.
Permanent Link: http://hdl.handle.net/11104/0184200