Synthesis of (HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

Xiang Liu; Youjun Lu; Qian Xu; Lutong Yang; Hongfang Shen; Wenzhou Sun; Xiao Zhang; Yanmin Wang

doi:10.26599/JAC.2023.9220705

Journal of Advanced Ceramics 2023, 12(3): 565-577 https://doi.org/10.26599/JAC.2023.9220705

Research Article |

Open Access | Issue | Published: 22 February 2023

Synthesis of (HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

Show Author's Information Hide Author's Information Xiang Liu^{^a}, Youjun Lu^{^a}(

), Qian Xu^{^a}, Lutong Yang^{^a}, Hongfang Shen^{^a}, Wenzhou Sun^{^a}, Xiao Zhang^{^a}, Yanmin Wang^{^a^,^b}

aSchool of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China

bCollege of Materials Science & Engineering, South China University of Technology, Guangzhou 510641, China

Keywords:

thermal reduction, soft mechanochemistry, high-entropy nitride powders, high-entropy nitride ceramics

Cite this article:

Liu X, Lu Y, Xu Q, et al. Synthesis of (HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance. Journal of Advanced Ceramics, 2023, 12(3): 565-577. https://doi.org/10.26599/JAC.2023.9220705

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Abstract

High-entropy nitride powders are one of prerequisite materials for the preparation of high-performance high-entropy nitride ceramics. In this paper, high-entropy (HfZrTiNbTa)N powders were synthesized via nitride (i.e., silicon nitride (Si₃N₄)) thermal reduction with soft mechano-chemical assistance. The results show that metal oxides like hafnium dioxide (HfO₂), zirconium dioxide (ZrO₂), titanium dioxide (TiO₂), niobium pentoxide (Nb₂O₅), and tantalum pentoxide (Ta₂O₅) can all be transformed into the corresponding metal nitrides in the presence of Si₃N₄ at 1700 ℃, and solid solution of the metal nitrides can be formed as the temperature increases to 2100 ℃. The high-entropy (HfZrTiNbTa)N powders with submicron-sized particles, a narrower size distribution, and a single face-centered cubic (fcc) structure are obtained from raw material mixtures ground for 10 h and subsequently sintered at 1800 ℃. In addition, the high-entropy bulk nitride ceramics with relative density (R_w) of 94.31%±0.76%, Vickers hardness of 21.00±0.94 GPa, and fracture toughness (K_IC) of 3.18±0.16 MPa·m^1/2 are obtained with submicron-sized powders, which are superior to those obtained with micron-sized powders.

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Synthesis of (HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

Show Author's information Hide Author's Information Xiang Liu^{^a}, Youjun Lu^{^a}(

), Qian Xu^{^a}, Lutong Yang^{^a}, Hongfang Shen^{^a}, Wenzhou Sun^{^a}, Xiao Zhang^{^a}, Yanmin Wang^{^a^,^b}

aSchool of Materials Science & Engineering, North Minzu University, Yinchuan 750021, China

bCollege of Materials Science & Engineering, South China University of Technology, Guangzhou 510641, China

Abstract

Keywords: thermal reduction, soft mechanochemistry, high-entropy nitride powders, high-entropy nitride ceramics

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Acknowledgements

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Publication history

Received: 28 September 2022

Revised: 06 December 2022

Accepted: 07 December 2022

Published: 22 February 2023

Issue date: March 2023

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51662002, 51762002, and 52104358), Graduate Student Innovation Program (No. YCX22138), and the Key Research and Development Program of Ningxia, China (No. 2019BFH02021).

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