Reading Ternary Phase Diagrams in Materials Science (Part 4: Intermediate Compounds)

Most engineering materials are made of at least three different components. Their stability and response to changes in temperature can be mapped and understood using a Ternary Phase Diagram. These tutorials explain how to read and interpret ternary phase diagrams of interest to a Materials Scientist.
The tutorials assume some prior undergraduate-level exposure to binary phase diagrams. They explain the different methods for representing solid-state equilibria, the changes occurring upon melting and how to quantify crystallization/solidification paths for a ternary liquid.
The fourth video introduces intermediate compounds and shows how the correct labeling of the various primary phase fields in the ternary system allows identification of the invariant reactions in the liquidus projection. Examples of crystallization paths are explained and quantified.
Notes on the video content can be found here: drive.google.c...

[@genevettel2942]

Finally find this video series, that's exactly what I need!

[@peterdavies6179]

I hope they are helpful for you.

[@swampertownz123]

Thank you for explaining this very well! It was confusing at first, but helped at lot. Thank you sir.

[@peterdavies6179]

Glad it helped!

[@ezio177]

Thank you for explaining this, very good video!

[@peterdavies6179]

You're very welcome!

[@flieu9342]

Dear Professor Davies,
I cannot agree more with the method of going back to binary before looking at ternary when identifying the primary phase regions and univariant reactions.

[@mangeram2731]

Great thanks Sir

[@peterdavies6179]

You're welcome, glad you enjoyed it

[@samonelly4813]

Thank u!!! We have a test on this and was only giving one example in class. So confused

[@peterdavies6179]

I hope the videos help, good luck on your test.

[@samonelly4813]

@@peterdavies6179 thank you! I already understand so much more, thanks to your video

[@avinashbharti4946]

14:37 , sir can you tell me which compounds are incongruent mealting compound

[@peterdavies6179]

Sure, A2B and AB2 melt incongruently as they yield a solid and liquid with different compositions when they melt. AB melts congruently and forms eutectics with A2B and AB2 (pure A and our B also melt congruently). Hope this makes sense.

[@catarinaguerra9407]

How can you tell when a binary reaction is either eutectic or peritectic?

[@peterdavies6179]

Identify the solid phases and liquid involved; if the liquid composition is in between the solids it is a eutectic; if the liquid is outside both of the solid phases, it is a peritectic. Hope this makes sense.

[@sanguine627]

teacher which app did you use to draw these 🫶🫶 ty for your explaination

[@peterdavies6179]

These are all powerpoints

[@kandesbunzler6041]

Thank you for your videos, they really help a lot and are of very high educative quality.

[@peterdavies6179]

Thank you! Glad they were useful; I hope to post more in the near future.