Effect of Longitudinal Magnetic Field Annealing Process on the Properties And Structures Of Soft Magnetic Fe 73.7Si 15.3Cu 1Nb 3B 7 Nanocrystalline Alloys
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Titel:
Effect of Longitudinal Magnetic Field Annealing Process on the Properties And Structures Of Soft Magnetic Fe 73.7Si 15.3Cu 1Nb 3B 7 Nanocrystalline Alloys
Beschreibung:
Fe73.7Si15.3Cu1Nb3B7 nanocrystalline alloy was subjected to longitudinal magnetic field(LMF) annealing treatment, and the influence of different magnetic field strengths(MFS) on the magnetic properties and microstructure of the nanocrystalline soft magnetic alloy were investigated. The results showed that the Hc and Ps of nanocrystalline magnetic rings tended to increase and then decrease with aggrandizing MFS, on top of that reached the minimum value at the MFS of 0.588 mT, which were 0.51 A/m and 89.86 W/kg(test conditions: Bm = 0.4 T,f = 50 kHz), respectively.The μe is the highest value in the same test frequency range of 10-1000 kHz. Besides the rectangular ratios of the magnetic rings were all above 0.95 when the applied MFS was higher than 0.235 mT.The formation of lamellar domains inside the alloy after LMF annealing was observed by the magneto-optical Kerr effect, with the MFS increasing, the direction of the domains gradually parallel to the strip direction and the width of the domain walls increasing all the time.The best soft magnetic performance of the strip was achieved when the angle between the magnetic domains and the easy magnetization direction was 21.9°