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The synthetical soft magnetic properties including d.c. and a.c. magnetic properties and pulse magnetic property are reported for a newly-developed nanocrystalline Fe73.5Cu1 Nb1.5V1.5Si13.5B9 alloy The new alloy possesses high d.c. relative initial permeability of 12.5×104 and low coerciv ity of 0.54 A/m. Under the conditions of Bm=0.3 T, f=100 kHz and Bm=0.2 T, f=200 kHz the core losses of the new alloy are 543 kW·m-3 and 834 kW.m-3, respectively which can be compa rable with those of nanocrystalline Fe73.5Cu1Nb3Si13.5B9 alloy. The analyses of core losses have been carried out in the wider range of f=20～104 kHz and Bm=0.0025～0.8 T and the approxi mate expression P(kW·m-3)=1.803 B:f1.77 has been obtained. The analyses of core losses in the range of f=20～104 kHz and Bmf=(10～40)×103(T.Hz) have shown that the core loss and the corresponding amplitude permeability roughly vary as P = 2.347×10-6(Bmf)1.97f-0.2231 and μa = 9.56× 105f-0.7464, respectively for the given product B.f. Some practical applica tions have also been mentioned.
The synthetical soft magnetic properties include dc and ac magnetic properties and pulse magnetic properties were reported for a newly-developed nanocrystalline Fe73.5Cu1 Nb1.5V1.5Si13.5B9 alloy The new alloy possesses high dc relative initial permeability of 12.5 × 104 and low coerciv † of 0.54 A / m Under the conditions of Bm = 0.3 T, f = 100 kHz and Bm = 0.2 T, f = 200 kHz the core losses of the new alloy are 543 kW · m-3 and 834 kW.m- 3, respectively which can be compa rable with those of nanocrystalline Fe73.5Cu1Nb3Si13.5B9 alloy. The analyzes of core losses have been carried out in a wider range of f = 20 ~ 104 kHz and Bm = 0.0025 ~ 0.8 T and the approxi mate The analysis of core losses in the range of f = 20~104 kHz and Bmf = (10~40) × 103 (T.Hz) have shown that the core loss and the corresponding amplitude of the acoustic stress vary vary as P = 2.347 × 10-6 (Bmf) 1.97f-0.2231 and μa = 9.56 × 105f-0.7464, respectively for the given product B.f. Some practical applicants have also been mentioned.