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<p>This study focuses on the formation and characterization of high-entropy bulk metallic glasses (HE-BMGs) through an equiatomic substitution approach. A series of (Ti<sub>50</sub>Zr<sub>50</sub>)<sub>x</sub>(Co<sub>33</sub>Fe<sub>33</sub>Ni<sub>33</sub>)<sub>100-x</sub> alloys were designed to explore their potential as glass-forming systems. For bulk metallic glass formation, the prediction of amorphous phase stability was carried out using thermophysical parameters (Δ<i>S</i><sub>mix</sub>, Δ<i>H</i><sub>mix</sub>, Ω,<i> δ</i>, VEC, and<i> δ</i>′). Thermal analysis of the alloys revealed high glass-forming ability (GFA), with <i>T</i><sub>g</sub>, <i>T</i><sub><i>x</i></sub>, and ΔT values confirming improved thermal stability. x-ray diffraction (XRD) patterns demonstrated the predominance of amorphous structures with minor intermetallic phases, while SEM investigations revealed typical BMG features, including dendritic and interdendritic regions arising from partial crystallization. EDS mapping confirmed elemental segregation, consistent with compositional complexity in HE-BMGs. Corrosion behavior in NaCl solution was found to depend strongly on Ti and Zr concentration, reflecting their role in passivation and stability. Additionally, wettability studies showed that (Ti<sub>50</sub>Zr<sub>50</sub>)<sub>x</sub>(Co<sub>33</sub>Fe<sub>33</sub>Ni<sub>33</sub>)<sub>100-x</sub> HE-BMGs can effectively tune surface properties. It highlights their promise for applications in protective coatings, structural components, and biointerfaces where both glass-forming ability and surface functionality are critical.</p>

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Investigation on Corrosion Behavior and Wettability of (Ti50Zr50)-(Co33Fe33Ni33)-Based High-Entropy Bulk Metallic Glass Alloys Developed by Equiatomic Substitution

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • Digvijay Singh,
  • Vinod Kumar,
  • Ravinder Singh Joshi

摘要

This study focuses on the formation and characterization of high-entropy bulk metallic glasses (HE-BMGs) through an equiatomic substitution approach. A series of (Ti50Zr50)x(Co33Fe33Ni33)100-x alloys were designed to explore their potential as glass-forming systems. For bulk metallic glass formation, the prediction of amorphous phase stability was carried out using thermophysical parameters (ΔSmix, ΔHmix, Ω, δ, VEC, and δ′). Thermal analysis of the alloys revealed high glass-forming ability (GFA), with Tg, Tx, and ΔT values confirming improved thermal stability. x-ray diffraction (XRD) patterns demonstrated the predominance of amorphous structures with minor intermetallic phases, while SEM investigations revealed typical BMG features, including dendritic and interdendritic regions arising from partial crystallization. EDS mapping confirmed elemental segregation, consistent with compositional complexity in HE-BMGs. Corrosion behavior in NaCl solution was found to depend strongly on Ti and Zr concentration, reflecting their role in passivation and stability. Additionally, wettability studies showed that (Ti50Zr50)x(Co33Fe33Ni33)100-x HE-BMGs can effectively tune surface properties. It highlights their promise for applications in protective coatings, structural components, and biointerfaces where both glass-forming ability and surface functionality are critical.