Original title: Composites of titanium carbide with scandium matrix
Authors: Brožek, Vlastimil ; Pala, Zdeněk ; Vilémová, Monika ; Kubatík, Tomáš František ; Mušálek, Radek ; Nevrlá, Barbara ; Mastný, L.
Document type: Papers
Conference/Event: METAL 2014,International Conference on Metallurgy and Materials/23./, Brno (CZ), 2014-05-21 / 2014-05-23
Year: 2014
Language: eng
Abstract: First reference about existence of ultrahard composite in the TiC-ScCx system was made by G.V. Samsonov in the year 1962. Further research performed on ICT Prague and University of Vienna proved a discrepancy in the structure and stoichiometry of scandium carbide. Analogously to cubic carbides and nitrides of 3rd period metals, Scandium was also expected to have extreme hardness, high chemical stability and to enable solid solution formation (Vegard rule) with controlled regulation of physical parameters. Higher hardness of the cubic carbides is related to the decrease of lattice parameter, thus is was expected that smaller atomic radius of Sc in TixSc1-xC solid solution will lead to increase in hardness. However it was discovered that scandium carbide differs chemically as well as structurally, e.g. Sc15C19 is hydrolyzed and the product of the reaction is hydrogen, allylen and other hydrocarbons. Due to high price of Sc compounds, CVD and PVD layers of TiAlN or TiScAlN on sintered
Keywords: hard compounds; scandium oxycarbide; spark plasma sintering; titanium carbide
Host item entry: METAL 2014: 23rd International Conference on Metallurgy and Materials, conference proceedings, ISBN 978-80-87294-54-3
Note: Související webová stránka: www.metal.2014.com

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0234827

Permalink: http://www.nusl.cz/ntk/nusl-174842


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