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McHugh, J. G., Mouratidis, P., Impellizzeri, A., Jolley, K., Erbahar, D. & Ewels, C. P. (2022) Prismatic edge dislocations in graphite. Carbon, 188 401–419. 
Added by: Richard Baschera (2022-03-18 08:55:12)   Last edited by: Richard Baschera (2022-03-18 08:57:20)
Type de référence: Article
DOI: 10.1016/j.carbon.2021.11.072
Numéro d'identification (ISBN etc.): 0008-6223
Clé BibTeX: McHugh2022
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Mots-clés: Armchair, Bernal, dft, Dislocation, graphite, Klein, Prismatic edge, Zigzag
Créateurs: Erbahar, Ewels, Impellizzeri, Jolley, McHugh, Mouratidis
Collection: Carbon
Consultations : 4/284
Indice de consultation : 10%
Indice de popularité : 2.5%
Liens URLs     https://www.scienc ... /S0008622321011581
Dislocations are a central concept in materials science, which dictate the plastic deformation and damage evolution in materials. Layered materials such as graphite admit two general types of interlayer dislocations: basal and prismatic dislocations, of which prismatic dislocations have been relatively less studied. Using density functional theory (DFT) calculations, we have examined different prismatic core structures in graphite and evaluated their structure, energetics and mobility. We find close energetic interplay between bonded and “free-standing” core structures in both zigzag and armchair directions, with a reconstructed stable zigzag core identified. We explore grain boundaries and prismatic dislocation pile-up, identifying metastable structures which may be important in energy storage. The role of interlayer stacking in core structure, dislocation glide and climb is also considered in-depth. Our calculations suggest that the prismatic dislocation core is stable up to high temperatures of approximately 1500 K in bulk graphite. Above this temperature, the breaking of bonds in the dislocation core can facilitate climb, grain-boundary motion, and the annealing of damage through prismatic dislocation glide.
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