Activity of silicon in liquid Fe-Si and Fe-C-Si alloys

Chipman, John; Fulton, James C.; Gokcen, N. A.; Caskey, G.R.

doi:10.1016/0001-6160(54)90064-4

Cited by 99 publications

(145 citation statements)

References 6 publications

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“…Chipman et al 1,2) investigated extensively the two-fold saturations in Fe-Si-C system, and Fig. 6 reproduces their experimental results.…”

Section: The C Solubility Of Fe-si-c Ternary Systemsupporting

confidence: 60%

“…Therefore, the accurate information of the standard Gibbs free energy of formation of SiC, , is necessary to correctly describe the solution behaviors of Fe-Si-C system. However, the values reported by Chipman et al, 1) Turkdogan,8) Barin, 9) Pankratz, 10) Lacaze et al 11) and JANAF 12) do not agree among themselves, and, more importantly, do not reproduce the experimentally determined twofold saturations of C and SiC. 1,2,5,6) This study is to determine the correct value for the and to develop a solution model in Unified Interaction Parameter formalism, 13,14) which reproduces confidently the experimental results of Fe-Si-C melt.…”

Section: Introductionmentioning

confidence: 83%

“…According to the convention by UIP formalism, one of the elements is chosen as solvent and the others as solutes. The activity coefficients of solvent and solutes are expressed in terms of compositions as follows, ...... (1) ....... (2) where εjk, εjkl, εjklm, εij, εijk, εijkl are interaction parameters. In this study, Fe is taken as solvent, and Si and C as solutes.…”

Section: Unified Interaction Parameter (Uip) Formalismmentioning

confidence: 99%

“…The solubility of C in the Fe-Si-C melt was determined experimentally by Chipman et al, [1][2][3] Schurmann et al, 4) Kawanishi et al, 6) and Sanbongi et al 7) Their results are presented in Fig. 5.…”

Section: The C Solubility Of Fe-si-c Ternary Systemmentioning

confidence: 99%

“…Many investigators examined the solution properties of Fe-Si-C melt. [1][2][3][4][5][6][7] Because of their specific processing interests, their results are limited in compositions and temperatures and not sufficient enough to describe the solution properties for the entire composition range of Fe-Si-C system.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Assessment of Liquid Fe–Si–C System by Unified Interaction Parameter Model

et al. 2014

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The solution behaviors of Fe-Si-C system are characterized by the formation of SiC, and the properties are defined by the value of the standard Gibbs free energy of formation of SiC,. However, a review shows that reported values of do not agree among the investigators and are shown a significant discrepancy among them as high as 16 kJ/molSiC. In order to resolve this uncertainty, new value of is assessed by reproducing experimentally determined two-fold saturation data with the UIP modeling FeSi-C melt. The proposed value of is given by following equation.With the proposed , the UIP model for Fe-Si-C system was developed from the experimentally determined solubility of C and two-fold saturations of C and SiC taken from the literature reported. The resulting activity coefficients are expressed as follows: The model reproduces well the experimentally determined C solubility as well as the two-fold saturation of C and SiC. It also describes well the solution behaviors in a wide range of compositions and temperatures, permitting its use for various applications such as ironmaking, steelmaking, cast-iron, Si-based ferroalloys, and the low temperature liquid phase growth of electronic grade silicon carbide.KEY WORDS: activity coefficients of Fe, Si, and C; standard Gibbs free energy of formation of SiC; unified interaction parameter model.

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“…Chipman et al 1,2) investigated extensively the two-fold saturations in Fe-Si-C system, and Fig. 6 reproduces their experimental results.…”

Section: The C Solubility Of Fe-si-c Ternary Systemsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 83%

Section: Unified Interaction Parameter (Uip) Formalismmentioning

confidence: 99%

Section: The C Solubility Of Fe-si-c Ternary Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Assessment of Liquid Fe–Si–C System by Unified Interaction Parameter Model

et al. 2014

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Gibbs energy of formation of sic: A contribution to the thermodynamic stability of the modifications

Kleykamp

1998

Ber Bunsenges Phys Chem

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The Gibbs energy of formation ΔfGo of hexagonal α‐SiC was determined by electromotive force (emf) measurements between 1200 and 1300 K using the galvanic cell Si, SiO2|Th(Y)O2|SiO2, α‐SiC, C which gives (T in K): ΔfGo (α‐SiC) =‐94770+24.24·T J/mol. The third‐law enthalpy of formation was calculated as ΔfHo298 (α‐SiC)=‐74.4 kJ/mol at 298 K. In order to examine more closely the relative stability of α‐SiC and cubic β‐SiC, Gibbs energy of transformation ΔtrG measurements were made by the same method between 1100 and 1300 K using the cell β‐SiC, C, SiO2|Th(Y)O2|SiO2, C, α‐SiC. An emf of about 20 mV of the meta‐stable cell was measured up to 5 h cell operation. This observation implies that α‐SiC is the more stable modification in the investigated temperature range yielding ΔtrG (βα‐SiC) ≈︁ −8 kJ/mol at 1200 K.

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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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Activity of silicon in liquid Fe-Si and Fe-C-Si alloys

Cited by 99 publications

References 6 publications

Thermodynamic Assessment of Liquid Fe–Si–C System by Unified Interaction Parameter Model

Thermodynamic Assessment of Liquid Fe–Si–C System by Unified Interaction Parameter Model

Gibbs energy of formation of sic: A contribution to the thermodynamic stability of the modifications

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

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