Contents of Today S.J.T.U. Phase Transformation and Applications Page 1/34 Review previous Examples Ternary system Review of phase diagrams etc. SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 18 Phase Diagram IV
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 1/34 Contents of Today Review previous Examples Ternary system Review of phase diagrams etc
Summary of Binary Phase Diagrams S.J.T.U. Phase Transformation and Applications Page 2/34 ① ② ③ 4 ⑤ ⑥ ① 图6-25 二元相图的7种基本类型 SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 18 Phase Diagram IV
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 2/34 Summary of Binary Phase Diagrams
Ternary Phases Reaction in Binary Systems S.J.T.U. Phase Transformation and Applications Page 3/34 表6-1二元系的各种三相平衡反应 转变类型 反应式 图型特征 B 共晶转变 l-a+B 共析转变 Y-a+B 共晶型 偏晶转变 h=h+a 熔晶转变 8=l+y 3 包晶转变 I+Ba 包晶型 包析转变 Y+B=a 3 a 合晶转变 h+h=a SJTU Thermodynamics of Materials Spring 2008 ©X.J.Jin Lecture 18 Phase Diagram IV
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 3/34 Ternary Phases Reaction in Binary Systems
相图的用处 S.J.T.U. Phase Transformation and Applications Page 4/34 处理系统是多种物质的复杂系统 -相律 一相图 说明系统在不同条件下以哪几相共存；当温 度、压力、组成改变时会出现什么相变化 各相存在的范围，相变发生的条件等 探索新材料 分析合金组织、化学成分、制定生产和热处理工艺的重 要依据！ SJTU Thermodynamics of Materials Spring2o08©X.J.Jin Lecture 18 Phase Diagram IV
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 4/34 相图的用处 • 处理系统是多种物质的复杂系统 – 相律 – 相图 说明系统在不同条件下以哪几相共存；当温 度、压力、组成改变时会出现什么相变化 各相存在的范围，相变发生的条件等 探索新材料 分析合金组织、化学成分、制定生产和热处理工艺的重 要依据！
相图的用处2 S.J.T.U. Phase Transformation and Applications Page 5/34 M 液相 区域熔炼提纯 析出固溶体杂质的含 固溶体 量比平衡液相的少 WB 熔 熔 图5-15区域熔炼示意图 SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 18 Phase Diagram IV
Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 18 Phase Diagram IV Page 5/34 相图的用处 2 区域熔炼提纯 析出固溶体杂质的含 量比平衡液相的少