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Metallurgical Transactions A

, Volume 6, Issue 11, pp 2095–2102 | Cite as

Diffusion in transition metals and alloys

  • V. Srikrishnan
  • P. J. Ficalora
Transport Phenomena

Abstract

The activation energies for diffusion in transition metals is correlated against the localizedd electron population. Thed electron population is determined by the Engel-Brewer theory. A quasichemical model of a binary solid solution is used to determine the distribution of atoms and vacancies. The use of this model enables one to determine the average number of bonds affected by the formation of a vacancy and the jumping of an atom into the vacancy. The activation energy is considered to consist of energies of vacancy formation and atom migration. The correlative curve and an empirical ratio is used to separate the activation energies into the above two parts. Finally the results of the quasichemical model and the correlation are combined. The calculated activation energies of impurity atoms in pure metals and of self diffusion in binary alloys (Co-Ni, Fe-Ti, Fe-Cr and Fe-V) are compared with experimental results.

Keywords

Metallurgical Transaction Vacancy Formation Tracer Diffusion Electron Population Impurity Diffusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 1975

Authors and Affiliations

  • V. Srikrishnan
    • 1
  • P. J. Ficalora
    • 1
  1. 1.Department of Chemical Engineering and Materials ScienceSyracuse UniversitySyracuse

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