Research Progress in Soft-magnetic Co-based Bulk Metallic Glasses
JU Shuaiwei, LI Yanhui, ZHANG Wei
Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Abstract: Co-based metallic glasses possess high thermal stability, high strength and hardness, and excellent soft magnetic properties including low coercivity, high permeability, low core loss, and low saturation magnetostriction. Especially, the remarkably high permeability and low core loss in high frequency make the Co-based metallic glasses great values in industrial application. In comparison with Fe-based metallic glasses, the alloy systems of the Co-based metallic glasses are fewer, and the glass-forming ability (GFA) and saturation magnetization are lower, which limit the scope of application. In recent years, materials researchers have developed series of Co-based bulk metallic glass (BMG) systems, and conducted extensive and in-depth research on the glass-forming mechanism, GFA, supercooled liquid stability, crystallization behavior, magnetic and mechanical properties of the Co-based BMGs. In this paper, we have reviewed the research progress in the soft-magnetic Co-based BMGs, and discussed the development orientations of the Co-based BMGs in the future.
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