Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films

Ogi, Hirotsugu; Nakamura, Nobutomo; Tanei, Hiroshi; Hirao, Masahiko; Ikeda, Ryuji; Takemoto, Mikio

doi:https://doi.org/10.1063/1.1946920

Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films

Ogi, Hirotsugu; Nakamura, Nobutomo; Tanei, Hiroshi et al.

Applied Physics Letters, 2005, 86(23), 231904-1-231904-3

Number of Access:191（2025-05-19 12:02 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84205

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Title	Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films
Creator	NRID 1000090252626 1000090252626 researchmap permalink read0042771 read0042771 Scopus Author ID 35563683500 35563683500 CreatorName Ogi, Hirotsugu
	NRID 1000050452404 1000050452404 researchmap permalink nnakamura nnakamura Scopus Author ID 7403356186 7403356186 ORCID 0000-0002-5338-842X 0000-0002-5338-842X CreatorName Nakamura, Nobutomo
	CreatorName Tanei, Hiroshi
	NRID 1000080112027 1000080112027 CreatorName Hirao, Masahiko
	CreatorName Ikeda, Ryuji
	NRID 1000040082838 1000040082838 CreatorName Takemoto, Mikio
Description	Ogi H., Nakamura N., Tanei H., et al. "Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films", Applied Physics Letters, 86(23), 231904 (2005) https://doi.org/10.1063/1.1946920.
Abstract	This letter studies the relationship between the off-diagonal elastic constant C12 and bond configuration in nanocrystalline-diamond (NCD) thin films deposited by the nitrogen-doped chemical vapor deposition method. The film thickness was varied between 2.4 and 11.3 μm. The elastic constants were measured by resonant-ultrasound spectroscopy coupled with laser-Doppler interferometry. The diagonal elastic constants C11 and C44, and Young's modulus in NCD films are smaller than those of the bulk polycrystalline diamond and microcrystalline-diamond (MCD) thin films, and they decrease as the film thickness decreases. However, the off-diagonal elastic constant of the NCD films is significantly larger than that of the bulk diamond, while that of the MCD films is smaller. Micromechanics calculations revealed that this exceptional enhancement of C12 occurs when the material includes randomly distributed thin graphitic plates in the isotropic diamond matrix. Thus, this result indicates that the NCD films consist of s p3 -bonded diamond grains and s p2 -bonded grain boundaries. © 2005 American Institute of Physics.
Publisher	American Institute of Physics
Source Title	Applied Physics Letters
Volume (Issue)	86(23)
Page	231904-1-231904-3
Date of Issued	2005-05-31
Language	English
Handle URL	https://hdl.handle.net/11094/84205
PISSN	00036951
eISSN	10773118
NCID	AA00543431
NCID	AA11868096
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1063/1.1946920
Access Rights	open access
CopyRight	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 86(23), 231904 (2005) and may be found at https://doi.org/10.1063/1.1946920.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Applied Physics Letters. 2005, 86(23), p. 231904-1-231904-3
DC.title	Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films
DC.creator	Ogi, Hirotsugu
	Nakamura, Nobutomo
	Tanei, Hiroshi
	Hirao, Masahiko
	Ikeda, Ryuji
	Takemoto, Mikio
DC.publisher	American Institute of Physics
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2005-05-31
DC.identifier	https://doi.org/10.1063/1.1946920
DC.description	Ogi H., Nakamura N., Tanei H., et al. "Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films", Applied Physics Letters, 86(23), 231904 (2005) https://doi.org/10.1063/1.1946920.
DCTERMS.abstract	This letter studies the relationship between the off-diagonal elastic constant C12 and bond configuration in nanocrystalline-diamond (NCD) thin films deposited by the nitrogen-doped chemical vapor deposition method. The film thickness was varied between 2.4 and 11.3 μm. The elastic constants were measured by resonant-ultrasound spectroscopy coupled with laser-Doppler interferometry. The diagonal elastic constants C11 and C44, and Young's modulus in NCD films are smaller than those of the bulk polycrystalline diamond and microcrystalline-diamond (MCD) thin films, and they decrease as the film thickness decreases. However, the off-diagonal elastic constant of the NCD films is significantly larger than that of the bulk diamond, while that of the MCD films is smaller. Micromechanics calculations revealed that this exceptional enhancement of C12 occurs when the material includes randomly distributed thin graphitic plates in the isotropic diamond matrix. Thus, this result indicates that the NCD films consist of s p3 -bonded diamond grains and s p2 -bonded grain boundaries. © 2005 American Institute of Physics.
DC.rights	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 86(23), 231904 (2005) and may be found at https://doi.org/10.1063/1.1946920.
DC.format	84205
citation_title	Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films
citation_author	Ogi, Hirotsugu
	Nakamura, Nobutomo
	Tanei, Hiroshi
	Hirao, Masahiko
	Ikeda, Ryuji
	Takemoto, Mikio
citation_publisher	American Institute of Physics
citation_language	English
citation_date	2005-05-31
citation_journal_title	Applied Physics Letters
citation_volume	86
citation_issue	23
citation_firstpage	231904-1
citation_lastpage	231904-3
citation_doi	https://doi.org/10.1063/1.1946920
citation_public_url	https://hdl.handle.net/11094/84205

Off-diagonal elastic constant and s p2 -bonded graphitic grain boundary in nanocrystalline-diamond thin films

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