Kebing Wang , Chen Wu , Lingfeng Wang , Xinyang Zhang , Qiming Chen , Mi Yan
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引用次数: 0
Abstract
Nanocrystalline soft magnetic alloys featuring with amorphous-nanocrystalline dual-phase structure are critical for energy conversion and transportation at elevated frequencies. Their applications however, are refrained by limited saturation magnetic flux density (Bs) due to unavoidable addition of a considerable quantity of non-magnetic elements for glass forming ability (GFA). Furthermore, engineering of the amorphous-nanocrystalline microstructure is critical for the coercivity (Hc), which urges development of advanced approach. In this study, a deep supercooling solidification has been proposed, which not only promotes the formation of short-range packing and icosahedron/icosahedron-like structures for enhanced GFA, but also induces an optimized microstructure consisting of highly disordered amorphous matrix to facilitate nanograin refinement. Based on such strategy, Finemet-based nanocrystalline alloy with superior magnetic properties (Bs = 1.71 T, Hc = 5.0 A/m) has been achieved without additional glass forming element. Such superior performance is correlated to the unique magnetic domain structure involving straight domain walls and smooth movement. The deep supercooling strategy not only breaks the trade-off between the Bs and GFA to allow the design of nanocrystalline alloys with large ferromagnetic content, but also serves as an effective method for microstructure optimization for nanocrystalline alloys.
期刊介绍:
Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry.
The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.