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<p>We report the synthesis and evaluation of the structural, magnetic, and radiation shielding properties of (FeCoCr)<sub>94</sub>Al<sub>6</sub> high-entropy alloys (HEAs) produced via mechanical milling. Phase identification and microstructural analysis using X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the formation of a single-phase bcc solid solution after 20&#xa0;h of milling. Energy dispersive X-ray spectroscopy (EDS) verified the alloy’s composition and purity. Magnetic properties were characterized through room-temperature hysteresis loops and temperature-dependent magnetization measurements (300–800&#xa0;K) using a Quantum Design PPMS equipped with a vibrating sample magnetometer. The HEAs exhibited soft ferromagnetic behavior with high saturation magnetization and moderate coercivity. Notably, the alloy milled for 7&#xa0;h achieved a saturation magnetization of 151 emu/g and a coercivity of 37 Oe, suitable for soft magnetic applications with reduced energy loss. A high Curie temperature (~ 800&#xa0;K) supports applications at both room and elevated temperatures. Radiation shielding efficiency against gamma and X-rays was also investigated, highlighting the alloy’s potential for nuclear applications due to its radiation attenuation, corrosion resistance, and mechanical strength. These properties make (FeCoCr)<sub>94</sub>Al<sub>6</sub> HEAs promising candidates for multifunctional applications requiring magnetic performance, mechanical robustness, and radiation shielding. By addressing dual demands in nuclear and medical contexts, this study underscores the versatile applicability of HEAs in industrial environments.</p>

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Enhanced magnetic and radiation shielding characteristics of mechanochemically synthesized (FeCoCr)₉₄Al₆ high entropy alloys

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月4日

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  • Telem Şimşek,
  • Tuncay Şimşek,
  • Esra Uyar,
  • Muharrem Pul,
  • Gül Atalı,
  • Gökçen Aslan Aydemir

摘要

We report the synthesis and evaluation of the structural, magnetic, and radiation shielding properties of (FeCoCr)94Al6 high-entropy alloys (HEAs) produced via mechanical milling. Phase identification and microstructural analysis using X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the formation of a single-phase bcc solid solution after 20 h of milling. Energy dispersive X-ray spectroscopy (EDS) verified the alloy’s composition and purity. Magnetic properties were characterized through room-temperature hysteresis loops and temperature-dependent magnetization measurements (300–800 K) using a Quantum Design PPMS equipped with a vibrating sample magnetometer. The HEAs exhibited soft ferromagnetic behavior with high saturation magnetization and moderate coercivity. Notably, the alloy milled for 7 h achieved a saturation magnetization of 151 emu/g and a coercivity of 37 Oe, suitable for soft magnetic applications with reduced energy loss. A high Curie temperature (~ 800 K) supports applications at both room and elevated temperatures. Radiation shielding efficiency against gamma and X-rays was also investigated, highlighting the alloy’s potential for nuclear applications due to its radiation attenuation, corrosion resistance, and mechanical strength. These properties make (FeCoCr)94Al6 HEAs promising candidates for multifunctional applications requiring magnetic performance, mechanical robustness, and radiation shielding. By addressing dual demands in nuclear and medical contexts, this study underscores the versatile applicability of HEAs in industrial environments.