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Solidification microstructures of multielement carbides in the high entropy Zr-Nb-Hf-Ta-C-x system produced by arc melting
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SYSNO ASEP 0543992 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Solidification microstructures of multielement carbides in the high entropy Zr-Nb-Hf-Ta-C-x system produced by arc melting Author(s) Biesuz, Mattia (UFP-V)
Saunders, T. G. (GB)
Veverka, Jakub (UFP-V) ORCID
Bortolotti, M. (IT)
Vontorová, J. (CZ)
Vilémová, Monika (UFP-V) RID, ORCID
Reece, M. J. (GB)Number of authors 7 Article number 114091 Source Title Scripta Materialia. - : Elsevier - ISSN 1359-6462
Roč. 203, October (2021)Number of pages 6 s. Language eng - English Country US - United States Keywords Arc melting ; High entropy carbides ; High entropy ceramics ; Refractory carbides ; Solidification Subject RIV JP - Industrial Processing OECD category Materials engineering R&D Projects EF18_053/0016925 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000681318400011 EID SCOPUS 85108651477 DOI 10.1016/j.scriptamat.2021.114091 Annotation Multielement, high entropy carbides are a new class of refractory materials typically manufactured by solid-state synthesis. Although high entropy alloys are usually produced by solidification of a melt, the solidification of high entropy carbides has not been investigated to date. Herein, we report the first arc melting study of the solidification microstructures of the Zr-Nb-Hf-Ta-Cx system. The results highlight the presence of elemental segregation in interdendritic regions whose composition depends on the carbon load (i.e., the composition of the primary solidification phase changes with the amount of carbon in the melt). Duplex microstructures containing two distinct multielement carbides, possessing hardness as high as 30 GPa, are obtained. Interestingly, under certain conditions, there is a perfect “crystallographic continuity” (no grain boundaries and cell parameter variations) between the two phases, though their composition differs. Arc melting produces new and exotic microstructures not observed in materials processed in the solid state. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S1359646221003717?via%3Dihub
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