溶融 Ni および Ni-Fe 合金中のアルミニウムと酸素の平衡

概要

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The deoxidation equilibrium of aluminum in liquid nickel saturated with solid alumina has been measured at the temperature ranging from 1823 K to 1973 K using the sampling technique with a view to understanding the equilibrium between aluminum and oxygen in liquid nickel. The temperature dependence of the equilibrium constant for the deoxidation reaction was presented to be log K_<Al(Ni)>(=log a^2_<Al>・a^3_O/a_<Al_2O_3>)=-28770/T+1.67 1823∿1973 K while the deoxidation product, log K'_<Al(Ni)>(=log[%Al]^2[%O]^3), was expressed as follows : log K'_<Al(Ni)>=log K_<Al(Ni)>+1.47(3[%Al]+3.4[%O]) Al<1.1 mass%, 1823∿1973 K The deoxidation of liquid nickel-iron binary alloys with aluminum was measured up to 50 mass pct iron. The activity coefficients of aluminum and oxygen in nickel-iron alloys based on pure liquid nickel were estimated by the following equation : log f^<Fe>_<O(Ni)>+2/3log f^<Fe>_<Al(Ni)>=-0.028[%Fe] up to around 10 mass pct iron at 1923 K.
社団法人日本鉄鋼協会の論文
1995-01-01