Solidification microstructures of multielement carbides in the high entropy Zr-Nb-Hf-Ta-C-x system produced by arc melting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00543992" target="_blank" >RIV/61389021:_____/21:00543992 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/21:10248444

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1359646221003717?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1359646221003717?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scriptamat.2021.114091" target="_blank" >10.1016/j.scriptamat.2021.114091</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Solidification microstructures of multielement carbides in the high entropy Zr-Nb-Hf-Ta-C-x system produced by arc melting

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Solidification microstructures of multielement carbides in the high entropy Zr-Nb-Hf-Ta-C-x system produced by arc melting

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF18_053%2F0016925" target="_blank" >EF18_053/0016925: ÚFP - Mobilita II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scripta Materialia

ISSN

1359-6462

e-ISSN

1872-8456

Svazek periodika

203

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

114091

Kód UT WoS článku

000681318400011

EID výsledku v databázi Scopus

2-s2.0-85108651477