共查询到19条相似文献,搜索用时 46 毫秒
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通过拟合过剩偏摩尔自由能与组元浓度的关系式需要的参数,建立起可应用于整个液相区的组元活度解析式。应用此结构计算铁基含磷、然三元系的活度,其结果与报道的数据基本一致。并对报道的方法进行了部分修正。 相似文献
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以碳管炉为加热体。在氩气保护下研究了铁液中镓含量对碳的饱和熔解度的影响。在镓含量为0.11%~9.33%的浓度范围内,通过实验得出了不同温度下铁液中镓含量与碳的饱和溶解度的关系。并根据Schenck的相互作用参数式,得出铁液中碳与镓的相互作用系数与温度的关系式。 相似文献
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锰铁熔体中磷和锰的热力学性质 总被引:6,自引:0,他引:6
通过1400℃下Fe-Mn-C-P系中碳的溶解平衡实验,测定了该熔体中碳的溶解度,应用热力学理论计算出,,,并提出了适用于锰铁熔体中磷和锰的活度系数计算式 相似文献
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通过计算和实验测定,求得了为进行提镓热力学分析计算所必要的势力学参数△G^oGa→[Ga]%,e^GaGa和e^CGa。 相似文献
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CO-CO2混合气与Fe-Nb-C熔体和NbO2(s)的平衡实验是在Al2O3或ZrO2坩埚中进行的。实验表明,在1073~1273K间的低温下产生碳沉积是不可避免的。熔体上方的气相氧分压用固体电解质电池测定。与熔体中Nb成平衡的氧化物被确定为NbO2(s)。测得1823K时反应[Nb]+O2=NbO2(s)的平衡常数K=6.31×1010,因此,可得反应的标准自由能:
ΔG°=-377150(J/mol)
求出了碳对Nb和Nb对碳的活度相互作用系数为:
${\\rm{e}}\\frac{{\\rm{C}}}{{{\\rm{Nb}}}}$=-0.74;${\\rm{e}}\\frac{{\\rm{C}}}{{{\\rm{Nb}}}}$=-0.092 相似文献
ΔG°=-377150(J/mol)
求出了碳对Nb和Nb对碳的活度相互作用系数为:
${\\rm{e}}\\frac{{\\rm{C}}}{{{\\rm{Nb}}}}$=-0.74;${\\rm{e}}\\frac{{\\rm{C}}}{{{\\rm{Nb}}}}$=-0.092 相似文献
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Mn—C—Si系锰基熔体的活度与自由能计算 总被引:1,自引:0,他引:1
实验测定了1673K时Mn-C-Si系熔体中Si对C的溶解度的影响,计算得到锰基熔体中一阶和二阶活度相互作用系数以及C在Mn液中的标准溶解自由能值。 相似文献
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Thermodynamics of Fe-P-C in Mn-Based Solutions 总被引:2,自引:0,他引:2
ThermodynamicsofFe┐P┐CinMn┐BasedSolutionsChenErbao①,YuXuebin②,DongYuanchi①,GuoShangxing①ABSTRACTThesolubilitiesofcarboninMn-... 相似文献
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Carbon solubility in Mn Fe melts (xMn =0. 083-0. 706, XFe =0. 034-0. 715) was measured experimentally at various temperatures. By thermodynamic derivation and calculation, the relationship between activity coefficient of carbon in infinite dilute solution of manganese in Mn-C system and temperature was obtained. Using Gibbs-Duhem relationship, the experimental results of this study, and experimental data obtained by strict thermodynamic derivation and calculation in references, the relationships between other thermodynamic properties (εCC, εCCC, εCFe, εCCFe, and εCFeFe) in Mn-Fe-C system and temperature were obtained. 相似文献
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The solubility of carbon in the Fe‐Mn‐C system was measured under reduced pressure of 1 Pa at 1573 K and 1673 K, respectively. The carbon solubility in terms of mole fraction in the iron based solution was found varying with manganese mole fraction in the solution and with temperature, as xC= 0.1819 + 0.2531 xMn at 1573 K and xC = 0.1981 + 0.2515xMn at 1673K. Manganese has a stronger influence on the carbon solubility at lower pressure than it has at higher pressure. The pressure was found to have an insignificant effect on the carbon solubility when manganese in the melt was absent. The activity interaction parameters between manganese and carbon in the alloy were determined from carbon solubilities at 1573 and 1673 K. Analysis of the experimental results showed that under vacuum conditions, the activity interaction parameter of manganese with carbon is higher than that at atmospheric pressure. 相似文献
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含碳铬矿球团还原热力学研究 总被引:3,自引:0,他引:3
本文介绍了含碳西藏铬矿球团的还原顺序。X射线衍射证明:还原温度低于1200℃时,还原产物是Fe及Cr_2O_3;还原温度高于1200℃时,还原产物是Fe、Fe_3C、(Cr,Fe)_7C_3,在还原初期阶段生成的Fe转变成Fe_3C_,最终转变成(Cr,Fe)_7C_3;当还原温度高于1300℃时,发现有MgAl_2O_4,MgSiO_4生成,热力学计算的结果与X射线衍射结果相符。 相似文献