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A kinetic model for the influence of external noises such as fluctuations of the vacancies' generation rate and inhomogeneity of irradiated f.c.c. crystal on the formation of nanoscale modulated dissipative structure in a spatial distribution of vacancies is considered. The generation rate of vacancies all over the sites and a density of their dislocation-type sinks are modelled as independent random uniform stationary fields and with certain defined parameters of fluctuation correlations - spatial and temporal ones. Such stochastic fields can induce a spatial redistribution of vacancies that can lead to their density stationary uniform field or stochastic one. By the average value and correlation functions of these fluctuations, the conditions are determined for interacting fluctuations of the vacancies' density, under which this homogeneous random field becomes unstable in relation to the stochastic field with a spatially periodic mean distribution of vacancies' density. For instance, with f.c.c. nickel as a model of the irradiated functional material, the temperature dependence of spatial period d(T) of the modulated dissipative structure of vacancies' subsystem in f.c.c. crystal is numerically forecasted and analysed, taking into account the total ('electrochemical' + 'strain-induced') interaction between vacancies. Such d(T)-dependence is also determined by the kinetic characteristics of vacancies' redistribution.

Titel:	The evolution of the nanoscale dissipative structures in a distribution of defects within the isothermally irradiated f.c.c. crystal
Autor/in / Beteiligte Person:	TATARENKO, Valentyn A ; SELYSHCHEV, Pavlo O ; OLIINYK, Olena V ; YONG BUM, PARK
Link:	View record from PASCAL Archive
Zeitschrift:	Philosophical magazine (2003. Print), Jg. 94 (2014), Heft 22-24, S. 2724-2749
Veröffentlichung:	Abingdon: Taylor & Francis, 2014
Medientyp:	academicJournal
Umfang:	print, 58 ref
ISSN:	1478-6435 (print)
Schlagwort:	Crystallography Cristallographie cristallogenèse Condensed state physics Physique de l'état condensé Sciences exactes et technologie Exact sciences and technology Physique Physics Domaines interdisciplinaires: science des materiaux; rheologie Cross-disciplinary physics: materials science; rheology Science des matériaux Materials science Nanomatériaux et nanostructures : fabrication et caractèrisation Nanoscale materials and structures: fabrication and characterization Matériaux nanocristallins Nanocrystalline materials Traitements de surface Surface treatments Bruit fond Background noise Champ aléatoire Random field Campo aleatorio Champ uniforme Uniform field Campo uniforme Cinétique Kinetics Corrélation spatiale Spatial correlation Correlación espacial Densité dislocation Dislocation density Densité lacune Vacancy density Densidad vacuidad Défaut Defects Dépendance température Temperature dependence Effet contrainte Stress effects Effet rayonnement Radiation effects Etude théorique Theoretical study Fluctuation Fluctuations Fonction corrélation Correlation functions Formation défaut Defect formation Formación defecto Hétérogénéité Inhomogeneity Lacune Vacancies Modèle cinétique Kinetic model Modelo cinético Modèle stochastique Stochastic model Modelo estocástico Nanostructure Nanostructures Nickel Répartition spatiale Spatial distribution Sous système Subsystem Subsistema Structure dissipative Dissipative structures Structure modulée Modulated structure Estructura modulada 8107B 8165R
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: Department of Solid State Theory, G. V. Kurdyumov Institute for Metal Physics, N.A.S. U., 36 Academician Vernadsky Blvd., 03680 Kyyiv-142, Ukraine ; Department of Physics, University of Pretoria, Private Bag X20, 0028 Hatfield, South Africa ; Department of Materials Science and Metallurgical Engineering, Nano Materials Research Center, Sunchon National University, 315 Maegok, Sunchon, Jeonnam 540-742, Korea, Republic of Rights: Copyright 2015 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Physics and materials science

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The evolution of the nanoscale dissipative structures in a distribution of defects within the isothermally irradiated f.c.c. crystal