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From dislocation nucleation to dislocation multiplication in ceramic nanoparticle
- Source :
- Materials Research Letters, Vol 9, Iss 6, Pp 278-283 (2021)
- Publication Year :
- 2021
- Publisher :
- Taylor & Francis Group, 2021.
-
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 $ \raise.5ex\hbox{$\scriptstyle 1$}\kern-.1em/\kern-.15em\lower.25ex\hbox{$\scriptstyle 2$} {\lt}110{\gt} \{{110} \} $ 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.
Details
- Language :
- English
- ISSN :
- 21663831
- Volume :
- 9
- Issue :
- 6
- Database :
- Directory of Open Access Journals
- Journal :
- Materials Research Letters
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.f3ff6a06f65d44f583907d6edaf65e3a
- Document Type :
- article
- Full Text :
- https://doi.org/10.1080/21663831.2021.1894253