From dislocation nucleation to dislocation multiplication in ceramic nanoparticle. Issue 6 (3rd June 2021)

• Record Type: Journal Article
• Authors: Issa, Inas; Joly-Pottuz, Lucile; Amodeo, Jonathan; Dunstan, David J.; Esnouf, Claude; Réthoré, Julien; Garnier, Vincent; Chevalier, Jérôme; Masenelli-Varlot, Karine
• Is Part Of: Materials research letters. Volume 9:Issue 6(2021)
• Page Start: 278
• Page End: 283
• Publication Date: 2021-06-03
• Subjects: In situ -- TEM -- compression -- dislocation -- mgo; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2021.1894253
• Languages: English
• ISSNs: 2166-3831

Abstract

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 1 / 2 < 110 > { 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. GRAPHICAL ABSTRACT: UF0001