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Journal of Advanced Ceramics 2023, 12(6): 1258-1272 https://doi.org/10.26599/JAC.2023.9220755
Research Article | Open Access | Issue | Published: 29 May 2023

Fabrication of multi-anionic high-entropy carbonitride ultra-high-temperature ceramics by a green and low-cost process with excellent mechanical properties

Show Author's Information Liansen Xiaa,  Shun Donga( ),  Jianqiang Xinb,  Kaixuan Guic,  Peitao Hua,  Yongshuai Xiea,  Dongdong Yanga,  Xinghong Zhanga,  Yanchun Zhoud( )
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
Institute for Aero Engine, Tsinghua University, Beijing 100084, China
School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
Keywords:
mechanical properties, sol–gel, green synthesis, high-entropy (HE) carbonitride ceramics, multi-anionic structure
Cite this article:
Xia L, Dong S, Xin J, et al. Fabrication of multi-anionic high-entropy carbonitride ultra-high-temperature ceramics by a green and low-cost process with excellent mechanical properties. Journal of Advanced Ceramics, 2023, 12(6): 1258-1272. https://doi.org/10.26599/JAC.2023.9220755
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Abstract Full text About this article

As a new category of ultra-high-temperature ceramics (UHTCs), multi-anionic high-entropy (HE) carbonitride UHTCs are expected to have better comprehensive performance than conventional UHTCs. However, how to realize the green and low-cost synthesis of high-quality multi-anionic HE carbonitride UHTC powders and prepare bulk ceramics with excellent mechanical properties still faces great challenges. In this work, a green, low-cost, and controllable preparation process of (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)CxN1−x powders is achieved by sol–gel combined with the carbothermal reduction/nitridation method for the first time. The as-synthesized (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)CxN1−x powders possess high compositional uniformity and controllable particle size. In addition, the obtained bulk ceramics prepared at 1800 ℃ exhibit superior fracture toughness (KIC) of 5.39± 0.16 MPa·m1/2 and high nanohardness of 35.75±1.23 GPa, elastic modulus (E) of 566.70±8.68 GPa, and flexural strength of 487±41 MPa. This study provides a feasible strategy for preparing the high-performance HE carbonitride ceramics in a more environmentally friendly and economical manner.


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About this article

Fabrication of multi-anionic high-entropy carbonitride ultra-high-temperature ceramics by a green and low-cost process with excellent mechanical properties

Show Author's information Liansen Xiaa, Shun Donga( ), Jianqiang Xinb, Kaixuan Guic, Peitao Hua, Yongshuai Xiea, Dongdong Yanga, Xinghong Zhanga, Yanchun Zhoud( )
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China
Institute for Aero Engine, Tsinghua University, Beijing 100084, China
School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, China
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

Abstract

As a new category of ultra-high-temperature ceramics (UHTCs), multi-anionic high-entropy (HE) carbonitride UHTCs are expected to have better comprehensive performance than conventional UHTCs. However, how to realize the green and low-cost synthesis of high-quality multi-anionic HE carbonitride UHTC powders and prepare bulk ceramics with excellent mechanical properties still faces great challenges. In this work, a green, low-cost, and controllable preparation process of (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)CxN1−x powders is achieved by sol–gel combined with the carbothermal reduction/nitridation method for the first time. The as-synthesized (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)CxN1−x powders possess high compositional uniformity and controllable particle size. In addition, the obtained bulk ceramics prepared at 1800 ℃ exhibit superior fracture toughness (KIC) of 5.39± 0.16 MPa·m1/2 and high nanohardness of 35.75±1.23 GPa, elastic modulus (E) of 566.70±8.68 GPa, and flexural strength of 487±41 MPa. This study provides a feasible strategy for preparing the high-performance HE carbonitride ceramics in a more environmentally friendly and economical manner.

Keywords: mechanical properties, sol–gel, green synthesis, high-entropy (HE) carbonitride ceramics, multi-anionic structure

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Publication history
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Publication history

Received: 01 February 2023
Revised: 14 April 2023
Accepted: 16 April 2023
Published: 29 May 2023
Issue date: June 2023

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© The Author(s) 2023.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 52272060, 51902067, 51872066, and 52002001), Key Program of National Natural Science Foundation of China (No. 52032003), the China Postdoctoral Science Foundation (Nos. 2019M651282 and 2022T150157), the Heilongjiang Provincial Postdoctoral Science Foundation (Nos. LBH-Z19022 and LBH-TZ2207), Heilongjiang Touyan Innovation Team Program, the Shanghai Aerospace Science and Technology Innovation Fund (No. SAST2019-012), the Fundamental Research Funds for the Central Universities (No. FRFCU5710051022), the Science Foundation of National Key Laboratory of Science and Technology on Advanced composites in Special Environments (No. JCKYS2022603C011), Domestic Visiting and Studying Project for Outstanding Young Key Talents in Universities of Anhui Province (No. gxgnfx2021131), and Young and Middle-aged Top Talent Project of Anhui Polytechnic University.

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