Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering

Nature creates composite materials with complex hierarchical structure that possesses impressive mechanical properties enhancement capabilities. An approach to improve mechanical properties of conventional composites is to mimic biological material structured ‘hard’ core and ‘soft’ matrix system. Th...

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Main Authors: Silberschmidt, V., Xie, Sky Shumao, Vasylkiv, Oleg, Tok, Alfred Iing Yoong
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/104529
http://hdl.handle.net/10220/20227
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1045292023-07-14T15:56:05Z Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering Silberschmidt, V. Xie, Sky Shumao Vasylkiv, Oleg Tok, Alfred Iing Yoong School of Materials Science & Engineering Temasek Laboratories DRNTU::Engineering::Materials::Composite materials Nature creates composite materials with complex hierarchical structure that possesses impressive mechanical properties enhancement capabilities. An approach to improve mechanical properties of conventional composites is to mimic biological material structured ‘hard’ core and ‘soft’ matrix system. This would allow the efficient transfer of load stress, dissipate energy and resist cracking in the composite. In the current study, reactive spark plasma sintering (SPS) of boron carbide B4C was carried out in a nitrogen N2 gas environment. The process created a unique core-shell structured material with the potential to form a high impact-resistant composite. Transmission electron microscopy observation of nitrided-B4C revealed the encapsulation of B4C grains by nano-layers of hexagonal-boron nitride (h-BN). Effect of the h-BN contents on hardness were measured using micro- and nano-indentation. Commercially available h-BN was also mechanically mixed and sintered with B4C to compare the effectiveness of nitrided B4C. Results have shown that nitrided B4C have higher hardness value and the optimum content of h-BN from nitridation was 0.4%wt with the highest nano-indentation hardness of 56.7GPa. The high hardness was attributed to the h-BN matrix situated between the B4C grain boundaries which provided a transitional region for effective redistribution of the stress in the material. Accepted version 2014-07-21T05:53:59Z 2019-12-06T21:34:36Z 2014-07-21T05:53:59Z 2019-12-06T21:34:36Z 2013 2013 Journal Article Xie, S. S., Vasylkiv, O., Silberschmidt, V., & Tok, A. I. (2013). Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering. Virtual and Physical Prototyping, 8(4), 253-258. 1745-2759 https://hdl.handle.net/10356/104529 http://hdl.handle.net/10220/20227 10.1080/17452759.2013.862959 en Virtual and physical prototyping © 2013 Taylor & Francis. This is the author created version of a work that has been peer reviewed and accepted for publication by Virtual and Physical Prototyping, Taylor & Francis. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [doi:http://dx.doi.org/10.1080/17452759.2013.862959]. 6 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Composite materials
spellingShingle DRNTU::Engineering::Materials::Composite materials
Silberschmidt, V.
Xie, Sky Shumao
Vasylkiv, Oleg
Tok, Alfred Iing Yoong
Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
description Nature creates composite materials with complex hierarchical structure that possesses impressive mechanical properties enhancement capabilities. An approach to improve mechanical properties of conventional composites is to mimic biological material structured ‘hard’ core and ‘soft’ matrix system. This would allow the efficient transfer of load stress, dissipate energy and resist cracking in the composite. In the current study, reactive spark plasma sintering (SPS) of boron carbide B4C was carried out in a nitrogen N2 gas environment. The process created a unique core-shell structured material with the potential to form a high impact-resistant composite. Transmission electron microscopy observation of nitrided-B4C revealed the encapsulation of B4C grains by nano-layers of hexagonal-boron nitride (h-BN). Effect of the h-BN contents on hardness were measured using micro- and nano-indentation. Commercially available h-BN was also mechanically mixed and sintered with B4C to compare the effectiveness of nitrided B4C. Results have shown that nitrided B4C have higher hardness value and the optimum content of h-BN from nitridation was 0.4%wt with the highest nano-indentation hardness of 56.7GPa. The high hardness was attributed to the h-BN matrix situated between the B4C grain boundaries which provided a transitional region for effective redistribution of the stress in the material.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Silberschmidt, V.
Xie, Sky Shumao
Vasylkiv, Oleg
Tok, Alfred Iing Yoong
format Article
author Silberschmidt, V.
Xie, Sky Shumao
Vasylkiv, Oleg
Tok, Alfred Iing Yoong
author_sort Silberschmidt, V.
title Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
title_short Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
title_full Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
title_fullStr Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
title_full_unstemmed Bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
title_sort bio-inspired structured boron carbide-boron nitride composite by reactive spark plasma sintering
publishDate 2014
url https://hdl.handle.net/10356/104529
http://hdl.handle.net/10220/20227
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