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Partial Redetermination of the Fe-W Phase Diagram

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Abstract

The objective of the current study is to perform a careful investigation of the (Fe) and (W) solvus and of the intermetallic compounds in the Fe-W system as it could have a significant impact on higher-order systems based on this binary system. Two key alloys, Fe-14 at. pct W and Fe-50 at. pct W, and a diffusion couple were synthesized based on the literature. They were studied by long time annealing experiments with a selected heat treatment route, X-Ray diffraction analysis, and electron microprobe analysis with a careful control of impurity levels of C, Si, and O. The two intermetallic phases μ-Fe7W6 and λ-Fe2W are characterized and the composition range of the μ-Fe7W6 phase is specified. The phase previously reported as FeW is most probably a ternary carbide with low carbon content. An accurate determination of the solubility of W in αFe and of Fe in αW is presented.

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Authors and Affiliations

  1. SIMAP, INP Grenoble-CNRS-UJF, BP 75, 38402, Saint-Martin d’Hères, France

    Annie Antoni-Zdziobek

  2. Eurotungstène, Eramet Group, 9 Rue André Sibellas, BP 152X, 38100, Grenoble Cedex 9, France

    Thierry Commeau

  3. Chimie Métallurgique des Terres Rares, Institut de Chimie et des Matériaux Paris-Est, CNRS, Université Paris-Est Créteil, 2-8 Rue Henri Dunant, 94320, Thiais Cedex, France

    Jean-Marc Joubert

Authors
  1. Annie Antoni-Zdziobek
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  2. Thierry Commeau
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  3. Jean-Marc Joubert
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Correspondence to Annie Antoni-Zdziobek.

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Manuscript submitted August 3, 2012.

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Antoni-Zdziobek, A., Commeau, T. & Joubert, JM. Partial Redetermination of the Fe-W Phase Diagram. Metall Mater Trans A 44, 2996–3003 (2013). https://doi.org/10.1007/s11661-013-1658-2

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