(東北大學(xué) 材料與冶金學(xué)院，沈陽 110819)
摘 要: 采用熔化自由能法、標準生成自由能法和化學(xué)平衡法推導(dǎo)出利用8種類型的三元相圖計算活度的公式，覆蓋了三元相圖的點、線、面全部范圍。公式本身沒有引進假設(shè)和近似。這8種類型的三元相圖涵蓋了有液相面各種類型的三元相圖。本研究的計算方法和計算公式可以應(yīng)用于各種復(fù)雜的三元相圖，該方法也可以推廣到三元等溫截面相圖和三元以上的多元相圖。
關(guān)鍵字: 三元相圖；活度；計算；熔化自由能法；標準生成自由能法；化學(xué)平衡法
（School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:The activities formulas of all the points, lines and areas were calculated from the eight typical ternary phase diagrams by means of the melting point free energy method, standard free energy of formation method and chemical equilibrium method. No assumptions and approximations were introduced. The eight typical phase diagrams studied almost cover the whole range of ternary phase diagrams. The calculation methods and formulas could be applied to all kinds of complicated ternary phase diagrams. Additionally, this method could also be widely applied to the ternary isothermal section phase diagrams and multi-component phase diagrams.
Key words: ternary phase diagrams; activities; calculation; melting free energy method; standard formation free energy method; chemical equilibrium method
