dc.creator | Johnson, Erik | |
dc.creator | Levinsen, Mogens T. | |
dc.creator | Steenstrup, Stig | |
dc.creator | Prokofjev, Sergei | |
dc.creator | Zhilin, Victor | |
dc.creator | Dahmen, Ulrich | |
dc.creator | Radetić, Tamara | |
dc.date.accessioned | 2024-02-27T12:09:18Z | |
dc.date.available | 2024-02-27T12:09:18Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 1478-6435 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7275 | |
dc.description.abstract | Migration of nanosized liquid Pb inclusions attached to dislocations in Al
has been observed during in-situ transmission electron microscopy heating
experiments and monitored by real-time video recordings. The movements of
the inclusions can be separated into two independent components parallel to
and perpendicular to the dislocations respectively. Movements parallel to the
dislocation lines display properties of partially confined one-dimensional random
walks where smaller inclusions can be seen to move over distances that are
many times their own sizes. In contrast, the trajectories perpendicular to the
dislocation lines are within narrowly confined spaces. Frame-by-frame analysis
of digitized video sequences recorded at different temperatures for the same
inclusion attached to a nearly horizontal dislocation illustrates the two types
of movement. The step lengths parallel to the dislocation increase rapidly
with increasing temperature while the step lengths in the transverse movement
only display a weak temperature dependence. A detailed statistical analysis
of the inclusion trajectories documents that both patterns of movement are
random. The activation enthalpy of the one-dimensional movement parallel
to the dislocation was found to be 2.72 0.10 eV at lower temperatures
and 1.44 0.07 eV at higher temperatures with a transition temperature around
650–660 K | sr |
dc.language.iso | en | sr |
dc.publisher | Taylor & Francis | sr |
dc.relation | Danish Natural Sciences Research Council | sr |
dc.relation | Office of Basic Energy Sciences, Materials Science Division, US Department of Energy, under contract DE-AC3-76SF00098 | sr |
dc.rights | restrictedAccess | sr |
dc.source | Philosophical Magazine | sr |
dc.title | One-dimensional random walk of nanosized liquid Pb inclusions on dislocations in Al | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.epage | 2673 | |
dc.citation.issue | 25-26 | |
dc.citation.spage | 2663 | |
dc.citation.volume | 84 | |
dc.identifier.doi | 10.1080/14786430410001671412 | |
dc.identifier.scopus | 2-s2.0-4444383337 | |
dc.type.version | publishedVersion | sr |