ααβαββLiquidXαXβXαXLXLXLXBXBXBP = constantP = constantT = 900P = constantT = 800GGGGraphs by MIT OCW.T = TEUXαXLXLXβXΒP = ConstantGβα+Figure by MIT OCW.P = constantT = TEUGXαXΒXβαβFigure by MIT OCW.ZZ'α + Lα + ββ + LβLLααL(C4 wt% sn)α (18.3wt% Sn) fkImL (61.9 wt% Sn)Eutectic structurePrimary α(18.3 wt% Sn)β (97.8 wt% Sn)Eutectic α(18.03 wt% Sn)30020010000 20 60 80600500400300200100100Temperature (0C)Temperature (0F)C4 (40)Composition (wt% Sn)Schematic representations of the equilibrium microstructures for a lead-tinalloy of composition C4 as it is cooled from the liquid-phase region.(Pb) (Sn)Figure by MIT OCW.1300120011001000900800700600Ag 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 CuCuXcmT(0K)LiquidAgEutectic phase diagram for a silver-copper system.2800260024002200200018001600MgO CaO20 40 60 80 100Temperature (0C)LMgO ss + LMgO ssCaO ss + LCaO ssMgO ss + CaO ssWt %Eutetic phase diagram for MgO-CaO system.Figure by MIT OCW.Figure by MIT
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