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Preparation and properties of ultra-high temperature ceramics based on ZrC and HfC
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SYSNO ASEP 0360409 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Preparation and properties of ultra-high temperature ceramics based on ZrC and HfC Author(s) Brožek, Vlastimil (UFP-V) RID
Ctibor, Pavel (UFP-V) RID, ORCID
Dong-Ik, Ch. (KR)
Seong-ho, Y. (KR)
Mastný, L. (CZ)
Novák, M. (CZ)Source Title Solid State Phenomena - ISSN 1012-0394
Roč. 170, č. 1 (2011), s. 37-40Number of pages 4 s. Publication form web - web Action International Conference on Solid Compounds of Transition Elements SCTE/17th./ Event date 05.09.2010-10.09.2010 VEvent location Annecy Country FR - France Event type WRD Language eng - English Country CH - Switzerland Keywords Zirconium carbide ; hafnium carbide ; tungsten cermets ; hot pressing ; plasma spraying Subject RIV CA - Inorganic Chemistry CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000291703400010 DOI 10.4028/www.scientific.net/SSP.170.37 Annotation Successful preparation of massive compact bodies from ultra-high temperature ceramics like zirconium carbide, hafnium carbide and their cermets with tungsten matrix with high values of mechanical parameters is difficult. Only limited number of techniques is able to perform it because of their absolutely highest melting points. In our contribution the preparation of these materials by hot-pressing and plasma-spraying is described and chemical processes taking part at the processing are studied. Hot-pressed products fabricated at 2000°C and 6 GPa react with the internal surface of the BELT-type apparatus. Melting and sintering is taking place at plasma spraying. This process carried out by water stabilized plasma torch with centerline temperature up to 30000 K, is joined with undesirable reactions with plasma-forming medium, with oxidation in a turbulent plasma flow and nitridation of free-flight particles. All these chemical processes depend on variety of parameters Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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