Ternary Diagrams S.J.T.0. Phase Transformation and Applications Page 12/34 Degrees of freedom available in the system(F): F=C-P+1 F:the number of system variables that we may freely vary,or arbitrarily fix C:components P:phase C=3 P=1,F=3 Binary 2D P=2,F=2 ↓ P=3,F=1 Ternary 3D P=4,F=0 Quaternary SJTU Thermodynamics of Materials Fall 2011 @X.J.Jin Lecture 17 Phase Diagram IVPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 17 Phase Diagram IV Page 12/34 Ternary Diagrams Degrees of freedom available in the system (F): F: the number of system variables that we may freely vary, or arbitrarily fix C: components P: phase F = C − P +1 C = 3 4, 0 3, 1 2, 2 1, 3 = = = = = = = = P F P F P F P F Binary Ternary 2D 3D Quaternary