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phase diagram - Coggle Diagram
phase diagram
reactions
monotectic
liquid to 2nd liquid + solid
eutectoid
solid to 2 solid
peritectic
solid and liquid to 2nd solid
peritectoid
2 solid to 1 solid
eutectic
liquid to 2 solid
purpose
show various phases at different composition and temperature
shows the solid solubility
shows the range of solid and liquid phase
show the composition of each phases (using Lever Rule)
solid solution
interstitial
substitutional
form phase if exceed solubility limit
intermediate
formed between metal & nonmetal
intermetallic
forned between metals
stoichiometric
fixed atom ratio
shown as a vertical line in the PD
non-stoichiometric
wide range of compositons
solubility limit
max concentration of the 2nd composition to form 1 phase.
2 categories
unlimited
Hume Rothery Ruling
similar crystal structure
atomic size difference < 15%
same valence
similar electronegativity
limited
will form other phase when exceed the solubility limit
incongruent
experience >1 phases change
congruent phase transformation
experience no phases change