New Measurements of Fe Solubility in Liquid Mg up to 1450 °C and Reassessment of the Fe-Mg System

IF 1.5 4区材料科学 Q4 CHEMISTRY, PHYSICAL

Journal of Phase Equilibria and Diffusion Pub Date : 2024-10-16 DOI:10.1007/s11669-024-01152-5

Mathias Desseaux, Bruno Gardiola, Jérôme Andrieux, Christophe Le Bourlot, Sébastien Jaud, Rainer Schmid-Fetzer, Olivier Dezellus

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Abstract

To investigate the Mg_Liq ↔ Fe_Sol (Bcc and Fcc) equilibrium up to high temperatures, a suitable protocol for the thermodynamic study of volatile elements was developed. Pure magnesium was melted between 700 and 1450 °C (973 and 1723K) in a low-carbon steel sealed crucible (C35), itself sealed in a tantalum crucible to prevent magnesium leakage. The concentration of iron was characterised by inductively coupled plasma–atomic emission spectroscopy (ICP-AES) and the distribution of iron precipitates was examined by x-Ray tomography. The liquidus composition was measured up to 1450 °C and the results obtained confirm the trend in the literature with, however, significant differences above 1000 °C where a lower Fe solubility is measured in comparison with previous thermodynamic descriptions and the scarce available experimental data in this temperature domain. The existing Calphad model of the binary system was then re-evaluated.

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铁在液态Mg中高达1450°C溶解度的新测量和Fe-Mg系统的重新评估

为了研究高温下的MgLiq↔FeSol （Bcc和Fcc）平衡，开发了一种适用于挥发性元素热力学研究的方案。纯镁在700至1450°C（973至1723K）之间在低碳钢密封坩埚（C35）中熔化，其本身密封在钽坩埚中以防止镁泄漏。用电感耦合等离子体-原子发射光谱（ICP-AES）对铁的浓度进行了表征，并用x射线断层扫描（x-射线断层扫描）检测了铁的析出物分布。液相组成测量到1450°C，得到的结果证实了文献中的趋势，然而，在1000°C以上，与先前的热力学描述和稀缺的实验数据相比，测量到的铁溶解度较低。然后对双星系统的现有Calphad模型进行重新评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Phase Equilibria and Diffusion 工程技术-材料科学：综合

CiteScore

2.50

自引率

7.10%

发文量

审稿时长

1 months

期刊介绍： The most trusted journal for phase equilibria and thermodynamic research, ASM International''s Journal of Phase Equilibria and Diffusion features critical phase diagram evaluations on scientifically and industrially important alloy systems, authored by international experts. The Journal of Phase Equilibria and Diffusion is critically reviewed and contains basic and applied research results, a survey of current literature and other pertinent articles. The journal covers the significance of diagrams as well as new research techniques, equipment, data evaluation, nomenclature, presentation and other aspects of phase diagram preparation and use. Content includes information on phenomena such as kinetic control of equilibrium, coherency effects, impurity effects, and thermodynamic and crystallographic characteristics. The journal updates systems previously published in the Bulletin of Alloy Phase Diagrams as new data are discovered.