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PLASMA SPRAYING OF REFRACTORY CERMETS BY THE WATER-STABILIZED SPRAY (WSP®) SYSTEM
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SYSNO ASEP 0335339 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title PLASMA SPRAYING OF REFRACTORY CERMETS BY THE WATER-STABILIZED SPRAY (WSP®) SYSTEM Title Plazmové nástřiky vysokotavitelných cermetů pomocí plazmatronu s vodní stabilizací (WSP®) Author(s) Ctibor, Pavel (UFP-V) RID, ORCID
Brožek, V. (CZ)
Cheong, D.-I. (KR)
Chráska, Pavel (UFP-V) RIDSource Title Acta Technica CSAV. - : Ústav termomechaniky AV ČR, v. v. i. - ISSN 0001-7043
Roč. 54, č. 3 (2009), s. 241-253Number of pages 13 s. Language eng - English Country CZ - Czech Republic Keywords Plasma spraying ; cermet coatings ; microhardness ; zirconium carbide ; tungsten Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation Among important metal matrix composites are cemented carbides, predominantly tungsten carbide with cobalt binder. For high temperature applications, e.g., in nuclear or International thermonuclear reactor (i.e. nuclear fusion) technology, metals with a higher melting point, namely, tungsten, are preferred. Tungsten carbides with a decomposition temperature of 2785°C should also be replaced by, for example, ZrC. A mixture of W powder was prepared with 3 to 20 vol. % of ZrC. This feedstock having a spheroidal character was fed into the plasma of the water-stabilized plasma (WSP®) gun by means of an inert gas carrier. Coatings with thickness of about 1 mm were sprayed on graphite substrates with cylindric shape. Pure tungsten and pure ZrC were sprayed under similar conditions as the cermet. Microhardness, surface roughness, XRD, XRF, dilatometry and Raman microspectroscopy were used for the coatings characterization. ZrC coatings are hard and their elastic modulus is high. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
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