Mössbauer study on Fe-Si-Al flakes-polymer composites for noise filter at high frequency bands

Kiyoshi Nomura, Kei Suzuki, Tsuguo Sawada, Yusuke Ujihira, Shigeyoshi Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

The composites of Fe-Si-Al alloy flakes and dielectric polymer were mainly characterized by transmission and conversion electron Mössbauer spectrometry (TMS and GEMS). The Fe-Si-Al flakes were prepared by milling the Sendust powder (9.8mass%Si, 5.9mass% Al, and balance Fe) in n-hexane solvent for several hours and days. The deformed structures were estimated by magnetic hyperfine field distributions, and further the annealing effects were investigated. The composites of Fe-Si-Al alloy forged for less than 100 hours recovered high permeability with production of D03 structure after annealed at 650 °C for 2 hours in Ar atmosphere. However, the polymer composites of Fe-Si-Al alloy flakes forged for 180 hours, which could apply to new noise suppression filter in several GHz frequency bands, gave broad hyperfine distributions with high magnetic fields. The forged flakes were decomposed into α-Fe in the bulk and Fe species dispersed in Si or Al interface beneath the Si and Al oxides surface by annealing.

Original languageEnglish
Pages (from-to)260-265
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume50
Issue number4
DOIs
Publication statusPublished - 2003 Apr

Keywords

  • Mössbauer spectroscopy
  • Noise suppression filter for high frequency bands
  • Sendust alloy-polymer composites

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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