Experimental determination of phase diagram involving silicides in the Fe-Si binary system
Experimental determination of phase diagram involving silicides in the Fe-Si binary system
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DOI：
10.1016/j.jallcom.2022.165810
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发表时间：
2022-10-25
影响因子：
6.2
通讯作者：
Kainuma, R.
中科院分区：
文献类型：
--
作者：
Han, K.;Saito, M.;Kainuma, R.
利用FE-EPMA/WDS和DSC热分析精确确定了Fe-Si二元系的相图。经证实，与文献相比，β-Fe2Si和zeta(α)-FeSi2相的浓度范围稍窄，并向更高的Fe浓度移动，而其他铁硅化物相的浓度范围较低，但某些浓度范围小于1 at%。 BCC 相中的 A2/B2/D0(3) 有序无序转变和居里温度表现出与 Meco 和 Napolitano 报道的温度一致的浓度依赖性，并且随着 Si 含量的增加，α"-Fe3Si (D0(3)) 合金的居里温度偏离 α-Fe (A2) 相的外推值更高，并在 25 at%Si 的化学计量组成下弯曲。不变的反应温度大多一致。与文献中的相图不同，除了 eta-Fe5Si(3) 相的包析温度外，固相线和液相线显示出较小的差异 (C) 2022 Published by Elsevier B.V.
The phase diagram of the Fe-Si binary system was precisely determined using FE-EPMA/WDS and thermal analysis of DSC. It was confirmed that the concentration ranges of the beta-Fe2Si and zeta(alpha)-FeSi2 phases are slightly narrower and shifted toward higher Fe concentrations compared with the literature, and the other iron-silicide phases have low but certain concentration ranges less than 1 at%. The A2/B2/D0(3) order-disorder transition and Curie temperatures in the BCC phases exhibited concentration dependences consistent with those temperatures reported by Meco and Napolitano, and the Curie temperatures of the alpha "-Fe3Si (D0(3)) alloys deviated higher from the extrapolated values of the alpha-Fe (A2) phase with increasing Si content and bent at the stoichiometric composition of 25 at%Si. Invariant reaction temperatures were mostly coincident with those of the phase diagram in the literature, except for the peritectoid temperature of the eta-Fe5Si(3) phase, whereas a small discrepancy was revealed in the solidus and liquidus lines. (C) 2022 Published by Elsevier B.V.