The effect of pressure tuning on the structure and mechanical properties of high-entropy carbides

Shixue Guan; Weitong Lin; Hao Liang; Wenjia Liang; Yi Tian; Duanwei He; Fang Peng

doi:10.1016/j.scriptamat.2022.114755

The effect of pressure tuning on the structure and mechanical properties of high-entropy carbides

Shixue Guan^*, Weitong Lin, Hao Liang, Wenjia Liang, Yi Tian, Duanwei He, Fang Peng

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

24 Citations (Scopus)

Abstract

High-purity (Ta_0.2Nb_0.2Hf_0.2Zr_0.2Ti_0.2)C high-entropy ceramics are successfully synthesized using high-pressure solid-phase reactions. The high-entropy phase formation route and the effect of pressure tuning on the structural and mechanical properties of the ceramics are systematically investigated. An interesting process is observed whereby a double phase high-entropy carbide is formed, followed by the defusing of one phase into another, and the eventual formation of a high-entropy phase. Moreover, an abnormal, pressure-induced enhancement of the bulk modulus and strength is observed, resulting from the crystal plane distortion in high-entropy carbides. These results reflect the unusual lattice distortion effects of continuous, pressure-induced tuning on the structure and properties of high-entropy carbides.

Original language	English
Article number	114755
Journal	Scripta Materialia
Volume	216
Online published	22 Apr 2022
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114755
Publication status	Published - 15 Jul 2022

Research Keywords

High-entropy carbides
High-pressure solid-state reaction
In-Situ high-pressure synchrotron radiation
Mechanical properties
Phase stability

Access Output

10.1016/j.scriptamat.2022.114755

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{f1461304879847b5b6c244bcef0fd73e,

title = "The effect of pressure tuning on the structure and mechanical properties of high-entropy carbides",

abstract = "High-purity (Ta0.2Nb0.2Hf0.2Zr0.2Ti0.2)C high-entropy ceramics are successfully synthesized using high-pressure solid-phase reactions. The high-entropy phase formation route and the effect of pressure tuning on the structural and mechanical properties of the ceramics are systematically investigated. An interesting process is observed whereby a double phase high-entropy carbide is formed, followed by the defusing of one phase into another, and the eventual formation of a high-entropy phase. Moreover, an abnormal, pressure-induced enhancement of the bulk modulus and strength is observed, resulting from the crystal plane distortion in high-entropy carbides. These results reflect the unusual lattice distortion effects of continuous, pressure-induced tuning on the structure and properties of high-entropy carbides.",

keywords = "High-entropy carbides, High-pressure solid-state reaction, In-Situ high-pressure synchrotron radiation, Mechanical properties, Phase stability",

author = "Shixue Guan and Weitong Lin and Hao Liang and Wenjia Liang and Yi Tian and Duanwei He and Fang Peng",

year = "2022",

month = jul,

day = "15",

doi = "10.1016/j.scriptamat.2022.114755",

language = "English",

volume = "216",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - The effect of pressure tuning on the structure and mechanical properties of high-entropy carbides

AU - Guan, Shixue

AU - Lin, Weitong

AU - Liang, Hao

AU - Liang, Wenjia

AU - Tian, Yi

AU - He, Duanwei

AU - Peng, Fang

PY - 2022/7/15

Y1 - 2022/7/15

N2 - High-purity (Ta0.2Nb0.2Hf0.2Zr0.2Ti0.2)C high-entropy ceramics are successfully synthesized using high-pressure solid-phase reactions. The high-entropy phase formation route and the effect of pressure tuning on the structural and mechanical properties of the ceramics are systematically investigated. An interesting process is observed whereby a double phase high-entropy carbide is formed, followed by the defusing of one phase into another, and the eventual formation of a high-entropy phase. Moreover, an abnormal, pressure-induced enhancement of the bulk modulus and strength is observed, resulting from the crystal plane distortion in high-entropy carbides. These results reflect the unusual lattice distortion effects of continuous, pressure-induced tuning on the structure and properties of high-entropy carbides.

AB - High-purity (Ta0.2Nb0.2Hf0.2Zr0.2Ti0.2)C high-entropy ceramics are successfully synthesized using high-pressure solid-phase reactions. The high-entropy phase formation route and the effect of pressure tuning on the structural and mechanical properties of the ceramics are systematically investigated. An interesting process is observed whereby a double phase high-entropy carbide is formed, followed by the defusing of one phase into another, and the eventual formation of a high-entropy phase. Moreover, an abnormal, pressure-induced enhancement of the bulk modulus and strength is observed, resulting from the crystal plane distortion in high-entropy carbides. These results reflect the unusual lattice distortion effects of continuous, pressure-induced tuning on the structure and properties of high-entropy carbides.

KW - High-entropy carbides

KW - High-pressure solid-state reaction

KW - In-Situ high-pressure synchrotron radiation

KW - Mechanical properties

KW - Phase stability

UR - http://www.scopus.com/inward/record.url?scp=85129258599&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85129258599&origin=recordpage

U2 - 10.1016/j.scriptamat.2022.114755

DO - 10.1016/j.scriptamat.2022.114755

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 216

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114755

ER -

The effect of pressure tuning on the structure and mechanical properties of high-entropy carbides

Abstract

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this