Sintered magnetic cores of high Bs Fe84.3Si 4B8P3Cu0.7 nano-crystalline alloy with a lamellar microstructure

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Abstract

Fabrication of bulk cores of nano-crystalline Fe84.3Si 4B8P3Cu0.7 alloy with a lamellar type of microstructure is reported. Amorphous ribbon flakes of size ∼1.0-2.0 mm were compacted in the bulk form by spark plasma sintering technique at different sintering temperatures. High density (∼96.4%) cores with a uniform nano-granular structure made from α-Fe (∼31 nm) were obtained. These cores show excellent mechanical and soft magnetic properties. The lamellar micro-structure is shown to be important in achieving significantly lower magnetic core loss than the non-oriented silicon steel sheets, commercial powder cores and even the core made of the same alloy with finer and randomly oriented powder particles.

Original languageEnglish
Article number17A322
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
Publication statusPublished - 2014 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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