Effect of heat treatment process on the structural and soft magnetic properties of Fe38Co38Mo8B15Cu ribbons

ÖZTÜRK S., İÇİN K., GENCTURK M., GÖBÜLÜK M., SVEC P.

JOURNAL OF NON-CRYSTALLINE SOLIDS, cilt.527, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 527
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jnoncrysol.2019.119745
  • Dergi Adı: JOURNAL OF NON-CRYSTALLINE SOLIDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Hitperm-type alloy, Nanostructure, Magnetic properties, CRYSTALLIZATION, CU, MICROSTRUCTURE, NANOCRYSTALS, GLASS, MO
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

In this study, the effect of crystal formation, grain growth and surface properties on magnetic properties via changed with heat treatment process in amorphous Hitperm-type alloy produced by planar flow casting method was investigated. The produced Fe38Co38Mo8B15Cu1 amorphous ribbons were subjected to selected heat treatments. The low temperature and short time heat-treated samples displayed broad, continuous, and low-intensity XRD diffraction peaks and the intensities of the crystalline peaks increased noticeably with increasing time and temperature. The AFM images of as-quenched Fe38Co38Mo8B15Cu1 ribbon surfaces displayed one type of sharp peak raises evenly distributed on the surfaces. The microstructural of the heat-treated samples exhibited nanocrystalline bcc-FeCo grains randomly dispersed in the remaining amorphous matrix. The mean sizes of grains increased from 1.8 nm to 5.6 nm with increasing heat-treatment temperature and time. The saturation magnetization increased from 81 to 135 emu/g with increasing heat-treatment temperature ranging from 300 to 420 degrees C and then decreased to 113 emu/g for 450 degrees C. The coercivity showed the or non-monotonous dependence with increasing annealing time and temperature.