From dislocation nucleation to dislocation multiplication in ceramic nanoparticle

Inas Issa; Lucile Joly-Pottuz; Jonathan Amodeo; David J. Dunstan; Claude Esnouf; Julien Réthoré; Vincent Garnier; Jérôme Chevalier; Karine Masenelli-Varlot

doi:10.1080/21663831.2021.1894253

From dislocation nucleation to dislocation multiplication in ceramic nanoparticle

Inas Issa, Lucile Joly-Pottuz, Jonathan Amodeo, David J. Dunstan, Claude Esnouf, Julien Réthoré, Vincent Garnier, Jérôme Chevalier, Karine Masenelli-Varlot

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Magnesium oxide nanocubes are compressed along the [001] direction in situ in the transmission electron microscope. Incipient plasticity in the smaller samples is characterized by the nucleation of few (Formula presented.) dislocations while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses scattered stochastically above a minimum value varying as the inverse of the sample size. The upper bound is given by the reduced number of dislocation sources. Such size-dependent behaviour is justified by a detailed statistical analysis and is fully explained by the deformation mechanism.

Original language	English
Pages (from-to)	278-283
Number of pages	6
Journal	Materials Research Letters
Volume	9
Issue number	6
DOIs	https://doi.org/10.1080/21663831.2021.1894253
Publication status	Published - 2021
Externally published	Yes

Keywords

In situ
TEM
compression
dislocation
mgo

ASJC Scopus subject areas

Materials Science(all)

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10.1080/21663831.2021.1894253

Cite this

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title = "From dislocation nucleation to dislocation multiplication in ceramic nanoparticle",

abstract = "Magnesium oxide nanocubes are compressed along the [001] direction in situ in the transmission electron microscope. Incipient plasticity in the smaller samples is characterized by the nucleation of few (Formula presented.) dislocations while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses scattered stochastically above a minimum value varying as the inverse of the sample size. The upper bound is given by the reduced number of dislocation sources. Such size-dependent behaviour is justified by a detailed statistical analysis and is fully explained by the deformation mechanism.",

keywords = "In situ, TEM, compression, dislocation, mgo",

author = "Inas Issa and Lucile Joly-Pottuz and Jonathan Amodeo and Dunstan, {David J.} and Claude Esnouf and Julien R{\'e}thor{\'e} and Vincent Garnier and J{\'e}r{\^o}me Chevalier and Karine Masenelli-Varlot",

note = "Funding Information: The authors acknowledge the Consortium Lyon Saint-Etienne de Microscopie (CLYM) for the access to the JEOL 2010F microscope. Publisher Copyright: {\textcopyright} 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.",

year = "2021",

doi = "10.1080/21663831.2021.1894253",

language = "English",

volume = "9",

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T1 - From dislocation nucleation to dislocation multiplication in ceramic nanoparticle

AU - Issa, Inas

AU - Joly-Pottuz, Lucile

AU - Amodeo, Jonathan

AU - Dunstan, David J.

AU - Esnouf, Claude

AU - Réthoré, Julien

AU - Garnier, Vincent

AU - Chevalier, Jérôme

AU - Masenelli-Varlot, Karine

N1 - Funding Information: The authors acknowledge the Consortium Lyon Saint-Etienne de Microscopie (CLYM) for the access to the JEOL 2010F microscope. Publisher Copyright: © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2021

Y1 - 2021

N2 - Magnesium oxide nanocubes are compressed along the [001] direction in situ in the transmission electron microscope. Incipient plasticity in the smaller samples is characterized by the nucleation of few (Formula presented.) dislocations while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses scattered stochastically above a minimum value varying as the inverse of the sample size. The upper bound is given by the reduced number of dislocation sources. Such size-dependent behaviour is justified by a detailed statistical analysis and is fully explained by the deformation mechanism.

AB - Magnesium oxide nanocubes are compressed along the [001] direction in situ in the transmission electron microscope. Incipient plasticity in the smaller samples is characterized by the nucleation of few (Formula presented.) dislocations while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses scattered stochastically above a minimum value varying as the inverse of the sample size. The upper bound is given by the reduced number of dislocation sources. Such size-dependent behaviour is justified by a detailed statistical analysis and is fully explained by the deformation mechanism.

KW - In situ

KW - TEM

KW - compression

KW - dislocation

KW - mgo

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JO - Materials Research Letters

JF - Materials Research Letters

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From dislocation nucleation to dislocation multiplication in ceramic nanoparticle

Abstract

Keywords

ASJC Scopus subject areas

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