Spatially Tuned Properties in a Bulk Fe-Co Soft Magnetic Alloy via Transverse Induction Annealing and Feasibility Study for Motor Applications

Article Materials Science, Multidisciplinary

Spatially tuned microstructure and properties in soft magnetic nanocrystalline alloy via transverse-oriented induction heating

Tyler W. W. Paplham et al.

Summary: A novel processing technique involving transverse induction heating is demonstrated to produce microstructure variation in soft magnetic alloys over macroscopic lengths, enabling enhanced permeability engineering at component level with previously unattainable spatial/temporal control of thermal processing. Analytical models of transverse coil fields are developed and compared with results obtained using finite element modeling. Experimental processing applied to amorphous Co-based soft magnetic ribbon provides multiple crystallization events as indicators of a highly inhomogeneous temperature profile, with ribbon geometry playing an important role due to eddy current concentration at ribbon edges.

JOURNAL OF MATERIALS RESEARCH (2023)

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Article Multidisciplinary Sciences

A mechanically strong and ductile soft magnet with extremely low coercivity

Liuliu Han et al.

Summary: Soft magnetic materials are essential for electrical applications and sustainable energy supply, as they can respond to changes in applied magnetic field with low energy loss. However, designing soft magnetic alloys with both high strength and low coercivity is a fundamental challenge. In this study, a Fe-Co-Ni-Ta-Al multicomponent alloy was developed, which contained ferromagnetic matrix and paramagnetic coherent nanoparticles. These nanoparticles impede dislocation motion, enhancing the strength and ductility of the alloy, while maintaining its soft magnetic properties.

NATURE (2022)

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Review Chemistry, Physical

Electromagnetic assisted thermal processing of amorphous and nanocrystalline soft magnetic alloys: Fundamentals and advances

Ahmed Talaat et al.

Summary: This review discusses the rapid thermal processing of amorphous and nanocrystalline soft magnetic alloys in electromagnetic fields, focusing on the effects of heating on structural and magnetic properties. It also presents future development trends and challenges in the field.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Multidisciplinary

Ultrastrong and Ductile Soft Magnetic High-Entropy Alloys via Coherent Ordered Nanoprecipitates

Liuliu Han et al.

Summary: A novel concept of developing bulk SMMs with coherent and ordered nanoprecipitates in a non-equiatomic CoFeNiTaAl high-entropy alloy matrix can significantly enhance both strength and damage tolerance without deteriorating soft magnetic properties. This material exhibits excellent mechanical and soft magnetic properties, making it suitable for electrification in the transport and industry sectors.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical