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Interaction Between Si and N in Solidified Austenitic Fe in 1373–1473 K

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Abstract

In order to investigate the thermodynamic interactions between Si and N in austenitic Fe, equilibrium experiments of Fe–Si foils and N2 gas with controlled partial pressure were carried out at 1373, 1423 and 1473 K. Based on the equilibrium concentration of N in the Fe foil with different Si content, the first order interaction coefficient between Si and N in austenitic Fe could be determined in 1373–1473 K and its temperature dependency was found to be as follows. In the austenitic Fe, Si and N have a positive interaction coefficient value, which has a repulsive relationship with each other. Using interaction between Si and N, the precipitation behavior of various nitrides is to be predicted.

$$e_{{\text{N}}}^{{{\text{Si}}}} = \frac{199.5}{{\text{T}}} - 0.119$$

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Funding

This work was supported by the Dong-A University research fund.

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Authors and Affiliations

  1. Department of Material Science and Engineering, Dong-A University, Busan, 49315, Republic of Korea

    Jun Ik Jang & Youngjo Kang

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  1. Jun Ik Jang
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  2. Youngjo Kang
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YK conceived of and designed the study, JJ carried out the experiments, JJ and YK analyzed the results and wrote the main manuscript.

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Correspondence to Youngjo Kang.

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Jang, J.I., Kang, Y. Interaction Between Si and N in Solidified Austenitic Fe in 1373–1473 K. Met. Mater. Int. 27, 4814–4819 (2021). https://doi.org/10.1007/s12540-020-00696-8

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  • DOI: https://doi.org/10.1007/s12540-020-00696-8

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