Medium-entropy (Ti, Zr, Hf)2SC MAX phase

Ke Chen; Youhu Chen; Jianning Zhang; Yujie Song; Xiaobing Zhou; Mian Li; Xiaomeng Fan; Jie Zhou; Qing Huang

doi:10.1016/j.ceramint.2020.11.096

Medium-entropy (Ti, Zr, Hf)₂SC MAX phase

Ke Chen, Youhu Chen, Jianning Zhang, Yujie Song, Xiaobing Zhou, Mian Li, Xiaomeng Fan, Jie Zhou, Qing Huang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Medium- and high-entropy alloys or ceramics for tuning the physicochemical properties of materials by the combination of multiple principal elements have received much interest. Herein, a medium-entropy (Ti, Zr, Hf)₂SC phase was synthesized attributing to the structural and chemical diversity of MAX phases. The crystal structure of (Ti, Zr, Hf)₂SC was determined by the Rietveld refinement of XRD, SEM, and atom-resolved TEM along with EDS elemental analysis. Phase evolution of X-ray diffraction patterns and TG/DSC curves were employed to reveal the synthesis mechanism of (Ti, Zr, Hf)₂SC from 2TiC–Zr–ZrC-2HfH₂-3.2FeS reactant system. The Vicker's hardness and the electrical resistivity of (Ti, Zr, Hf)₂SC were found higher than those of Ti₂SC, but the thermal conductivity of (Ti, Zr, Hf)₂SC was lower.

Original language	English
Pages (from-to)	7582-7587
Number of pages	6
Journal	Ceramics International
Volume	47
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2020.11.096
State	Published - 15 Mar 2021

Keywords

(Ti, Zr, Hf)SC
Characterization
Medium-entropy MAX phase
Synthesis

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10.1016/j.ceramint.2020.11.096

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title = "Medium-entropy (Ti, Zr, Hf)2SC MAX phase",

abstract = "Medium- and high-entropy alloys or ceramics for tuning the physicochemical properties of materials by the combination of multiple principal elements have received much interest. Herein, a medium-entropy (Ti, Zr, Hf)2SC phase was synthesized attributing to the structural and chemical diversity of MAX phases. The crystal structure of (Ti, Zr, Hf)2SC was determined by the Rietveld refinement of XRD, SEM, and atom-resolved TEM along with EDS elemental analysis. Phase evolution of X-ray diffraction patterns and TG/DSC curves were employed to reveal the synthesis mechanism of (Ti, Zr, Hf)2SC from 2TiC–Zr–ZrC-2HfH2-3.2FeS reactant system. The Vicker's hardness and the electrical resistivity of (Ti, Zr, Hf)2SC were found higher than those of Ti2SC, but the thermal conductivity of (Ti, Zr, Hf)2SC was lower.",

keywords = "(Ti, Zr, Hf)SC, Characterization, Medium-entropy MAX phase, Synthesis",

author = "Ke Chen and Youhu Chen and Jianning Zhang and Yujie Song and Xiaobing Zhou and Mian Li and Xiaomeng Fan and Jie Zhou and Qing Huang",

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year = "2021",

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T1 - Medium-entropy (Ti, Zr, Hf)2SC MAX phase

AU - Chen, Ke

AU - Chen, Youhu

AU - Zhang, Jianning

AU - Song, Yujie

AU - Zhou, Xiaobing

AU - Li, Mian

AU - Fan, Xiaomeng

AU - Zhou, Jie

AU - Huang, Qing

PY - 2021/3/15

Y1 - 2021/3/15

N2 - Medium- and high-entropy alloys or ceramics for tuning the physicochemical properties of materials by the combination of multiple principal elements have received much interest. Herein, a medium-entropy (Ti, Zr, Hf)2SC phase was synthesized attributing to the structural and chemical diversity of MAX phases. The crystal structure of (Ti, Zr, Hf)2SC was determined by the Rietveld refinement of XRD, SEM, and atom-resolved TEM along with EDS elemental analysis. Phase evolution of X-ray diffraction patterns and TG/DSC curves were employed to reveal the synthesis mechanism of (Ti, Zr, Hf)2SC from 2TiC–Zr–ZrC-2HfH2-3.2FeS reactant system. The Vicker's hardness and the electrical resistivity of (Ti, Zr, Hf)2SC were found higher than those of Ti2SC, but the thermal conductivity of (Ti, Zr, Hf)2SC was lower.

AB - Medium- and high-entropy alloys or ceramics for tuning the physicochemical properties of materials by the combination of multiple principal elements have received much interest. Herein, a medium-entropy (Ti, Zr, Hf)2SC phase was synthesized attributing to the structural and chemical diversity of MAX phases. The crystal structure of (Ti, Zr, Hf)2SC was determined by the Rietveld refinement of XRD, SEM, and atom-resolved TEM along with EDS elemental analysis. Phase evolution of X-ray diffraction patterns and TG/DSC curves were employed to reveal the synthesis mechanism of (Ti, Zr, Hf)2SC from 2TiC–Zr–ZrC-2HfH2-3.2FeS reactant system. The Vicker's hardness and the electrical resistivity of (Ti, Zr, Hf)2SC were found higher than those of Ti2SC, but the thermal conductivity of (Ti, Zr, Hf)2SC was lower.

KW - (Ti, Zr, Hf)SC

KW - Characterization

KW - Medium-entropy MAX phase

KW - Synthesis

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DO - 10.1016/j.ceramint.2020.11.096

M3 - 文章

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SN - 0272-8842

VL - 47

SP - 7582

EP - 7587

JO - Ceramics International

JF - Ceramics International

IS - 6

ER -

Medium-entropy (Ti, Zr, Hf)₂SC MAX phase

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Keywords

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