Rui Wang , Qiqi Chen , Xini Xiong , Mengmeng Meng , Shaofeng Yang
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引用次数: 0
Abstract
High-entropy alloys (HEAs), comprised of ferromagnetic metals such as Fe, Co, and Ni, demonstrate remarkable combinations of magnetic and mechanical properties. In this study, we explored the microstructure and magnetic characteristics of SiO2-FeCoNi(AlSi)0.4 core–shell HEAs fabricated via mechanical alloying (MA) and spark plasma sintering (SPS). Thermodynamic analysis revealed that the FeCoNi(AlSi)0.4 core–shell alloy system exhibits a higher ΔS (11.75 kJ/mol), indicating that forming a solid solution structure is easy. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses confirmed the development of a face-centered cubic (FCC) solid solution with a highly deformed nanotwin structure after SPS as-sintered. The vibrating sample magnetometer (VSM) test indicated an elevated soft magnetic behavior for FeCoNi(AlSi)0.4 core–shell HEAs as-sintered, with a magnetic saturation (MS) of 140.2 emu/g and a coercivity field (HC) of 1.35 Oe in an applied magnetic field of 2 T. The ultimate shear strength and tensile strengths were found to be 1552.4 MPa and 1278.9 MPa, respectively. This investigation conclusively highlights that the lower fault energy of the FeCoNi(AlSi)0.4 alloy system significantly influences the mechanical and magnetic properties of HEAs.
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The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public.
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