(貴州工業(yè)大學(xué)冶金系， 貴陽 550003)
摘 要: 由Al-Si-Fe三元系的三個二元子系用Bonnier法計算和討論了Al-Si-Fe合金在不同溫度下各組元的活度。結(jié)果表明，該三元系中各組元活度均有負(fù)偏差，尤以Fe的偏差為大。當(dāng)Al含量較高時，合金中Al的活性可近似于純金屬Al的活性。三元系中Al含量不變時，增加Fe的含量，即用Fe代替部分Si可使Al的活度有所增加。對于Al-Si-Fe三元系的計算，Bonnier法比其它解析計算方法簡單。
關(guān)鍵字: Al-Si-Fe三元系；活度；計算
（Department of Metallurgy, Guizhou University of Technology, Guiyang 550003, P.R.China）
Abstract:From the three relative binary systems of Al-Si-Fe ternary system, the activity of each component in the Al-Si-Fe ternary system at various temperatures was calculated and discussed. The activities of all components in the ternary system have negative deviations, especially very high for Fe. When the content of Al is higher, the activity of Al in the alloy is nearly equal to the activity of pure Al. In the Al-Si-Fe ternary system,when the content of Al is constant, if the content of Fe increases,the activity of Al will increase. For the calculation of Al-Si-Fe ternary system, the method is simpler than another analysis method.
Key words: Al-Si-Fe ternary system; activity; calculation
