Linked from
The 70 pages that link to Phase diagram, each with the reason it gives.
VaporRelated: It locates the conditions under which a substance can exist as vapor.
Ceramic engineeringRelated: Phase diagrams guide ceramic composition choices and firing schedules.
Heat treatingRelated: Phase boundaries help determine temperatures for heating and transformation.
Binary fluidRelated: It locates the single-phase and two-phase regions of a binary fluid.