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How the toughest inorganic fullerene cages absorb shockwave pressures in a protective nanocomposite: experimental evidence from two in situ investigations

Xu, Fang; Kobayashi, Takamichi; Yang, Zhuxian; Sekine, Toshimori; Chang, Hong; Wang, Nannan; Xia, Yongde; Zhu, Yanqiu

Authors

Fang Xu

Takamichi Kobayashi

Zhuxian Yang

Toshimori Sekine

Hong Chang

Nannan Wang

Yongde Xia

Yanqiu Zhu



Abstract

Nanocomposites fabricated using the toughest caged inorganic fullerene WS2 (IF-WS2) nanoparticles could offer ultimate protection via absorbing shockwaves; however, if the IF-WS2 nanomaterials really work, how they behave and what they experience within the nanocomposites at the right moment of impact have never been investigated effectively, due to the limitations of existing investigation techniques that are unable to elucidate the true characteristics of high-speed impacts in composites. We first fabricated Al matrix model nanocomposites and then unlocked the exact roles of IF-WS2 in it at the exact moment of impact, at a time resolution that has never been attempted before, using two in situ techniques. We find that the presence of IF-WS2 reduced the impact velocity by over 100 m/s and in pressure by at least 2 GPa against those Al and hexagonal WS2 platelet composites at an impact speed of 1000 m/s. The IF-WS2 composites achieved an intriguing inelastic impact and outperformed other reference composites, all originating from the “balloon effect” by absorbing the shockwave pressures. This study not only provides fundamental understanding for the dynamic performance of composites but also benefits the development of protective nanocomposite engineering.

Journal Article Type Article
Publication Date Aug 4, 2017
Journal ACS Nano
Print ISSN 1936-0851
Electronic ISSN 1936-086X
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 11
Issue 8
APA6 Citation Xu, F., Kobayashi, T., Yang, Z., Sekine, T., Chang, H., Wang, N., …Zhu, Y. (2017). How the toughest inorganic fullerene cages absorb shockwave pressures in a protective nanocomposite: experimental evidence from two in situ investigations. ACS Nano, 11(8), https://doi.org/10.1021/acsnano.7b02943
DOI https://doi.org/10.1021/acsnano.7b02943
Keywords impact velocity; inorganic fullerene; nanocomposite; shock absorbing; shockwave
Publisher URL https://pubs.acs.org/doi/10.1021/acsnano.7b02943
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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