Počet záznamů: 1  

Improved thermodynamic treatment of vacancy-mediated diffusion and creep

  1. 1.
    0464081 - ÚFM 2017 RIV GB eng J - Článek v odborném periodiku
    Fischer, F. D. - Hackl, K. - Svoboda, Jiří
    Improved thermodynamic treatment of vacancy-mediated diffusion and creep.
    Acta Materialia. Roč. 108, APR (2016), s. 347-354. ISSN 1359-6454. E-ISSN 1873-2453
    Grant CEP: GA ČR(CZ) GA15-06390S
    Institucionální podpora: RVO:68081723
    Klíčová slova: Thermodynamics * Non-equilibrium * Diffusion * Vacancies * Thermodynamic extremal principle
    Kód oboru RIV: BJ - Termodynamika
    Impakt faktor: 5.301, rok: 2016

    Approximately a decade ago a new concept to describe the kinetics of one-phase solid state systems evolving by diffusion and activity of vacancies has been published by the authors. The concept is based on the Onsager-Ziegler Thermodynamic Extremal Principle (TEP). In course of the last decade several improvements and corrections have been performed, which justify an overworking of the concept. A short introduction of the TEP is followed by a detail investigation of the Gibbs energy and its rate as well as of dissipation and dissipation function due to multicomponent diffusion process coupled with vacancy activity provoking swelling/shrinkage and creep and thus internal stress state development. The application of TEP allows an exact derivation of driving forces for the coupled processes. The Manning theory of diffusion is applied and the derivation of evolution equations for all system parameters (site fractions, swelling/shrinkage and creep strain tensor) is provided.
    Trvalý link: http://hdl.handle.net/11104/0263138

     
     
Počet záznamů: 1  

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