溶融鉄合金中のMnの活量係数におよぼすB, Cr, Mo, Nb, Ta, Wの影響
1975 年 61 巻 10 号 p. 2328-2336
詳細
1975 年 61 巻 10 号 p. 2328-2336
The effect of alloying elements on the activity coefficient of manganese in liquid iron alloys has been measured using a closed chamber method with an alumina capsule. The results obtained are summarized as follows:
(1) The results of interaction parameter eMn(X) in liquid iron alloys at 1570°C are given by
(2) Enthalpy coefficient hMn(X) and entropy coefficient SMn(X) are obtained for X=B, Nb, and W as follows:
(3) A linear relation with the correlation coefficient -0.83 is observed between εMn(X) and nX, eff..
(4) The relations η Mn(X)=120εMn(X) and σMn(X)=63.1εMn(X) obtained in the present work yield the quantitatine relation between εMn(X) and temperature, the very low characteristic temperature of the solution, and the value TσMn(X)/ηMn(X) being close to unity. These relations and quantities are very different in magnitude from those of εN(X) or εH(X).
