Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3905
Title: CALCULATION OF SOME METALLIC-GLASS PROPERTIES, BASED ON THE USE OF A GAUSSIAN DISTRIBUTION FOR THE NEAREST-NEIGHBOR DISTANCE .2. DIFFUSION AND VISCOSITY PROPERTIES
Authors: KNUYT, Gilbert 
STALS, Lambert 
DE SCHEPPER, Luc 
Issue Date: 1991
Publisher: TAYLOR & FRANCIS LTD
Source: PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 63(6). p. 1289-1297
Abstract: Starting from experimental data in the literature, a strong, nearly linear correlation is demonstrated between the apparent activation energy for diffusion and the logarithm of the pre-exponential factor. This correlation, as well as the extreme values found for the pre-exponential factor, are explained on the basis of an activation energy spectrum. The latter is assumed to be Gaussian, which seems reasonable, bearing in mind that the activation energy depends on the interatomic distances, and that the nearest-neighbour distances nearly follow a Gaussian distribution. Further, the viscosity of amorphous material is studied, using again a distribution of energy barriers. Within this description, an explanation is given for the experimentally observed linear increase in viscosity with time of an as-quenched amorphous alloy during isothermal measurements.
Notes: KNUYT, G, LIMBURGS UNIV CENTRUM,MAT PHYS RES GRP,UNIV CAMPUS,B-3610 DIEPENBEEK,BELGIUM.
Document URI: http://hdl.handle.net/1942/3905
ISI #: A1991FV81200007
Type: Journal Contribution
Appears in Collections:Research publications

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