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<p>This study presents the first systematic investigation of Fe and Co additions on the structure-property relations in (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>M<sub>5</sub> (M = Fe, Co) ternary alloys. The alloys were fabricated using vacuum arc melting and characterized by XRD, SEM/EDX, DSC, DTA, VSM and Vickers microhardness measurements. XRD analysis revealed larger crystallite sizes for (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>Fe<sub>5</sub> (29.40&#xa0;nm) compared to (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>Co<sub>5</sub> (26.11&#xa0;nm), and the phases observed in both alloys are consistent with the Ni–Si binary phase diagram. SEM observations corroborated these findings, displaying regular, parallel lamellar structures for (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>Fe<sub>5</sub> and irregular dendritic structures for (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>Co<sub>5</sub>. Thermal analysis demonstrated high stability up to ~ 1100 ℃ for both alloys, with distinct melting behaviors at higher temperatures. VSM measurements revealed soft magnetic properties in both alloys, with the Fe-containing alloy exhibiting higher saturation magnetization (21.97 emu/g) but lower coercivity (2.31 Oe) compared to the Co-containing alloy (8.47 emu/g and 13.24 Oe, respectively). Additionally, Fe substitution enhanced mechanical properties, achieving significantly higher hardness (885.0 ± 61.0 HV) compared to Co substitution (780.6 ± 51.7 HV). These findings establish novel property–composition correlations in (Ni<sub>80</sub>Si<sub>20</sub>)<sub>95</sub>M<sub>5</sub> alloys, offering valuable insights for designing next-generation soft magnetic materials for advanced applications.</p>

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Structural, Thermal, and Magnetic Properties of Ni-Si Based Soft Magnetic Ternary Alloys with Minor Co and Fe Additions Via Vacuum Arc-Melting

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Sinan Diken,
  • Celal Kursun,
  • Musa Gogebakan

摘要

This study presents the first systematic investigation of Fe and Co additions on the structure-property relations in (Ni80Si20)95M5 (M = Fe, Co) ternary alloys. The alloys were fabricated using vacuum arc melting and characterized by XRD, SEM/EDX, DSC, DTA, VSM and Vickers microhardness measurements. XRD analysis revealed larger crystallite sizes for (Ni80Si20)95Fe5 (29.40 nm) compared to (Ni80Si20)95Co5 (26.11 nm), and the phases observed in both alloys are consistent with the Ni–Si binary phase diagram. SEM observations corroborated these findings, displaying regular, parallel lamellar structures for (Ni80Si20)95Fe5 and irregular dendritic structures for (Ni80Si20)95Co5. Thermal analysis demonstrated high stability up to ~ 1100 ℃ for both alloys, with distinct melting behaviors at higher temperatures. VSM measurements revealed soft magnetic properties in both alloys, with the Fe-containing alloy exhibiting higher saturation magnetization (21.97 emu/g) but lower coercivity (2.31 Oe) compared to the Co-containing alloy (8.47 emu/g and 13.24 Oe, respectively). Additionally, Fe substitution enhanced mechanical properties, achieving significantly higher hardness (885.0 ± 61.0 HV) compared to Co substitution (780.6 ± 51.7 HV). These findings establish novel property–composition correlations in (Ni80Si20)95M5 alloys, offering valuable insights for designing next-generation soft magnetic materials for advanced applications.