Electrochemical Polishing of Thin Metallic Glass Ribbons

  • Ferenc ZámborszkyEmail author
  • Éva Fazakas
  • Elek Csizmadia
  • Márk Patrik Kovács
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Soft magnetic inductive components with low power losses are forming the vital part of modern power electronic and electrotechnical equipment such like wind turbines, solar inverters, industrial drives, and vehicles. Ribbons of thin metallic glass produced by planar flow casting and annealed into nanocrystalline structure are successful in achieving superb properties like ultralow coercitive force (Hc ~ 1 A/m), wide range of adjustable relative permeability (µr ~ 1000–200,000), and wide operational temperature range (Top ~ 77–473 K). In this report, we present investigations on electrochemically polished ribbons. Reduction of surface roughness from 1–2 µm to 200–400 nm was revealed by atomic force microscopy. Small core samples made of the ribbons were annealed in transversal magnetic field. Frequency dependence of complex permeability and power losses of these samples confirm that electrochemical polishing did not cause deterioration of the soft magnetic properties.


Fe-based nanocrystalline alloys Electrolytic surface treatment Soft magnetic cores Power electronics Energy efficiency 



We are grateful for Magnetec-Ungarn Kft for the financial support of the experiments, for Bay Zoltán Nonprofit Kft for Applied Research for providing access to the microscopes, and for Miskolc University Institute of Physical Metallurgy, Metalforming and Nanotechnology for providing access to the AFM. We thank to Anita Heczel and Zoltán Palánki for the useful discussions.


  1. 1.
    Yoshizawa Y, Oguma S, Yamauchi K (1988) New Fe-based soft magnetic alloys composed of ultrafine grain structure. J Appl Phys 64:6044. Scholar
  2. 2.
  3. 3.
    Zámborszky F, Tóth D, Palánki Z, Csizmadia E (2014) Electrical and calorimetric power loss measurements of practically ideal soft magnetic cores. IEEE Trans Magn 50:6300604. Scholar
  4. 4.
    Li Zhun, Yao Kefu, Li Deren, Ni Xiaojun, Lua Zhichao (2017) Core loss analysis of Finemet type nanocrystalline alloy ribbon with different thickness. Prog Nat Sci Mater Int 27:588. Scholar
  5. 5.
    Butvinová B, Butvin P, Matko I, Kadlecíková M, Kuzminski M, Svec P Jr (2014) Surface mediated impact of thermal treatment ambience on magnetic properties of Fe–Nb–Cu–B–Si nanocrystalline ribbons. Appl Surf Sci 301:119. Scholar
  6. 6.
    Sabolek S, Babic E, Popovic S, Marhonic Z (2003) Effects of etching on the soft magnetic properties of nanocrystalline Fe73.5Cu1Nb3Si15.5B7 ribbon. J Magn Magn Mater 261:269.
  7. 7.
    Zivotsky O, Postava K, Hrabovská K, Hendrych A, Pistora J, Kraus L (2008) Depth-sensitive characterization of surface magnetic properties of as-quenched FeNbB ribbons. Appl Surf Sci 255:3322. Scholar
  8. 8.
    Lee S-J, Lai J-J (2003) The effects of electropolishing (EP) process parameters on corrosion resistance of 316L stainless steel. J Mater Proc Tech 140:206. Scholar
  9. 9.
    Csizmadia E, Varga LK, Palanki Z, Zamborszky F (2015) Creep or tensile stress induced anisotropy in FINEMET-type ribbons? JMMM 374:587. Scholar
  10. 10.
    Hilzinger R, Rodewald W (2013) Magnetic materials: fundamentals, products, properties applications. Wiley Publishing, USA. ISBN 978-3-895-78352-4Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Ferenc Zámborszky
    • 1
    Email author
  • Éva Fazakas
    • 2
  • Elek Csizmadia
    • 1
  • Márk Patrik Kovács
    • 1
  1. 1.Magnetec-Ungarn KftGyöngyösHungary
  2. 2.Department ofBudapest University of Technology and EconomicsGyöngyösHungary

Personalised recommendations