Приказ основних података о документу

dc.creatorRadetić, Tamara
dc.creatorJohnson, E.
dc.creatorOlmsted, D. L.
dc.creatorYang, Yang
dc.creatorLaird, B. B.
dc.creatorAsta, M.
dc.creatorDahmen, U.
dc.date.accessioned2021-03-10T13:26:03Z
dc.date.available2021-03-10T13:26:03Z
dc.date.issued2017
dc.identifier.issn1359-6454
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/3618
dc.description.abstractWe have made direct observations of the Brownian motion of individual nanosized liquid lead inclusions in solid aluminum by in-situ transmission electron microscopy. The process was found to depend strongly on the size of the inclusion and the anisotropy of the interfacial energy. The rate controlling mechanism was the nucleation of steps on facets of the equilibrium shape and the diffusion of Al along the liquid-solid interface. Because the Al-Pb interface undergoes a roughening transition at T-r approximate to 820 K, the step nucleation barrier decreases with increasing temperature and vanishes completely at Tr. By including the temperature dependence explicitly, we demonstrate that the contribution of the step energy to an Arrhenius plot of the data has a slope greater than the actual activation energy at temperature T by a factor T-r/(T-r-T). In addition, we show that the diffusion barrier for interfacial transport makes a substantial contribution. Our analysis reconciles a large discrepancy between activation energies obtained from the temperature and size dependences of the process and solves the apparent paradox posed by the observation that some particles are frozen in non-equilibrium shapes while nearby smaller particles are sufficiently mobile to undergo rapid Brownian motion.en
dc.publisherPergamon-Elsevier Science Ltd, Oxford
dc.relationOffice of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
dc.relationChinese National Science FoundationNational Natural Science Foundation of China (NSFC) [11504110]
dc.relationNational Science FoundationNational Science Foundation (NSF) [CHE-1465226]
dc.relationDivision Of ChemistryNational Science Foundation (NSF)NSF - Directorate for Mathematical & Physical Sciences (MPS) [1465226] Funding Source: National Science Foundation
dc.rightsrestrictedAccess
dc.sourceActa Materialia
dc.subjectEmbedded particle diffusionen
dc.subjectBrownian motionen
dc.subjectStep nucleationen
dc.subjectArrhenius slopeen
dc.subjectRoughening transitionen
dc.titleStep-controlled Brownian motion of nanosized liquid Pb inclusions in a solid Al matrixen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage433
dc.citation.other141: 427-433
dc.citation.rankaM21
dc.citation.spage427
dc.citation.volume141
dc.identifier.doi10.1016/j.actamat.2017.09.040
dc.identifier.scopus2-s2.0-85029675245
dc.identifier.wos000415768100040
dc.type.versionpublishedVersion


Документи

Thumbnail

Овај документ се појављује у следећим колекцијама

Приказ основних података о документу