Lever Rule ·
Reading Phase Fractions from a Tie-Line
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.com · Pb-Sn · 40 wt% Sn at 200 °C · fα = (X_L−X₀)/(X_L−Xα)
f solid
—
f liquid
—
State
—
Liquid (X_L ≈ 57 wt% Sn)
Solid α (Xα ≈ 18 wt% Sn)
Overall X₀ = 40 wt% Sn (fulcrum)
Lever arms / phase fractions
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.com · The Lever Rule