| 研究実績の概要 |
We have successfully fabricated Fe-based amorphous/nanocrystalline alloys which have high saturation magnetization, high permeability and low coercivity. The low temperature pre-annealing introduces nanocrystalline into the as cast amorphous which prevents coarse grains and avoids the difficult high-temperature controlling.
Cryogenic thermal cycling (CTC) was carried on the pre-annealed amorphous/nanocrystalline alloys to modify the structure and soft magnetic properties. We have got basically first effect of the CTC process by confirmed from TEM analysis, that is inducing structural disordering, the specific performance is refining of crystalline grains. The induced crystalline from pre-annealing process was transformed to amorphous structure after CTC process.
Excellent magnetic properties like, high saturation magnetization, high effective permeability and low coercivity were obtained in the Fe-based alloys after the CTC process.
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