1. Multi-component Heterogeneous System
Thermodynamics
Multi-component Heterogeneous System
Byeong-Joo Lee
POSTECH - MSE

2. Property of a Regular Solution

3. Property of a Regular Solution

4. Standard States

5. Standard States

6. Standard States
Which standard states
shall we use?

9. Phase Diagrams - Relation with Gibbs Energy of Solution Phases

10. Phase Diagrams - Binary Systems

11. Phase Structure of Multicomponent and Multiphase Systems

12. Morphological Evolution - from Y.S. Yoo, KIMM

13. Morphological Evolution - from Y.S. Yoo, KIMM

14. 1. Conditions for equilibrium
Phase Equilibrium
1. Conditions for equilibrium
2. Gibbs Phase Rule
3. How to interpret Binary and Ternary Phase Diagrams
▷ Lever-Rule

15. CVD Diamond - N.M. Hwang et al., J. Crystal Growth 162, 55 (1996)
Diamond deposited on silicon substrate Soot deposited on the iron substrate

16. Driving force of CVD Deposition - from N.M. Hwang, SNU
※ Example: Deposition of Silicon
SiH4 + 2Cl2 = Si + 4HCl

17. Thermodynamic Paradox - from N.M. Hwang, SNU
Diamond formation with simultaneous graphite etching
in low pressure synthesis of diamond

18. Phase Diagrams - Binary Systems

19. Phase Diagrams - Ternary Systems
1273 K
923 K

20. Assessment of thermodynamic properties in the Na-Al-H ternary system

21. Assessment of thermodynamic properties in the Li-Al-H ternary system

22. Interfacial Reactions ? - between Ti and Al2O3