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Phase, composition and structure changes of CoCrNi-based concentrated alloys resulting from high temperature oxidation
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SYSNO ASEP 0531256 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phase, composition and structure changes of CoCrNi-based concentrated alloys resulting from high temperature oxidation Author(s) Vilémová, Monika (UFP-V) RID, ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Weiss, Zdeněk (FZU-D) ORCID
Lukáč, František (UFP-V) ORCID
Csáki, Štefan (UFP-V) ORCID
Chlup, Zdeněk (UFM-A) RID, ORCID
Matějíček, Jiří (UFP-V) RID, ORCID
Chráska, Tomáš (UFP-V) RID, ORCIDNumber of authors 8 Article number 2276 Source Title Materials. - : MDPI
Roč. 13, č. 10 (2020)Number of pages 13 s. Language eng - English Country CH - Switzerland Keywords Cr C dissolution 23 6 ; CrMnFeCoNi ; FeCoNiCr ; High-entropy alloys ; Medium-entropy alloys ; Oxide dispersion strengthening ; Passivation ; Spark plasma sintering ; Y-Ti complex oxide nanoparticles ; Y O particles 2 3 Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Physics - Solid Matter Physics ; Magnetism
Institute of Physics of Materials - MetallurgyR&D Projects GA17-23964S GA ČR - Czech Science Foundation (CSF) EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFP-V - RVO:61389021 ; FZU-D - RVO:68378271 ; UFM-A - RVO:68081723 UT WOS 000539277000068 EID SCOPUS 85085600793 DOI 10.3390/ma13102276 Annotation In this work, CoCrNi, FeCoCrNi and CoCrFeMnNi concentrated alloys with a Y-Ti oxide particle dispersion were prepared by mechanical alloying and Spark Plasma Sintering. The alloy consists of an FCC Ni-based matrix with a Y-Ti oxide dispersion and additional phases of Cr23C6 and Cr2O3. The effect of Fe, Mn, and Y-Ti oxide particles on the formation of oxide scales and the composition of the adjacent CoCrNi and FeCoCrNi alloys was studied. It was found that alloys without Mn in their composition form a protective Cr2O3 scale. The Cr23C6 particles provide an alternative mechanism for balancing the chromium loss during the oxidation. Y and Ti from the oxide particles participate in the formation of the protective oxide scales. Fe promotes Y and especially Ti diffusion through the Cr2O3 scale, resulting in the formation of Ti-depleted regions in the alloy. The findings will serve for the further development of these new materials. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://www.mdpi.com/1996-1944/13/10/2276
Number of the records: 1