Applied Thermodynamics: Grain Boundary Segregation

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Authors	LEJČEK Pavel ZHENG Lei HOFMANN Siegfried ŠOB Mojmír
Year of publication	2014
Type	Article in Periodical
Magazine / Source	Entropy
MU Faculty or unit	Central European Institute of Technology
Citation
web	http://www.mdpi.com/1099-4300/16/3/1462
Doi	http://dx.doi.org/10.3390/e16031462
Field	Solid matter physics and magnetism
Keywords	APPLIED TENSILE-STRESS; LOW-ALLOY STEEL; INTERFACIAL SEGREGATION; SOLUTE INTERACTION; ALPHA-IRON; PHOSPHORUS; ANISOTROPY; EMBRITTLEMENT; ENTHALPY
Description	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
Related projects:	CEITEC - Central European Institute of Technology