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Thermal and Oxidation Behavior of CoCrFeMnNi Alloy with and Without Yttrium Oxide Particle Dispersion
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SYSNO ASEP 0519520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermal and Oxidation Behavior of CoCrFeMnNi Alloy with and Without Yttrium Oxide Particle Dispersion Author(s) Vilémová, Monika (UFP-V) RID, ORCID
Illková, Ksenia (UFP-V)
Csáki, Štefan (UFP-V) ORCID
Lukáč, František (UFP-V) ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Chlup, Zdeněk (UFM-A) RID, ORCID
Klečka, Jakub (UFP-V) ORCIDNumber of authors 8 Source Title Journal of Materials Engineering and Performance. - : Springer - ISSN 1059-9495
Roč. 28, č. 9 (2019), s. 5850-5859Number of pages 10 s. Language eng - English Country US - United States Keywords high-entropy alloy ; mechanical-properties ; microstructure ; conductivity ; high-entropy alloys ; oxidation ; particle dispersion ; thermal conductivity ; thermal expansion ; thermal properties Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Physics of Materials - Metallurgy R&D Projects GA17-23964S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 ; UFM-A - RVO:68081723 UT WOS 000487912100053 EID SCOPUS 85074202809 DOI 10.1007/s11665-019-04311-9 Annotation The equiatomic CoCrFeMnNi alloy is currently one of the most studied high-entropy alloys. In our previous work, a new grade of CoCrFeMnNi high-entropy alloy with yttria-based particle dispersion was introduced showing improved mechanical properties, especially high-temperature strength and creep rate. In this study, a detailed analysis of room to high-temperature thermal properties was performed, as it is important for defining the future application of the alloy and opening the discussion on tailoring the thermal response. Thermal properties are not well known for the original CoCrFeMnNi alloy or for CoCrFeMnNi with yttria dispersion. As a result of the analysis, thermal properties of both alloys and the effect of the oxide dispersion are discussed. Most of the thermal properties remain unchanged. However, it was found that the presence of 0.3% yttria influences the oxidation rate of CoCrFeMnNi alloy at the initial and intermediate oxidation times. The onset of the oxidation is described in detail. Yttria nano-oxide dispersion and related grain refinement also reduce the microstructural degradation caused by the formation of voids due to outward Mn diffusion. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2020 Electronic address 10.1007/s11665-019-04311-9
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