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Journal of Advanced Ceramics 2023, 12(11): 2032-2040 https://doi.org/10.26599/JAC.2023.9220805
Research Article | Open Access | Issue | Published: 29 November 2023

Hot forging Nb4AlC3 ceramics with enhanced properties

Show Author's Information Ye Yua,  Shuai Fub,  Detian Wanb,  Yiwang Baob,  Longsheng Chua,  Qingguo Fenga,  Chunfeng Hua( )
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
Keywords:
microstructure, anisotropy, texture, properties, Nb4AlC3
Cite this article:
Yu Y, Fu S, Wan D, et al. Hot forging Nb4AlC3 ceramics with enhanced properties. Journal of Advanced Ceramics, 2023, 12(11): 2032-2040. https://doi.org/10.26599/JAC.2023.9220805
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Abstract Full text Electronic supplementary material About this article

Textured Nb4AlC3 ceramics were rapidly and efficiently prepared by hot forging through spark plasma sintering (SPS). The longitudinal compression ratio of textured Nb4AlC3 ceramics was −78.3%, and the lateral expansion ratio was 32.1%. The grains grew preferentially along the direction perpendicular to the c-axis, forming the texture microstructure. The Lotgering orientation factor f(00l) was calculated to be 0.63. The thermal conductivity of textured Nb4AlC3 ceramics along the c-axis direction (11.23 W·m−1·K−1) (25 ℃) was lower than that of untextured ceramics (13.75 W·m−1·K−1) (25 ℃). The electrical conductivity perpendicular to the c-axis direction reached 4.37×106 S·m−1 at room temperature. The ordered layered grains increased the resistance of crack propagation, resulting in a higher fracture toughness parallel to the c-axis direction (9.41 MPa·m1/2), which was higher than that of untextured ceramics (6.88 MPa·m1/2). The Vickers hardness tested at 10 N on the texture top surface (7.18 GPa) was higher than that on the texture side surface (6.45 GPa).


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Electronic supplementary material
About this article

Hot forging Nb4AlC3 ceramics with enhanced properties

Show Author's information Ye Yua, Shuai Fub, Detian Wanb, Yiwang Baob, Longsheng Chua, Qingguo Fenga, Chunfeng Hua( )
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

Abstract

Textured Nb4AlC3 ceramics were rapidly and efficiently prepared by hot forging through spark plasma sintering (SPS). The longitudinal compression ratio of textured Nb4AlC3 ceramics was −78.3%, and the lateral expansion ratio was 32.1%. The grains grew preferentially along the direction perpendicular to the c-axis, forming the texture microstructure. The Lotgering orientation factor f(00l) was calculated to be 0.63. The thermal conductivity of textured Nb4AlC3 ceramics along the c-axis direction (11.23 W·m−1·K−1) (25 ℃) was lower than that of untextured ceramics (13.75 W·m−1·K−1) (25 ℃). The electrical conductivity perpendicular to the c-axis direction reached 4.37×106 S·m−1 at room temperature. The ordered layered grains increased the resistance of crack propagation, resulting in a higher fracture toughness parallel to the c-axis direction (9.41 MPa·m1/2), which was higher than that of untextured ceramics (6.88 MPa·m1/2). The Vickers hardness tested at 10 N on the texture top surface (7.18 GPa) was higher than that on the texture side surface (6.45 GPa).

Keywords: microstructure, anisotropy, texture, properties, Nb4AlC3

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Publication history

Received: 09 July 2023
Revised: 05 September 2023
Accepted: 05 September 2023
Published: 29 November 2023
Issue date: November 2023

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© The Author(s) 2023.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (52072311 and 52032011).

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