Ch 10 Phase Diagrams Flashcards
eutectic
def.
easily melted
metastable
def.
basically stable because change is ridiculously slow
isomorphous
complete liquid and solid solubility of the components
IOW: no weird boundaries in the phase diagram
solvus line
the solid solubility line between alpha and alpha + beta
basically the solubility limit where one phase needs to become two
solidus line
where a solid becomes a solid + liquid due to solubility limit
alpha to alpha + liquid
liquidus
where alpha + liquid meets just liquid
invariant point
cannot go anywhere without changing a crucial feature
like standing on the point of four corners
eutectic structure
like several pieces of plywood in a structure
lamillar layers forming of the components
terminal solid solutions
where two solid phases can exist together in composition ranges
intermediat solid solutions
lots of solutions of solids
intermetallic compounds
where one compound can exist peacfully inside the phase diagram
not influenced by temperature
characterized by straight vertical lines
eutectoid reaction
where one solid becomes two different solids or vice versa
peritectic reaction
one solid becoms a liquid and a different solid
hypoeutectoid alloy
less that eutectoid
proeutectic
pre-eutectic, or “before the eutectoid”
