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Analysis of Self‐Diffusion Data in V and Nb
Author(s) -
Eftaxias K.,
Hadjicontis V.
Publication year - 1989
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.2221560202
Subject(s) - enthalpy , diffusion , thermodynamics , linearity , arrhenius equation , statistical physics , activation energy , materials science , chemistry , physics , quantum mechanics
Abstract Self‐diffusion studies have shown that V and Nb are characterized by a non‐linear Arrhenius behaviour. This behaviour is usually explained within the frame of the existence of two or three diffusion mechanisms and the relevant analysis requires the determination of a number of adjustable parameters. It is shown that the non‐linearity disappears when one plots In D vs. ( B Ω)/( kT ) instead of the usual In D vs. 1/ T . Such an analysis does not need the introduction of any adjustable parameter and allows the determination of the activation entropy, enthalpy, and attempt frequency.