Ternary Diagrams S.J.T.U. Phase Transformation and Applications Page 10/34 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 D P=3,F=1 Ternary 3D P=4,F=0 Quaternary SJTU Thermodynamics of Materials Spring 2008 ©X.J.Jin Lecture 18 Phase Diagram IVPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 10/34 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 −= PCF +1 C = 3 0,4 1,3 2,2 3,1 == == == = = FP FP FP FP Binary Ternary 2D 3D Quaternary