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Experimental Investigation of Phase Equilibria in the Fe-Cr-Si Ternary System

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Abstract

Isothermal sections of the Fe-Cr-Si ternary system at 1000 and 1100 °C were studied using x-ray diffraction, scanning electron microscopy and electron probe micro-analysis. Isothermal sections were identified with seven and six three-phase regions at 1000 and 1100 °C, respectively. The σ phase contains 6.2-20.2 at.% Si at 1000 °C and 8.3-21.2 at.% Si at 1100 °C. Fe and Cr can be entirely substituted by each other to form the continuous solid-solution ε or CrSi phases. The η phase is stable at 1100 °C because of the dissolution of Cr. Additionally, large solubility was detected in some binary compounds, e.g., up to 26.6 and 19.6 at.% Fe in αCr5Si3 and Cr3Si at 1000 °C, respectively.

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Acknowledgments

The authors acknowledge the financial support from the National Key Technologies R&D Program of China (Grant No. 2016YFB0700501), the National MCF Energy R&D Program of China (No. 2018YFE0306100), National Natural Science Foundation of China (Grant Nos. 51871248 and 51671218), State Key Laboratory of Powder Metallurgy Independent Project of China. The authors would like to thank Benjamin Porter, DPhil, from Liwen Bianji, Edanz Editing China for editing the English text of a draft of this manuscript.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, People’s Republic of China

    An-dong Wen, Li-gang Zhang, Li-bin Liu, Yun Zhao, Ling-hong Zheng & Fen-yan Zhao

  2. Faculty of Mechanical Engineering, Koszalin University of Technology, ul. Śniadeckich 2, 75-453, Koszalin, Poland

    Patrick J. Masset

  3. Technallium Engineering & Consulting, Fliederweg 6, 92449, Steinberg am See, Germany

    Patrick J. Masset

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  1. An-dong Wen
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Correspondence to Li-gang Zhang or Li-bin Liu.

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Wen, Ad., Zhang, Lg., Liu, Lb. et al. Experimental Investigation of Phase Equilibria in the Fe-Cr-Si Ternary System. J. Phase Equilib. Diffus. 41, 587–597 (2020). https://doi.org/10.1007/s11669-020-00821-5

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  • DOI: https://doi.org/10.1007/s11669-020-00821-5

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