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Plasma Spraying of Refractory Cermets by the Water-Stabilized Spray (WSP) System
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SYSNO ASEP 0336035 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Plasma Spraying of Refractory Cermets by the Water-Stabilized Spray (WSP) System Title Plazmové nástřiky vysokotavitelných kovokeramik pomocí plazmatronu s vodní stabilizací Author(s) Ctibor, Pavel (UFP-V) RID, ORCID
Brožek, Vlastimil (UFP-V) RID
Chráska, Pavel (UFP-V) RID
Cheong, D.-I. (KR)
Yang, S.-H. (KR)Source Title ITSC 2009 Proceedings from the 2009 International Thermal Spray Conference. - Las Vegas : ITSC Partner Societies, 2009 / Marple B.R. ; Hyland M.M. ; Lau Y.-C. ; Li C.-J. ; Lima R.S. ; Montavon G. - ISBN 978-1-61503-004-0 Pages s. 824-829 Number of pages 6 s. Publication form CD ROM 05271A - CD ROM 05271A Action Thermal Spray 2009: International Thermal Spray Conference Event date 04.05.2009-07.05.2009 VEvent location Las Vegas Country US - United States Event type WRD Language eng - English Country US - United States Keywords Plasma spraying ; refractory cermets ; tungsten cermets ; zirconium carbide 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 thermonuclear reactors 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. Bulk parts can be produced by powder metallurgy techniques but plasma spraying of cermets could be an interesting alternative. 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 of a thickness of about 1 mm were sprayed on various substrates, namely, graphite. Pure tungsten and pure ZrC were sprayed under similar conditions. Microhardness, surface roughness, XRD, XRF, dilatometry and spectroscopic techniques (Raman microspectroscopy) were used Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
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