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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3917

Title: DETERMINATION OF THE ATTEMPT FREQUENCY FOR RELAXATION PHENOMENA IN AMORPHOUS METALS
Authors: DE CEUNINCK, Ward
KNUYT, Gilbert
Stulens, Herwig
DE SCHEPPER, Luc
STALS, Lambert
Issue Date: 1991
Publisher: ELSEVIER SCIENCE SA LAUSANNE
Citation: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 133. p. 337-339
Abstract: It is well known that amorphous alloys show structural relaxation behaviour during annealing and that this can be described by the AES model [1]. One important parameter, used in the AES model, is the attempt frequency. It will be shown that a good knowledge of the latter is of vital importance to describe the relaxation behaviour of an amorphous alloy in a quantitative way. Therefore, the attempt frequency for relaxation phenomena in an amorphous Fe40Ni40B20 alloy was determined. In this paper we present a set of high resolution d.c. electrical resistance measurements performed during annealing of Fe40Ni40B20 amorphous ribbons. We calculated the attempt frequency by using a linear regression technique, and found a value of v0 = 8.0 x 10(13) Hz. There is good agreement with the results found by Gibbs [2], who analysed the experimental data of Mulder et al. [3], who used a pulse echo technique to measure the change of Young's modulus of Fe40Ni40B20 amorphous ribbons during relaxation. Also, it is clear that the attempt frequency is of the order of the Debye frequency. This suggests [1] that the observed relaxation involves rather single atom processes instead of the cooperative motion of large groups of atoms.
Notes: DECEUNINCK, W, LIMBURGS UNIV CENTRUM,MAT PHYS RES GRP,UNIV CAMPUS,B-3610 DIEPENBEEK,BELGIUM.
URI: http://hdl.handle.net/1942/3917
DOI: 10.1016/0921-5093(91)90082-X
ISI #: A1991FG70300081
ISSN: 0921-5093
Type: Journal Contribution
Appears in Collections: Research publications

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