(北京科技大學(xué)冶金學(xué)院，北京 100083)
摘 要: 含共晶體二元金屬熔體由2個(gè)溶液組成，含共晶體三元熔锍則由3個(gè)溶液組成。仿照這兩個(gè)二、 三相熔體的例子，將含共晶體三、四元金屬熔體看作由3，4個(gè)溶液組成的非均相熔體，并利用含共晶體二元金屬熔體的有關(guān)熱力學(xué)參數(shù)，針對(duì)由同類(lèi)亞穩(wěn)態(tài)化合物組成的對(duì)稱(chēng)型三元系、不同類(lèi)型亞穩(wěn)態(tài)化合物組成的非對(duì)稱(chēng)型三元系及四元系含共晶體金屬熔體，制定了相應(yīng)的作用濃度計(jì)算模型。計(jì)算的作用濃度與實(shí)測(cè)活度符合，既證明所制定的模型符合相應(yīng)金屬熔體的結(jié)構(gòu)特性，又證明從含共晶體二元金屬熔體和三元熔锍所得到的規(guī)律可以應(yīng)用于含共晶體三、四元金屬熔體。
關(guān)鍵字: 共晶體 金屬熔體 作用濃度
（Metallurgical Engineering School,University of Science and Technology Beijing, Beijing 100083, P. R. China）
Abstract:Binary metallic melts involving eutectic consist of two solutions, while ternary metallic melts involving eutectic consist of three solutions. Following these two examples of two and three phases, regarding ternary and quarternary metallic melts involving eutectic as melts consisting of three and four non-homogeneuos solutions correspondingly, and using thermo-dynamic parameters of binary metallic melts involving eutectic, calculating models of mass action concentrations for ternary symmetrical melts formed from similar metastable compounds, ternary unsymmetrical melts formed from unsimilar metastable compounds and quart ernary metallic melts involving eutectic have been formulated. Calculated mass action concentrations agree with measured activities, this both shows that these models can reflect the structural characteristics of corresponding melts, and that the regularities obtained from binary metallic melts and ternary mattes invol ving eutectic are applicable to ternary and quarternary metallic melts involving eutectic.
Key words: eutectic metallic melt mass action concentration
