nww Contents of Today S.J.T.0. Phase Transformation and Applications Page 1/40 Review previous Spinodal Points Compounds etc. Applications of phase diagrams Conclusion Remarks Examples SJTU Thermodynamics of Materials Fall 2011 @X.J.Jin Lecture 16 Phase Diagram Ill
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 16 Phase Diagram III Page 1/40 Contents of Today Review previous Spinodal Points Compounds etc. Applications of phase diagrams Conclusion Remarks Examples
Review of Today S.J.T.0. Phase Transformation and Applications Page 2/40 。Immiscibility ·Spinodal Points ·Compounds Summary of Binary Phase Ternary Phases Reaction in Binary Systems ·二元相图构成的规则 SJTU Thermodynamics of Materials Fall 2011 @X.J.Jin Lecture 16 Phase Diagram Ill
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 16 Phase Diagram III Page 2/40 Review of Today • Immiscibility • Spinodal Points • Compounds • Summary of Binary Phase • Ternary Phases Reaction in Binary Systems • 二元相图构成的规则
Binary System S.J.T.0. Phase Transformation and Applications Page 3/40 Degrees of freedom available in the system(F): F=C-P+1 F=C-P+2 F:the number of system variables that we may freely vary,or arbitrarily fix C:components P:phase C=2 P=1,F=2 单相区 P=2,F=1 平衡线包围的两相区 P=3,F=0 三相平衡线 SJTU Thermodynamics of Materials Fall 2011 @X.J.Jin Lecture 16 Phase Diagram Ill
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 16 Phase Diagram III Page 3/40 Binary System 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 + 2 C = 2 3, 0 2, 1 1, 2 = = = = = = P F P F P F F = C − P +1 单相区 平衡线包围的两相区 三相平衡线
S.J.T.0. Phase Transformation and Applications Page 4/40 单元系 二元系 ·F=C-P+2=3-P ·F=C-P+1=3-P ·两相共存F=1 ·两相共存F=1 一给定温度或压力，体 一给定温度或压力，体 系就已确定，因为两 系如果要确定，必须 相均为纯物质 给定两相中的组成， 即浓度 一多相平衡条件给出， SJTU Thermodynamics of Materials Fall 2011 X.J.Jin Lecture 16 Phase Diagram Ill
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 16 Phase Diagram III Page 4/40 单元系 • F=C-P+2=3-P • 两相共存F=1 – 给定温度或压力，体 系就已确定，因为两 相均为纯物质 二元系 • F=C-P+1=3-P • 两相共存F=1 – 给定温度或压力，体 系如果要确定，必须 给定两相中的组成， 即浓度 – 多相平衡条件给出
-46 B m a B T GA-GA m哈 m唱 a+B 哈=咽 (T=T) 相变点 哈=g 9 G Q ② G 公切线 温度 A 磴 B (a)单元系(A) b)二元系(A-B) 图4.1单元系和二元系的两相平衡条件 (a)单元系中自由能的交叉点是平衡温度；(b) 二元系中公切线的切点 ①和②是平衡成分 T.Nishizawa SJTU Thermodynamics of Materials Fall 2011 @X.J.Jin Lecture 16 Phase Diagram Ill
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2011 © X. J. Jin Lecture 16 Phase Diagram III Page 5/40 T. Nishizawa