Abstract
Fe-based amorphous powders with high magnetic flux density were fabricated in an extremely high cooling rate of over 106 K/s by SWAP. The composition of the alloys studied were Fex(SiyB1-y)98-xC2 {x=73-85 (at%), y=0.2-0.9 (at%)}. The saturation flux density Bs increased with increasing iron content. For Fe83(Si0.3B0.7)15C2, the Bs value was 1.64 T, which is 31 % higher than that of our previously developed (Fe0.97Cr0.03)76(Si0.5B0.5)22C2 alloy. Furthermore, the Fe81(Si0.3B0.7)17C2 powder core exhibited superior magnetic properties compared with our previously developed Fe76 system powder core. The core loss at 100 kHz for Bm=0.1 T was 450 kW/m3. This value was comparable to that of Fe76 system powder core with a lower flux density.
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