Fabrication and soft magnetic properties of rapidly quenched Co-Fe-B-Si-Nb ultra-thin amorphous ribbons

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:483

Article

Masood, Ansar¹  Baghbaderani, Hasan Ahmadian¹  Strom, Valter²  Stamenov, Plamen^3,4  McCloskey, Paul¹  Mathuna, Cian O.¹  Kulkarni, Santosh¹ 

[1] Univ Coll Cork, Microsyst Ctr, Tyndall Natl Inst, Cork, Ireland

[2] KTH Royal Inst Technol, Mat Sci & Engn Dept, Stockholm, Sweden

[3] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland

[4] Trinity Coll Dublin, CRANN, Dublin 2, Ireland

关键词: Amorphous metals;    Ultra-thin ribbons;    Soft-magnetic properties;    High-frequency applications;   

DOI  :  10.1016/j.jmmm.2019.03.079

来源: Elsevier

【 摘 要 】

Ultra-thin soft magnetic amorphous ribbons of Co-Fe-B-Si-Nb alloy were synthesised by a single step rapid-quenching approach to acquire advantage of improved material performance and lower costs over commercial amorphous alloys. The amorphous ribbons of approximately 5.5 mu m thicknesses were quenched by a single roller melt spinner in a single-step production process and characterised for their structural and magnetic properties. The disordered atomic structure of amorphous ribbons was confirmed by the X-ray diffraction. A surface morphology study revealed the continuity of ultra-thin ribbons without pores over a large scale. The amorphous alloy showed the ultra-soft magnetic properties in the as-quenched state. The observed thickness dependency of the magnetic properties was attributed to the increased surface roughness and possibly due to a lack of densely packed atomic structure resulting from the extremely high cooling rates experienced by ultra-thin ribbons. We propose that in-situ thinning process of amorphous ribbons significantly reduces the basic material cost and eliminates the need for post-processing steps; hence it provides the opportunity for mass production of high-performance soft magnetic amorphous ribbons at relatively lower costs.

【 授权许可】

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