Kinetics of interstitial segregation in Cottrell atmospheres and grain boundaries

0449671 - ÚFM 2016 RIV GB eng J - Článek v odborném periodiku
Svoboda, Jiří - Zickler, G. A. - Kozeschnik, E. - Fischer, F. D.
Kinetics of interstitial segregation in Cottrell atmospheres and grain boundaries.
Philosophical Magazine Letters. Roč. 95, č. 9 (2015), s. 458-465. ISSN 0950-0839. E-ISSN 1362-3036
Grant CEP: GA ČR(CZ) GA15-06390S
Institucionální podpora: RVO:68081723
Klíčová slova: segregation * grain boundaries * dislocations * simulation * thermodynamic extremal principle
Kód oboru RIV: BJ - Termodynamika
Impakt faktor: 0.918, rok: 2015

Trapping of interstitial (e.g. carbon) atoms is driven by the reduction in energy in the system. Diffusion of interstitials, together with their trapping in dislocation cores and/or grain boundaries, is studied by the thermodynamic extremal principle. In addition to the total Gibbs energy, a well-established formulation of the total dissipation is applied. Dimension-free evolution equations are derived, whose solution is well approximated by an easy to handle kinetic equation. Cottrell's power law can be verified in the initial stage.
Trvalý link: http://hdl.handle.net/11104/0251183