Silicon-Oxygen Equilibrium in Liquid Iron

Gokcen, N. A.; Chipman, John

doi:10.1007/bf03397667

Cited by 23 publications

(39 citation statements)

References 7 publications

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“…In logarithmic coordinates the experimental points follow the straight line with a slope Ϫ1/2, which is characteristic of SiO 2 stoichiometry. In contrast to previous works, 2,3) the results of the present study evidence the strong negative deviations from the straight line just above 0.6-0.9 mass% Si. The solubility of oxygen rapidly decreases in the range from 1 up to 10 mass% Si, then, passes through a deep minimum at about 20 mass% Si and, finally, increases with silicon content.…”

Section: Oxygen Solubility In Fe-si Liquid Alloyscontrasting

confidence: 99%

“…Figure 1 compares the results of the present study with those which were reported in literature. [1][2][3][4] In the low silicon range the reasonable agreement is confirmed. In logarithmic coordinates the experimental points follow the straight line with a slope Ϫ1/2, which is characteristic of SiO 2 stoichiometry.…”

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 55%

“…To understand the source of such a disagreement we plotted in Fig. 2 the experimental points of both works 4,9) together with functions (1) and (2). It is clear that within experimental error the raw points are in fair agreement.…”

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 92%

“…This value is much lower than that reported by previous workers. 2,3) In both cited works the analytical samples for oxygen analysis were taken from small ingots (10-40 g), which were quenched in hydrogen stream 2) or cooled down slowly in the furnace.…”

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 99%

“…The further behaviour of oxygen solubility is, however, not reliably established. Goken and Chipman 2) performed measurements up to 15 mass% Si and did not find the minimum. On the contrary, Tszen-Tszi et al 3) reported the minimum at 5-6 mass% Si.…”

Section: Introductionmentioning

confidence: 96%

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Solubility of Oxygen in Iron-Silicon Melts in Equilibrium with Silica at 1873 K

2005

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The solubility of oxygen in iron-silicon melts in equilibrium with silica was measured within the range from 0.1 up to 70 mass% Si at 1 873 K. The experimental procedure involved alloys melting in silica crucibles under argon atmosphere. The sampling was made by melt sucking into quartz tubes, equipped with copper chillers. The oxygen content of analytical samples was determined with inert gas fusion analysis after careful sample preparation. The results obtained were treated by thermodynamic model, which allowed to calculated the activity and solubility of oxygen in Fe-Si melts up to 100 mass% Si.The isotherm of oxygen solubility exhibits both intermediate minimum and maximum at 20 and 85 mass% Si, respectively. The corresponding values of oxygen saturated contents are as follows: 1.4 and 94 mg/g. The activity coefficient of oxygen shows alternating deviations from the additive behaviour. These are positive in the iron rich melts, containing up to 45 mass% Si. In the melts with higher silicon content the deviations from additivity are negative. The following values of interaction parameters were calculated: e

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Section: Oxygen Solubility In Fe-si Liquid Alloyscontrasting

confidence: 99%

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 55%

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 92%

Section: Oxygen Solubility In Fe-si Liquid Alloysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Solubility of Oxygen in Iron-Silicon Melts in Equilibrium with Silica at 1873 K

2005

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A Thermodynamic Model for Representation Reaction Abilities of Structural Units in Full Composition Range of Fe–Si Binary Melts Based on the Atom–Molecule Coexistence Theory

Yang

Zhang

et al. 2013

steel research int.

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Determination of Activity Coefficients of Elements and Related Thermodynamic Properties of FeSi Binary Melts Based on the Atom–Molecule Coexistence Theory

Yang

et al. 2013

steel research int.

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The Raoultian activity coefficient γSi0 of Si and γFe0 of Fe in the infinitely dilute solution of FeSi binary melts at temperatures of 1693, 1773, 1873, and 1973 K have been determined from the calculated mass action concentrations Ni of structural units in FeSi binary melts based on the atom and molecule coexistence theory (AMCT). The activity coefficients of elements γi relative to pure liquid matter as standard state or f%, i referred to 1 mass percentage as standard state or fH, i based on the hypothetical pure liquid matter as standard state have been obtained. The values of first‐order activity interaction coefficient ϵii or eii or hii of Si and Fe related with activity coefficients γi or f%, i or fH, i of Si and Fe are also determined. The standard molar Gibbs free energy change of dissolving liquid element i(l) for forming 1 mass percentage of element i in FeSi binary melts have been deduced in a temperature range from 1693 K to 1973 K. The molar mixing thermodynamic properties, such as molar mixing Gibbs energy change/enthalpy change/entropy change of FeSi binary melts have been reliably determined in a temperature range from 1693 K to 1973 K. The excess values and excess degrees of the above–mentioned molar mixing thermodynamic properties of FeSi binary melts have been also determined based on ideal solution or regular solution as a basis, respectively. The determined molar mixing Gibbs energy change of FeSi binary melts is equal to that based on regular solution as a basis in the full composition range of FeSi binary melts in a temperature range from 1693 K to 1973 K. The partial mixing thermodynamic properties of Si and Fe are not recommended to obtain from the calculated mass action concentration NSi of Si and NFe of Fe as well as the measured activity aR, Si of Si and aR, Fe of Fe in FeSi binary melts.

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Silicon-Oxygen Equilibrium in Liquid Iron

Cited by 23 publications

References 7 publications

Solubility of Oxygen in Iron-Silicon Melts in Equilibrium with Silica at 1873 K

Solubility of Oxygen in Iron-Silicon Melts in Equilibrium with Silica at 1873 K

A Thermodynamic Model for Representation Reaction Abilities of Structural Units in Full Composition Range of Fe–Si Binary Melts Based on the Atom–Molecule Coexistence Theory

Determination of Activity Coefficients of Elements and Related Thermodynamic Properties of FeSi Binary Melts Based on the Atom–Molecule Coexistence Theory

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