Publication detail

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

VALÁŠEK, D. POUCHLÝ, V. SALAMON, D.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

VALÁŠEK, D.; POUCHLÝ, V.; SALAMON, D.

Released

1. 5. 2024

Publisher

ELSEVIER SCI LTD

Location

London

ISBN

1873-3956

Periodical

CERAMICS INTERNATIONAL

Year of study

50

Number

9

State

United Kingdom of Great Britain and Northern Ireland

Pages from

15367

Pages to

15372

Pages count

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="1873-3956",
  url="https://www.sciencedirect.com/science/article/pii/S0272884224004656?via%3Dihub"
}