Thermodynamic Analysis of Fe-Al-O Liquid Alloy Equilibrated with &amp;alpha;-Al&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;(s) by an Associated Solution Model

Wasai, Kyoko; Mukai, Kusuhiro

doi:10.2320/jinstmet1952.52.11_1088

Cited by 14 publications

(17 citation statements)

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“…The s Fe-i calculated from the molar enthalpies of aluminas, H i°, 14) using Eqs. (3-10)- (3)(4)(5)(6)(7)(8)(9)(10)(11)(12) are shown as functions of temperature in Fig. 3.…”

Section: Classical Homogeneous Nucleation Theorymentioning

confidence: 99%

“…The dependence of the interfacial free energy on the curvature of alumina of small nucleus, s°F e-i , can be assumed from the next equation. 12,18) s°F e-i /s Fe-i ϭ(1/V i )/{(2G/r)ϩ(1/V i )} , ....... (3-21) where G is the surface excess and is assumed to be…”

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

“…From Eqs. (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)-(3-21), the s°F e-i s, which depend on oxygen content and curvature of alumina nucleus, can be calculated.…”

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

“…12,13) The calculated values of DG are shown in Fig. 5 for nucleation in liquid iron containing initial contents of 0.1 mass% Al and 0.0200 mass% O at 1 873 K for the case where n 0 ϭ10 16 .…”

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

“…In an earlier report, 12) the present authors proposed the presence of alumina-associated compounds in the liquid iron in equilibrium with solid a-alumina, and developed an associated solution model. The model showed that reasonable explanations could be obtained for both the thermodynamic properties and the inconsistencies in the measurements obtained in various studies of liquid iron.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis on Metastable Alumina Formation in Aluminum Deoxidized Iron Based on Ostwald's Step Rule and Classical Homogeneous Nucleation Theories.

Wasai

Mukai

2002

ISIJ International

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A mechanism for the formation of unstable alumina (d, g, and k-alumina) in Al-deoxidized iron has been investigated on the basis of Ostwald's Step Rule and two homogeneous nucleation theories. The two homogeneous nucleation theories include a simplified theory in widespred use and the other is a modified theory in which the Gibbs free energy change of the parent iron phase is taken into consideration.Comparison of the chemical potential of various aluminas from the standpoint of the Ostwald'sStep Rule showed that the unstable alumina could form from the liquid iron alloy supersaturated with oxygen. Moreover, the rule revealed that there is a possibility of liquid alumina formation. The two homogeneous nucleation theories also proved the possibility of the formation of unstable and liquid alumina. The latter nucleation theory indicated the easier nucleation of liquid and unstable aluminas than that for a-alumina from the liquid iron containing oxygen contents in excess of the critical value of nucleation at 1 873 K. In contrast, nucleation was rare for oxygen contents less than the critical point at 1 873 K. However, unstable alumina can be formed during cooling and solidification since the oxygen contents of the critical point decreases with temperature decrease. When iron solidifies whilst in the supercooled condition, the nucleation rates of unstable and liquid alumina can be accelerated as a result of the oxygen enrichment at the solidifying front. The authors propose a mechanism of the network-like or coral like inclusion formation by taking into consideration of the liquid alumina formation.

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“…The s Fe-i calculated from the molar enthalpies of aluminas, H i°, 14) using Eqs. (3-10)- (3)(4)(5)(6)(7)(8)(9)(10)(11)(12) are shown as functions of temperature in Fig. 3.…”

Section: Classical Homogeneous Nucleation Theorymentioning

confidence: 99%

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

“…From Eqs. (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)-(3-21), the s°F e-i s, which depend on oxygen content and curvature of alumina nucleus, can be calculated.…”

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

Section: Modified Classical Homogeneous Nucleationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis on Metastable Alumina Formation in Aluminum Deoxidized Iron Based on Ostwald's Step Rule and Classical Homogeneous Nucleation Theories.

Wasai

Mukai

2002

ISIJ International

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Aluminium – Iron – Oxygen

Kubaschewski¹,

Schmid–Fetzer²,

Рохлин³

et al. 2008

Landolt-Börnstein - Group IV Physical Chemistry

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An analysis of the specific heat capacity of liquid Au-Sn alloy based on the ideal-associated solution model

1995

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Tile specific heat capacity of Au Sn liquid alloy was analyzed using tile ideal associated solution model assuming associated compotmds Au~Sn, AuSn, and AuSn,. Based on this model, all of the specific heat capacity, heat of mixing. and activity are described over a wide temperature range. Further, it became clear that the st.ruination of mole numbers of tile species in the liquid alloy shows a minium at the stoichiometric composition of Au3Sn. which implies that the liquid is tile most ordered at this composition.

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Thermodynamic Analysis of Fe-Al-O Liquid Alloy Equilibrated with α-Al<SUB>2</SUB>O<SUB>3</SUB>(s) by an Associated Solution Model

Cited by 14 publications

References 0 publications

Thermodynamic Analysis on Metastable Alumina Formation in Aluminum Deoxidized Iron Based on Ostwald's Step Rule and Classical Homogeneous Nucleation Theories.

Thermodynamic Analysis on Metastable Alumina Formation in Aluminum Deoxidized Iron Based on Ostwald's Step Rule and Classical Homogeneous Nucleation Theories.

Aluminium – Iron – Oxygen

An analysis of the specific heat capacity of liquid Au-Sn alloy based on the ideal-associated solution model

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