Elaboration and Characterization of WMoTaNb High Entropy Alloy Prepared by Powder Metallurgy Processes |
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Authors: | Mathias Moser,Sarah Dine,Dominique Vrel,Loï c Perriè re,Ré my Pirè s-Brazuna,Hervé Couque,Fré dé ric Bernard |
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Affiliation: | 1.Nexter Munitions, 7 Route de Guerry, 18000 Bourges, France;2.Université de Bourgogne Franche-Comté, ICB–UMR 6303 CNRS, 21000 Dijon, France;3.Université Paris 13, LSPM–UPR 3407CNRS, 93430 Villetaneuse, France;4.Université Paris Est Creteil, CNRS, ICMPE, UMR7182, 94320 Thiais, France |
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Abstract: | This work concerns the sintering of tungsten-based (i.e WMoTaNb) high entropy alloy (HEA) powders using the spark plasma sintering (SPS) technique and their mechanical properties. The synthesis was performed by a self-propagating high-temperature synthesis (SHS) type reaction in which the mixture of metallic oxides (WO3, MoO3 …) is reduced by magnesium. For this, a specific reactor has been developed. Different conditions including the addition of a moderator were tested. These powders are then densified by SPS technology which allows for keeping the initial microstructure of the powder. The optimization of sintering conditions was performed with the objective to control simultaneously the chemical composition, the grain growth and the densification stages. |
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Keywords: | high entropy alloy self-propagating high-temperature synthesis spark plasma sintering |
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