Abstract
•Ribbons with high Bs of 1.39 T and fully amorphous precursor were industrially produced.•Low loss of 179 kW/m3 at 100 kHz and 0.2 T, and high μ' of 24,500 at 100 kHz were obtained.•The alloy exhibits good operating thermal stability in high frequency.
Increasing the saturation magnetic induction (Bs) while maintaining excellent high-frequency magnetic characteristics of nanocrystalline alloys is still a challenge. Herein, Fe76Si13B8Nb2Cu1 alloy ribbons with completely amorphous precursor were industrially prepared with industrial raw materials. This industrialized nanocrystalline alloy with Bs of 1.39 T has a low core loss of 179 kW/m3 at 0.2 T and 100 kHz, which is slightly higher than that of the commercially applied Fe73.5Si13.5B9Nb3Cu1 alloy with low Bs of ∼ 1.24 T but lower than that of other current alloys. Besides, the real part of complex permeability (μ') of the alloy reaches 24,500 at 100 kHz under an applied filed of 0.06 A/m, which is comparable to that of Fe73.5Si13.5B9Nb3Cu1 alloys. Furthermore, the μ' in the operating temperature of 130 °C increase below 9% at 100 kHz and 2% at 200 kHz with respect to μ' at room temperature. Hence, the industrialized alloy with good castability, high-frequency magnetic performance and operating thermal stability has a good application prospect in high-frequency power electronics.