Phase Equilibria and Phase Diagrams Phase Equilibria of
Phase Equilibria and Phase Diagrams (Phase Equilibria of Materials) 재료 상평형 (Fall Semester, 2020)
Intro
• phase equilibria thermodynamics – equil thermo: states materials take on and the hierarchy in which states would ideally be assumed – non-equi thermo: kinetics, rate of evolution toward equil – one of the important subfields of thermo theory of phase transformation • since this course is theoretical, best to begin with a brief outline of what a physical theory is • physical theory: attempting to understand predict physical phenomena by modeling • it replaces the real world: – useful ↔ useless (O) – right ↔ wrong (X)
• theory → common underlying structure ① 정의 (definitions or vocabulary) ② 가정 (assumptions or postulates): laws, axioms, assumptions ③ 수학 (math): mathematical consequences of postulates, used to explain and predict the detailed behavior of the model ④ intuitive extrapolations: the final step of a theory, interpreting and explaining the behavior of systems outside the strict range of the model → a familiar example is classical ‘ Newtonian mechanics ’
• thermo → science of heat, a quantity defined by laws of thermo, not a thing • (classical) thermo complement • thermo laws 0 th: defining empirical temp, thermal eq. of state 1 st: internal energy, caloric eq. of state 2 nd: entropy, absolute temp, fundamental eq. of state 3 rd: absolute entropy
- Slides: 5
