Detail publikačního výsledku

Turning of high entropy alloy into high entropy carbides by modifying carbon content during reactive sintering

VALÁŠEK, D.; POUCHLÝ, V.; SALAMON, D.

Originální název

Turning of high entropy alloy into high entropy carbides by modifying carbon content during reactive sintering

Anglický název

Turning of high entropy alloy into high entropy carbides by modifying carbon content during reactive sintering

Druh

Článek WoS

Originální abstrakt

High entropy alloys containing equimolar multi-element composition enhance physical properties over traditional alloys. The concept was applied also for high entropy ceramics, but the solid-state reaction is necessary. In this work, high entropy alloy VNbMoTaW reacted with carbon to form high entropy carbide. Direct reaction in Spark Plasma Sintering (SPS) conditions leads to high entropy or entropy aided carbides depending on the amount of present carbon. The entropy aided carbide formed at low carbon concentrations below 0.8 of equimolar content contained all metallic elements, but two separated phases were identified: Nb, Ta or W, Mo rich. The microstructure of the entropy aided carbides is lamellar and refined compared to high entropy carbide (V 0.2 Nb 0.2 Mo 0.2 Ta 0.2 W 0.2 )C 0.8 . The presence of entropy aided carbide decreased the Vickers hardness from 23 GPa to 19 GPa, however, the unique microstructure might enhance other physical properties.

Anglický abstrakt

High entropy alloys containing equimolar multi-element composition enhance physical properties over traditional alloys. The concept was applied also for high entropy ceramics, but the solid-state reaction is necessary. In this work, high entropy alloy VNbMoTaW reacted with carbon to form high entropy carbide. Direct reaction in Spark Plasma Sintering (SPS) conditions leads to high entropy or entropy aided carbides depending on the amount of present carbon. The entropy aided carbide formed at low carbon concentrations below 0.8 of equimolar content contained all metallic elements, but two separated phases were identified: Nb, Ta or W, Mo rich. The microstructure of the entropy aided carbides is lamellar and refined compared to high entropy carbide (V 0.2 Nb 0.2 Mo 0.2 Ta 0.2 W 0.2 )C 0.8 . The presence of entropy aided carbide decreased the Vickers hardness from 23 GPa to 19 GPa, however, the unique microstructure might enhance other physical properties.

Klíčová slova

Spark plasma sintering; Carbides; High entropy; Phase transition; Hardness

Klíčová slova v angličtině

Spark plasma sintering; Carbides; High entropy; Phase transition; Hardness

Autoři

VALÁŠEK, D.; POUCHLÝ, V.; SALAMON, D.

Rok RIV

2025

Vydáno

01.05.2024

Nakladatel

ELSEVIER SCI LTD

Místo

London

ISSN

1873-3956

Periodikum

Ceramics International

Svazek

50

Číslo

9

Stát

Spojené království Velké Británie a Severního Irska

Strany od

15367

Strany do

15372

Strany počet

6

URL

https://www.sciencedirect.com/science/article/pii/S0272884224004656?via%3Dihub

BibTex

@article{BUT188806,
  author="Daniel {Valášek} and Václav {Pouchlý} and David {Salamon}",
  title="Turning of high entropy alloy into high entropy carbides by modifying carbon content during reactive sintering",
  journal="Ceramics International",
  year="2024",
  volume="50",
  number="9",
  pages="15367--15372",
  doi="10.1016/j.ceramint.2024.01.438",
  issn="0272-8842",
  url="https://www.sciencedirect.com/science/article/pii/S0272884224004656?via%3Dihub"
}