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Electrotransport and diffusivity of molybdenum, rhenium, tungsten, and zirconium in beta-thoriumThe electric mobilities, diffusivities, and effective valences were determined for molybdenum, rhenium, tungsten, and zirconium in beta-thorium. All four solutes migrated in the same direction as the electron flow. Rhenium and molybdenum were found to be very mobile, with tungsten somewhat slower. Zirconium was found to move at a rate near that of the self-diffusion of beta-thorium, viz., about 10 to the -11th sq m/s at 1500 C. The electromigration velocities showed a similar trend. A comparison was made between experimental data obtained by scanning laser mass spectrometry and theoretical transport equations for two purification experiments. Good agreement was obtained with both the concentration profile predicted by DeGroot and the purification ratio predicted by Verhoeven.
Document ID
19840063781
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schmidt, F. A.
(Ames Lab. IA, United States)
Beck, M. S.
(Ames Lab. IA, United States)
Rehbein, D. K.
(Ames Lab. IA, United States)
Conzemius, R. J.
(Ames Lab. IA, United States)
Carlson, O. N.
(U.S. Department of Energy, Ames Laboratory, Ames IA, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: Electrochemical Society, Journal
Volume: 131
ISSN: 0013-4651
Subject Category
Inorganic And Physical Chemistry
Accession Number
84A46568
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-82
CONTRACT_GRANT: NASA ORDER H-34328-B
Distribution Limits
Public
Copyright
Other

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