Applied Thermodynamics: Grain Boundary Segregation

作者：Lejcek, Pavel^*; Zheng, Lei; Hofmann, Siegfried; Sob, Mojmir

来源：Entropy, 2014, 16(3): 1462-1483.

DOI：10.3390/e16031462

• interfacial segregation
• Gibbs energy of segregation
• enthalpy
• entropy
• volume
• grain boundaries
• iron

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.

• 出版日期2014-3
• 单位北京科技大学