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Diffusion of 113 Sn in the Intermetallic B8 2 Compounds of the System Ni/Sn
Author(s) -
Schmidt H.,
Frohberg G.,
Miekeley W.,
Wever H.
Publication year - 1992
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.2221710104
Subject(s) - intermetallic , diffusion , vacancy defect , materials science , hexagonal crystal system , tin , effective diffusion coefficient , perpendicular , crystallography , analytical chemistry (journal) , condensed matter physics , thermodynamics , chemistry , metallurgy , physics , geometry , alloy , medicine , mathematics , radiology , magnetic resonance imaging , chromatography
The direction dependence of the diffusion coefficient of 113 Sn has been measured in single crystals of Ni 61 Sn 39 by the layer grinding technique. The activation energies for diffusion parallel and perpendicular to the hexagonal c ‐axis are 2.93 and 3.07 eV, respectively, the D 0 ‐values 4.6 and 9.9 cm 2 /s. The experimental values of ϕ = D ⊥ / D | are between 0.56 and 0.75 depending on the temperature. The experimental values are compared with theoretical values calculated for the different possible diffusion mechanisms. The main mechanism should be a normal vacancy mechanism superimposed by minority mechanisms the increase of which with rising temperature explains the temperature dependence of ϕ.