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Thermodynamic Properties of Mn-C Melts

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Abstract

Carbon solubility in Mn-Fe melts (xMn = 0.161 − 0.706, xFe = 0.034 − 0.633) 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 reported in references, the relationship between other thermodynamic properties in Mn-C system and temperature were obtained by thermodynamic derivation and calculation.

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Abbreviations

a i :

Activity of component i

a’C:

Calculated activity of carbon

a’Mn:

Calculated activity of manganese

e i j :

Interaction parameter of component j to i (standard state of wi = 0. 01)

I:

Integral constant

M j :

Molar mass of component j

M l :

Molar mass of solvent l

Q:

Effect of the second-order and above second-order terms in Wagner formula

r:

Interrelation coefficient

T:

Absolute temperature

w i :

Mass percent of component i

x i :

Molar fraction of component i

ε ji :

Interaction parameter of j to i (standard state of pure i)

ρ CC :

Second-order interaction parameter of C to C with standard state of graphite

ρ C,CC :

Third-order interaction parameter of C to C with standard state of graphite

γ°i:

Activity coefficient of component i (standard state of pure i and xi→0)

γi:

Activity coefficient of component i (standard state of pure i)

γ’C:

Calculated activity coefficient of carbon

γ’Mn:

Calculated activity coefficient of manganese

References

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Authors and Affiliations

  1. School of Metallurgy and Resources, Anhui University of Technology, Ma’anshan, Anhui, 243002, China

    Er-bao Chen (Master, Professor) & Shi-jun Wang

Authors
  1. Er-bao Chen
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  2. Shi-jun Wang
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Correspondence to Er-bao Chen.

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Foundation Item: Item Sponsored by National Natural Science Foundation of China (50374002)

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Chen, Eb., Wang, Sj. Thermodynamic Properties of Mn-C Melts. J. Iron Steel Res. Int. 15, 1–6 (2008). https://doi.org/10.1016/S1006-706X(08)60021-7

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  • DOI: https://doi.org/10.1016/S1006-706X(08)60021-7

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