The composites of Fe-Si-Al alloy flakes and dielectric polymer fabricated for a new noise suppression filter in high-frequency bands were characterized by transmission and conversion electron Mössbauer spectrometry (TMS and CEMS). The Fe-Si-Al flakes were prepared by sand milling the atomized sendust powder (9.7 wt.% Si, 5.4 wt.% Al, and balance Fe) in n-hexane for several hours and days. The deformed structures were estimated by magnetic hyperfine field (Hin) distributions, and the annealing effects were investigated. The composites of Fe-Si-Al alloy forged for less than 100 hours recovered the high permeability with production of D03 structure after annealing at 650°C for 2 hours in Ar atmosphere. However, the Fe-Si-Al alloy flakes forged for 180 hours gave the broad Hin with high magnetic fields, and were decomposed into α-Fe in the bulk and Fe species dispersed in the interface beneath the Si and Al oxides surface.
|Number of pages||6|
|Publication status||Published - 2003|
- Fe-Si-Al alloy
- Mössbauer spectroscopy
- Noise suppression filter for high-frequency devices
- Polymer composites