Volume 59, Number 4, August 2002
|Page(s)||533 - 539|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 August 2002|
Morphological instabilities of moving extended defects
Institute for Problems of Mechanical Engineering, RAS
Bol'shoi prosp. V. O., 61 St Petersburg, 199178, Russia
2 Institut für Theoretische Physik IV, Heinrich-Heine-Universität Düsseldorf Universitätsstrasse 1, D-40225 Düsseldorf, Germany
3 Institut für Theoretische Physik A, RWTH Aachen Templergraben 55, D-52056 Aachen, Germany
Accepted: 16 May 2002
Moving extended defects experience, via continuous energy exchange with the host material, a viscous-friction force which, depending on the nature of the exchange, can lead to unexpected acceleration effects. These occur at well-defined velocity thresholds where they imply phase-transition–like dynamic instabilities of the defect morphology. The apparent universal character of these phenomena is used to exemplify them by the simple scenario of a moving domain boundary which is coupled to a Ginzburg-Landau field of the bulk material.
PACS: 61.72.-y – Defects and impurities in crystals; microstructure / 05.70.Fh – Phase transitions: general studies
© EDP Sciences, 2002
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