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Abstract <p>Cast refractory high-entropy alloys based on Nb–Ta–Hf, alloyed with 3d transition metals (Zr, Cr, V, Ti) and lanthanides (Gd, La + Ce), were successfully synthesized using a combined centrifugal casting–SHS method from thermite-type green mixtures containing target metal oxides. XRD and SEM analysis revealed that the primary phase in the synthesized alloys is a bcc solid solution. Introduction of alloying elements resulted in the formation of new structural precipitates, exhibiting bcc, fcc, and hcp structures, thus yielding complex multiphase microstructures.</p>

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Combined Centrifugal Casting–SHS Process of Refractory High-Entropy Nb–Ta–Hf–(Zr,Ti,Cr,V,Mm,Gd) Alloys

  • 期刊论文

  • 发表日期：

    2025年11月27日

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  • V. N. Sanin,
  • D. M. Ikornikov,
  • D. Yu. Kovalev,
  • O. A. Golosova,
  • A. O. Sivakova,
  • S. L. Silyakov

摘要

Abstract

Cast refractory high-entropy alloys based on Nb–Ta–Hf, alloyed with 3d transition metals (Zr, Cr, V, Ti) and lanthanides (Gd, La + Ce), were successfully synthesized using a combined centrifugal casting–SHS method from thermite-type green mixtures containing target metal oxides. XRD and SEM analysis revealed that the primary phase in the synthesized alloys is a bcc solid solution. Introduction of alloying elements resulted in the formation of new structural precipitates, exhibiting bcc, fcc, and hcp structures, thus yielding complex multiphase microstructures.