Magnetic Properties of Sintered Fe50Co50 Powder Cores

D. Olekšákováa, P. Kollár b, J. Füzer b, F. Onderko b, S. Dobák b, J. Viňáš c, M. Fáberová d and R. Bureš d aDepartment of Applied Mathematics and Informatics, Faculty of Mechanical Engineering, Technical University in Košice, Letná 9, 042 00 Košice, Slovakia bInstitute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia cDepartment of Engineering Technologies and Materials, Faculty of Mechanical Engineering, Technical University in Košice, Mäsiarská 74, 040 01 Košice, Slovakia dInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia

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We investigated coercivity, total losses and complex permeability of sintered Fe-Co powder cores to detect magnetization processes performing in ac magnetic field. The Fe-Co solid solution alloy powders with 50:50 wt% ratio were prepared by 1, 15, and 20 h alloyed mixture of pure chemical elements in planetary ball mill. The resulting powder was subsequently sintered into a disk form. The compaction was performed at a pressure of 800 MPa for 5 min at temperatures of 400°C, 500°C and 600°C in vacuum oxidation protective atmosphere, with pressure of 5×10-3 Pa. The best magnetic properties exhibit sample prepared from 1 h alloyed powder, compacted at 600°C.

DOI: 10.12693/APhysPolA.131.807 PACS numbers: 75.50.Vv, 85.70.-w, 75.50.Bb