Characterization of ripplocation mobility in graphite

Autor:	J. Gruber, M. W. Barsoum, G. J. Tucker
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	layered solids deformation mechanisms buckling ripplocations Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 8, Iss 2, Pp 82-87 (2020)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2019.1702115
Popis:	Recent work suggests that layered solids deform through buckling of basal planes. When isolated locally, as in graphite, these buckles, termed ripplocations, behave superficially similar to dislocations, but have no Burgers vectors. Through atomistic simulations, we demonstrate the easy transitions of ripplocations in graphite between many closely-spaced energy states, even at low temperatures. Between 60 and 350 K, their migration barrier is estimated at 32 meV, independent of segment length. Ripplocations spontaneously migrate towards vacancies and away from compressive stresses. These results shed more light on this new micromechanism and potentially explain experimental observations that evade sufficient description through dislocation-based models.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/901f1f734ea94c1cb5a7fde5fcecc866 Zobrazit plný text záznamu View record in DOAJ