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Titel: Interface controlled diffusional creep
Verfasser: Arzt, Eduard
Ashby, Michael F.
Verrall, R. A.
Sprache: Englisch
Erscheinungsjahr: 1983
Quelle: Acta metallurgica. - 31. 1983, 12, S. 1977-1989
SWD-Schlagwörter: Polykristall
Diffusion
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumentart : Journalartikel
Kurzfassung: Diffusional flow of a polycrystal is classically treated as a continuum diffusion problem: its rate is calculated by solving for the diffusional flux of matter through or around each grain in a polycrystal, driven by the stress acting on it. Many, but not all, experimental observations are adequately explained by this model. Progress in understanding the discrepancies can be made by considering the microscopic processes involved in diffusional flow: the detailed nature and number, of sinks and sources in the grain boundaries; and their mobility. This paper treats these problems and derives expressions for the rate of diffusional flow when the density of sinks and sources becomes small and when their mobility is limited by impurities, solutes, or precipitates. The results become identical with those of the classical treatment in the appropriate limits.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-19784
hdl:20.500.11880/24025
http://dx.doi.org/10.22028/D291-23969
SciDok-Publikation: 15-Jan-2009
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
INM
SE - Sonstige Einrichtungen

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