溶融鉄およびニッケル中のイットリウムと酸素の平衡

概要

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In order to investigate the equilibrium between yttrium and oxygen in liquid iron and nickel, the deoxidation of yttrium in liquid iron and nickel saturated with yttria has been measured at the temperature ranges from 1600℃ to 1700℃ using the sampling technique. The effect of temperature on the equilibrium constant of the deoxidation reaction in liquid iron was found to be : log K_<Y(Fe)>(=a^2_Y・a^3_O)=-36160/T+7.33 while the deoxidation product of iron, log K'_<Y(Fe)>(=[%Y]^2[%O]^3), was expressed as follows : log K'_<Y(Fe)>=log K_<Y(Fe)>-(-17350/T+3.14)(3[%Y]+11.1[%O]) 0.02<[%Y]<0.11 by the use of the interaction parameter, e^Y_<O(Fe)>=-17350/T+3.14. The temperature dependence of the equilibrium constant for the deoxidation of nickel, log K_<Y(Ni)>, was given by the expression : log K_<Y(Ni)>=-36250/T+6.36 Besides, the deoxidation product of nickel was represented to be : log K'_<Y(Ni)>=log K_<Y(Ni)>+6.47(3[%Y]+11.1[%O]) 0.01<[%Y]<0.11 with the interaction parameter, e^Y_<O(Ni)>=-6.47.
社団法人日本鉄鋼協会の論文
1994-05-01