Phase Equilibria and Phase Diagrams

(Phase Equilibria of Materials)

재료 상평형

(Fall Semester, 2013)

Intro

• phase equilibria thermodynamics– equil thermo: materials take on and the

in which states would ideally be assumed– thermo: kinetics, rate of evolution toward

equil– one of the important subfields of thermo theory

of

• since this course is theoretical, best to begin with a brief outline of what a physical theory is

• physical theory: attempting to understand and predict by modeling

• it replaces the 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 ‘ ’

• thermo → science of heat, a quantity defined by laws of thermo, not a

thing

• (classical) thermo

• thermo laws 0th: defining empirical temp, eq. of state 1st: internal energy, eq. of state 2nd: entropy, absolute temp, eq. of

state 3rd: entropy

chemistry

netismelectromag

mechanics

complement