16. Phase Diagrams I Flashcards Preview

APSC 278 > 16. Phase Diagrams I > Flashcards

Flashcards in 16. Phase Diagrams I Deck (5):
1

Define phase

A homogeneous portion of a system that has uniform physical and chemical characteristics

2

Define isomorphous

Liquid and solid regions each contain only one phase

3

Phase diagrams assume ____ ____. This assumption suggests that diffusion happened _____ or enough time has passed to reach _____.

infinite diffusion
instantaneously
equilibrium

4

What two things does non-equilibrium assume?

1. No or very little diffusion in solid, but instantaneous diffusion in liquid
2. No or little compositional changes in solid over time

5

What structure does non-equilibrium cooling give rise to?

cored structures (center of solid particles may have higher concentration than outer regions of the solid)