Individual skill

phase-diagram-analysis

Reading and constructing phase diagrams — Gibbs phase rule, lever rule, invariant reactions, and CALPHAD basics.

skills/phase-diagram-analysis/SKILL.md

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## Overview

Phase diagrams are maps of material stability: which phases exist at a given
composition and temperature, and in what proportions. This skill covers
reading binary and ternary diagrams fluently (phase fields, solubility
limits, invariant reactions), quantitative use of the lever rule, and the
basics of CALPHAD-type computational thermodynamics.

## When to use

- Choosing alloy compositions and heat treatments (solutionizing, aging, annealing temperatures)
- Predicting solidification paths and the microstructures they produce
- Interpreting DSC/DTA thermal arrests and linking them to diagram features
- Assessing whether a reported phase is equilibrium or metastable