| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium: Thermodynamics, Phase Equilibria and Kinetics for Materials Design and Engineering
|
| Presentation Title |
The Third Generation of CALPHAD Descriptions: Case Studies on Al-C and W-C |
| Author(s) |
Zhangting He, Malin Selleby |
| On-Site Speaker (Planned) |
Zhangting He |
| Abstract Scope |
When developing the third generation of Calphad databases, it is critical to test the new unary descriptions in higher-order systems. In addition to testing different methods of extrapolating the solid above its melting temperature and the liquid to low temperatures, modeling compounds, stable and metastable end-members of solution phases within the framework of the compound energy formalism is then of great importance. Since the third generation of Calphad databases are valid down to 0 K, the conventional Neumann-Kopp rule should not be directly applied to describe phases or end-members as it would violate the third law of thermodynamics. Thus, new solutions are needed when developing the third generation data. The “hybrid” Neumann-Kopp/Einstein model has been used to describe the metastable end-members in the Al-C and the W-C systems. The systems were chosen since they are non-magnetic and due to the difference in melting temperatures of Al and W. |
| Proceedings Inclusion? |
Undecided |