J Mater Sci Technol ›› 1998, Vol. 14 ›› Issue (6): 538-542.

• Articles • Previous Articles     Next Articles

Magnetic Properties and Applications of Newly-developed Fe_(73.5)Cu_1Nb_(1.5)V_(1.5)Si_(13.5)B_9 Alloy

Yanzhong ZHANG (Major R&D Lab. for Functional Metal Materials, Shanghai Iron and Steel Research Institute, Shanghai 2O0940, China)   

  • Received:1998-11-28 Revised:1998-11-28 Online:1998-11-28 Published:2009-10-10

Abstract: 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.