Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond

Tanigaki, Kenichi; Ogi, Hirotsugu; Sumiya, Hitoshi; Kusakabe, Koichi; Nakamura, Nobutomo; Hirao, Masahiko; Ledbetter, Hassel

doi:https://doi.org/10.1038/ncomms3343

Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond

Tanigaki, Kenichi; Ogi, Hirotsugu; Sumiya, Hitoshi et al.

Nature Communications, 2013, 4, 2343

Number of Access:884（2025-11-25 02:18 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84476

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Title	Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond
Creator	NRID 1000040631875 1000040631875 researchmap permalink ktanigaki ktanigaki Scopus Author ID 35853563800 35853563800 CreatorName Tanigaki, Kenichi
	NRID 1000090252626 1000090252626 researchmap permalink read0042771 read0042771 Scopus Author ID 35563683500 35563683500 ORCID 0000-0002-9602-5194 0000-0002-9602-5194 CreatorName Ogi, Hirotsugu
	CreatorName Sumiya, Hitoshi
	NRID 1000010262164 1000010262164 CreatorName Kusakabe, Koichi
	NRID 1000050452404 1000050452404 researchmap permalink nnakamura nnakamura Scopus Author ID 7403356186 7403356186 ORCID 0000-0002-5338-842X 0000-0002-5338-842X CreatorName Nakamura, Nobutomo
	NRID 1000080112027 1000080112027 CreatorName Hirao, Masahiko
	CreatorName Ledbetter, Hassel
Description	Tanigaki K., Ogi H., Sumiya H., et al. "Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond", Nature Communications, 4, 2343 (2013). https://doi.org/10.1038/ncomms3343.
Abstract	Diamond is the stiffest known material. Here we report that nanopolycrystal diamond synthesized by direct-conversion method from graphite is stiffer than natural and synthesized monocrystal diamonds. This observation departs from the usual thinking that nanocrystalline materials are softer than their monocrystals because of a large volume fraction of soft grain-boundary region. The direct conversion causes the nondiffusional phase transformation to cubic diamond, producing many twins inside diamond grains. We give an ab initio-calculation twinned model that confirms the stiffening. We find that shorter interplane bonds along [111] are significantly strengthened near the twinned region, from which the superstiff structure originates. Our discovery provides a novel step forward in the search for superstiff materials. © 2013 Macmillan Publishers Limited. All rights reserved.
Publisher	Springer Nature
Source Title	Nature Communications
Volume (Issue)	4
Page	2343
Date of Issued	2013-08-12
Language	English
Handle URL	https://hdl.handle.net/11094/84476
eISSN	20411723
NCID	AA12645905
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1038/ncomms3343
Access Rights	open access
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Nature Communications. 2013, 4, p. 2343
DC.title	Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond
DC.creator	Tanigaki, Kenichi
	Ogi, Hirotsugu
	Sumiya, Hitoshi
	Kusakabe, Koichi
	Nakamura, Nobutomo
	Hirao, Masahiko
	Ledbetter, Hassel
DC.publisher	Springer Nature
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2013-08-12
DC.identifier	https://doi.org/10.1038/ncomms3343
DC.description	Tanigaki K., Ogi H., Sumiya H., et al. "Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond", Nature Communications, 4, 2343 (2013). https://doi.org/10.1038/ncomms3343.
DCTERMS.abstract	Diamond is the stiffest known material. Here we report that nanopolycrystal diamond synthesized by direct-conversion method from graphite is stiffer than natural and synthesized monocrystal diamonds. This observation departs from the usual thinking that nanocrystalline materials are softer than their monocrystals because of a large volume fraction of soft grain-boundary region. The direct conversion causes the nondiffusional phase transformation to cubic diamond, producing many twins inside diamond grains. We give an ab initio-calculation twinned model that confirms the stiffening. We find that shorter interplane bonds along [111] are significantly strengthened near the twinned region, from which the superstiff structure originates. Our discovery provides a novel step forward in the search for superstiff materials. © 2013 Macmillan Publishers Limited. All rights reserved.
DC.format	84476
citation_title	Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond
citation_author	Tanigaki, Kenichi
	Ogi, Hirotsugu
	Sumiya, Hitoshi
	Kusakabe, Koichi
	Nakamura, Nobutomo
	Hirao, Masahiko
	Ledbetter, Hassel
citation_publisher	Springer Nature
citation_language	English
citation_date	2013-08-12
citation_journal_title	Nature Communications
citation_volume	4
citation_firstpage	2343
citation_doi	https://doi.org/10.1038/ncomms3343
citation_public_url	https://hdl.handle.net/11094/84476

Observation of higher stiffness in nanopolycrystal diamond than monocrystal diamond

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