Optimal preparation of high-entropy boride-silicon carbide ceramics

Abstract

High-entropy boride-silicon carbide (HEB-SiC) ceramics were fabricated using boride-based powders prepared from borothermal and boro/carbothermal reduction methods. The effects of processing routes (borothermal reduction and boro/carbothermal reduction) on the HEB powders were examined. HEB-SiC ceramics with > 98% theoretical density were prepared by spark plasma sintering at 2000 °C. It was demonstrated that the addition of SiC led to slight coarsening of the microstructure. The HEB-SiC ceramics prepared from boro/carbothermal reduction powders showed a fine-grained microstructure and higher Vickers’ hardness but lower fracture toughness value as compared with the same composition prepared from borothermal reduction powders. These results indicated that the selection of the powder processing method and the addition of SiC phase could contribute to the optimal preparation of high-entropy boride-based ceramics.

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Item Type:	Article
Authors/Creators:	Zhang, Y. Sun, S.-K. Guo, W.-M. Xu, L. Zhang, W. Lin, H.-T.
Copyright, Publisher and Additional Information:	© 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Keywords:	high-entropy boride-silicon ceramics; borothermal reduction; boro; carbothermal reduction; microstructure; mechanical properties
Dates:	Published: February 2021 Published (online): 21 October 2020 Accepted: 31 August 2020
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	26 Oct 2021 12:39
Last Modified:	26 Oct 2021 12:39
Status:	Published
Publisher:	Springer Nature
Refereed:	Yes
Identification Number:	10.1007/s40145-020-0418-1
Related URLs:	Author
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:179601

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Optimal preparation of high-entropy boride-silicon carbide ceramics

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