Fabrication of textured (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 high-entropy ceramics
Fabrication of textured (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 high-entropy ceramics
Textured high-entropy boride ceramics, prototypically (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2, with nearly single phase were fabricated for the first time by spark plasma sintering (SPS) of the corresponding powder, which was derived from boron/carbothermal reduction. Lotgering orientation factor calculation and the pole figures revealed that the c-axis of high-entropy boride grains aligned parallel to the SPS pressing direction after sintering and grains grew along the a,b-axis to form platelet-like morphology. The remarkably high Vickers’ hardness of ∼29 GPa was observed on both of the side surface and the top surface of textured ceramics. The surface perpendicular to the SPS pressing direction demonstrated an improved fracture toughness owing to the oriented elongated grains.
High-entropy boride ceramic, Mechanical properties, Microstructure, Texture
1015-1019
Zhang, Yan
1189aade-b69b-4ddc-b283-3d40987c3b23
Sun, Shi Kuan
b94aec0f-5a42-49b0-9a34-f295c4bf3cb9
Guo, Wei Ming
76679fc9-ba0c-46e0-8ca6-70dbe3be5815
Zhang, Wei
ba53c6cc-d95c-4e6b-a6e4-381ce699654f
Xu, Liang
0c850205-0b1c-4b82-8e7b-ab802302fd08
Yuan, Jin Hao
b71a173d-96f8-4a0e-9cc0-ed527620be89
Guan, Di Kai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Wang, Da Wei
859df69c-2201-4e29-a551-1c9f70fd7ae6
You, Yang
89092981-645b-441e-85dc-19c3a6528a34
Lin, Hua Tay
ee210d27-9062-41ad-8abb-be1117252766
January 2021
Zhang, Yan
1189aade-b69b-4ddc-b283-3d40987c3b23
Sun, Shi Kuan
b94aec0f-5a42-49b0-9a34-f295c4bf3cb9
Guo, Wei Ming
76679fc9-ba0c-46e0-8ca6-70dbe3be5815
Zhang, Wei
ba53c6cc-d95c-4e6b-a6e4-381ce699654f
Xu, Liang
0c850205-0b1c-4b82-8e7b-ab802302fd08
Yuan, Jin Hao
b71a173d-96f8-4a0e-9cc0-ed527620be89
Guan, Di Kai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Wang, Da Wei
859df69c-2201-4e29-a551-1c9f70fd7ae6
You, Yang
89092981-645b-441e-85dc-19c3a6528a34
Lin, Hua Tay
ee210d27-9062-41ad-8abb-be1117252766
Zhang, Yan, Sun, Shi Kuan, Guo, Wei Ming, Zhang, Wei, Xu, Liang, Yuan, Jin Hao, Guan, Di Kai, Wang, Da Wei, You, Yang and Lin, Hua Tay
(2021)
Fabrication of textured (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2 high-entropy ceramics.
Journal of the European Ceramic Society, 41 (1), .
(doi:10.1016/j.jeurceramsoc.2020.08.071).
Abstract
Textured high-entropy boride ceramics, prototypically (Hf0.2Zr0.2Ta0.2Cr0.2Ti0.2)B2, with nearly single phase were fabricated for the first time by spark plasma sintering (SPS) of the corresponding powder, which was derived from boron/carbothermal reduction. Lotgering orientation factor calculation and the pole figures revealed that the c-axis of high-entropy boride grains aligned parallel to the SPS pressing direction after sintering and grains grew along the a,b-axis to form platelet-like morphology. The remarkably high Vickers’ hardness of ∼29 GPa was observed on both of the side surface and the top surface of textured ceramics. The surface perpendicular to the SPS pressing direction demonstrated an improved fracture toughness owing to the oriented elongated grains.
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Published date: January 2021
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Funding Information:
This work was financially supported by State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University (No. 19ZK0113 ), the Pearl River S and T Nova Program of Guangzhou (No. 201710010142 ), Science and Technology Planning Project of Guangdong Province (No. 2017A050501033 ), National Natural Science Foundation of China (No. 51402055 , 51602060 and U1401247 ), Guangdong Innovative and Entrepreneurial Research Team Program (No. 2013G061 and 2014YT02C049 ), and Henry Royce Institute for Advanced Materials, funded through EPSRC grants (No. EP/R00661X/1 , EP/S019367/1 , EP/P02470X/1 and EP/P025285/1 ).
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords:
High-entropy boride ceramic, Mechanical properties, Microstructure, Texture
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Local EPrints ID: 475022
URI: http://eprints.soton.ac.uk/id/eprint/475022
ISSN: 0955-2219
PURE UUID: be8be1bc-8c73-43e2-a537-4a572594c7b1
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Date deposited: 08 Mar 2023 17:55
Last modified: 18 Mar 2024 04:09
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Contributors
Author:
Yan Zhang
Author:
Shi Kuan Sun
Author:
Wei Ming Guo
Author:
Wei Zhang
Author:
Liang Xu
Author:
Jin Hao Yuan
Author:
Di Kai Guan
Author:
Da Wei Wang
Author:
Yang You
Author:
Hua Tay Lin
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