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Self‐diffusion in silver at low temperatures
Author(s) -
Lam Nghi Q.,
Rothman S. J.,
Mehrer H.,
Nowicki L. J.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220570122
Subject(s) - activation energy , arrhenius plot , arrhenius equation , diffusion , dissociation (chemistry) , self diffusion , atmospheric temperature range , materials science , thermodynamics , chemistry , analytical chemistry (journal) , physics , self service , chromatography , marketing , business
Abstract Self‐diffusion in silver single crystals was measured at temperatures between 270 and 500 °C. The diffusion coefficients were in the range of 3×10 −18 to 2×10 −13 cm 2 /s. The results indicate that the Arrhenius plot is curved owing to a large divacancy contribution and that the activation energy for diffusion by divacancies is temperature dependent due to a partial dissociation of the divacancies. The best values of the parameters for diffusion by monovacancies are D o = 0.041 cm 2 /s, Q = 1.76 eV.