Proceedings of the Discussion Meeting on Thermodynamics of Alloys Held in Barcelona, Spain on 23-26 May 1999. Series B. Volume 86
Abstract
The determination of the thermodynamic functions of formation of alloys is examined in the light of the own experience of the authors. At high temperature, where the entropy term becomes important for the stability of each phase it is very important to obtain the two components of the Gibbs function: the enthalpy and the entropy. Experimental measurements of the chemical potential allow, by derivation versus temperature, to deduce the partial enthalpy and the partial entropy. But for an accurate knowledge of the enthalpy, calorimetry is needed. There exist two types of calorimetric method: direct, by reaction between the components of alloys or indirect mixing calorimetry in a solvent. In any case the most efficient way is to cross the experimental values obtained for the enthalpies with other results involving the Gibbs function. In this direction the Calphad method can be used as a real experimental tool when a good knowledge of the phase diagram is available.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1990
- Accession Number
- ADA241031
Entities
People
- M. D. Baro
Organizations
- University of Barcelona