Title :
Soft-Magnetic Fe-Based Nano-Crystalline Thick Ribbons
Author :
Lee, Mou-Chen ; Lin, Chih-Yuan ; Wang, Shuo-Hong ; Chin, Tsung-Shune
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu
Abstract :
Fe-based nano-crystalline thick ribbons (up to 150 mum) with excellent soft magnetic properties were developed in Fe71B22TaxY6-xAg1 alloys (x=1 ~ 5) alloys. The design of these Fe-based alloys was based on a ternary bulk metallic glass (BMG) Fe-B-Y system; Ta and Ag were added to achieve optimal nano-crystallization and to improve soft magnetic properties. An optimal composition Fe71B22Ta5Y1Ag1 was worked out showing good glass forming ability, and sound soft magnetic properties after nano-crystallization at 615degC for 5 min: saturation magnetization 1.44 T (152 emu/g), coercivity 35 A/m, and effective permeability at 1 kHz higher than 28000. The nanocrystalline Fe23B6 phase was found to be magnetically soft in these thick ribbons.
Keywords :
barium alloys; coercive force; crystallisation; iron alloys; magnetic permeability; nanostructured materials; silver alloys; soft magnetic materials; tantalum alloys; yttrium alloys; Fe71B22TaxY6-xAg; coercivity; effective permeability; glass forming ability; optimal nanocrystallization; saturation magnetization; size 150 mum; soft-magnetic nanocrystalline thick ribbons; temperature 615 C; ternary bulk metallic glass; time 5 min; Fe-based thick ribbon; magnetic losses; nano-crystalline; soft-magnetic;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2008.2001496
