Premium
Electromigration in Liquid NaK Alloys
Author(s) -
Jousset J. C.,
Huntington H. B.
Publication year - 1969
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.19690310237
Subject(s) - electromigration , ion , cathode , anode , alloy , electron , atmospheric temperature range , thermodynamics , range (aeronautics) , atom (system on chip) , flux (metallurgy) , materials science , condensed matter physics , chemistry , analytical chemistry (journal) , physics , metallurgy , organic chemistry , electrode , quantum mechanics , chromatography , computer science , composite material , embedded system
The relative electromigration of Na and K atoms in liquid NaK alloys has been investigated for two compositions, 0.47 and 0.30 K (atom. conc.). This effect has been found to be in the opposite direction for the two alloys; Na ions go towards the anode for the 0.47 K concentration and towards the cathode for the 0.30 K. The interpolated concentration of this reversal is found to equal 0.39 K, in agreement with the result of Drakin and Maltsev [13]. The variation of the coefficients of “electron drag” for both components has been measured as a function of temperature in the range of 85 to 300 °C, where they behave anomalously. In both the dilute and concentrated alloy regions the directions of the mass flux agree with theoretical predictions but the magnitudes are smaller by nearly a factor of 10. A possible explanation may be that mass transport proceeds through the motion of large coordinated complexes. The breakup of these complexes at higher temperature might explain one aspect of the anomalous temperature dependence.