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Entropy 2014, 16(3), 1462-1483; doi:10.3390/e16031462

Applied Thermodynamics: Grain Boundary Segregation

1,* , 2
1 Laboratory of Nanostructures and Nanomaterials, Institute of Physics, Academy of Sciences of the Czech Republic (AS CR), Na Slovance 2, 182 21 Praha 8, Czech Republic 2 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 3 Max-Planck-Institute for Intelligent Systems, Heisenbergstr. 7, 70499 Stuttgart, Germany 4 Central European Institute of Technology, CEITEC MU, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic 5 Institute of Physics of Materials, AS CR, Žižkova 22, 616 62 Brno, Czech Republic 6 Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
* Author to whom correspondence should be addressed.
Received: 5 February 2014 / Revised: 20 February 2014 / Accepted: 28 February 2014 / Published: 12 March 2014
(This article belongs to the Special Issue Advances in Applied Thermodynamics)
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Chemical composition of interfaces—free surfaces and grain boundaries—is generally described by the Langmuir–McLean segregation isotherm controlled by Gibbs energy of segregation. Various components of the Gibbs energy of segregation, the standard and the excess ones as well as other thermodynamic state functions—enthalpy, entropy and volume—of interfacial segregation are derived and their physical meaning is elucidated. The importance of the thermodynamic state functions of grain boundary segregation, their dependence on volume solid solubility, mutual solute–solute interaction and pressure effect in ferrous alloys is demonstrated.
Keywords: interfacial segregation; Gibbs energy of segregation; enthalpy; entropy; volume; grain boundaries; iron interfacial segregation; Gibbs energy of segregation; enthalpy; entropy; volume; grain boundaries; iron
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Lejček, P.; Zheng, L.; Hofmann, S.; Šob, M. Applied Thermodynamics: Grain Boundary Segregation. Entropy 2014, 16, 1462-1483.

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