Equilibrium between Titanium and Oxygen in Liquid Fe–Ti Alloy Coexisted with Titanium Oxides at 1873 K
Equilibrium between Titanium and Oxygen in Liquid Fe–Ti Alloy Coexisted with Titanium Oxides at 1873 K
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DOI：
10.2355/isijinternational.46.996
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发表时间：
2006-07
影响因子：
1.8
通讯作者：
Woo-Yeol Cha;T. Nagasaka;Takahiro Miki;Y. Sasaki;M. Hino
中科院分区：
文献类型：
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作者：
Woo-Yeol Cha;T. Nagasaka;Takahiro Miki;Y. Sasaki;M. Hino
研究了1873 K下饱和各种钛氧化物的Fe-Ti合金熔体中Ti和Q的平衡。应用瓦格纳形式和Darken二次形式，用Redlich-Kister型多项式描述混合的过量Gibbs自由能变化，对所得结果进行了解析分析.在1873 K下，根据瓦格纳公式计算了体系的平衡常数和相互作用参数。Ti 2 O3（s）= 2 Ti +3 O（0.5<mass%Ti<6.2）logK =-10.17，eTiO =-0.34 'Ti 3 O 5 '（s）= 3 Ti +5 O（0.0004<mass%Ti<0.36）logK =-16.86，eTiO =-0.34在1873 K下，液态Fe-Ti合金中Ti的亨利常数如下估算。γ° Ti（I）=0.0090在1873 K下，Fe-Ti-O合金熔体的Redlich-Kister型多项式的相互作用参数由下式给出。0 Ω Fe-Ti =-73360/J 0 Ω Ti-O =-1035900/J根据瓦格纳公式和Darken二次多项式公式估算的结果与实验结果吻合较好。
The equilibrium between Ti and Q has been investigated in molten Fe-Ti alloy saturated with various kinds of titanium oxides at 1 873 K. The present results have been thermodynamically analyzed applying Wagner's formalism as well as Darken's quadratic formalism with the excess Gibbs free energy change of mixing described by Redlich-Kister type polynomial. The equilibrium constants and the interaction parameters of Wagner's formalism were given as follows at 1 873 K in the present work. Ti 2 O 3 (s)=2Ti+3O (0.5<mass%Ti<6.2) log K=-10.17, e Ti O =-0.34 'Ti 3 O 5 '(s)=3Ti+5O (0.0004<mass%Ti<0.36) log K=-16.86, e Ti O =-0.34 The Henry constant of Ti in liquid Fe-Ti alloy was assessed as follows at 1 873 K. γ° Ti(I) =0.0090 The interaction parameters of Redlich-Kister type polynomial for molten Fe-Ti-O alloy were given by the following values at 1 873 K in the present work. 0 Ω Fe-Ti =-73 360/J 0 Ω Ti-O =-1 035900/J The estimated results based on Wagner's formalism as well as Darken's quadratic formalism polynomials were well agreed with the experimental results which were observed between Ti and O equilibrium contents in molten Fe-Ti alloy.