1. IMPACT OF ANNEALING TIME ON THE FORMATION OF NANOCRYSTAL IN AMORPHOUS FE75.5SI13.5CU1NB1B9 ALLOY AND THEIR ULTRA-SOFT MAGNETIC PROPERTIES.
- Author
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SAHA, SAMIR KUMAR, MARIA, KAZI HANIUM, HOSSAIN, ENAYET, BHUIYAN, MAHABUB ALAM, SAHA, D. K., and CHOUDHURY, SHAMIMA
- Subjects
ANNEALING of crystals ,AMORPHOUS alloys ,MAGNETIC properties ,GRAIN size ,MAGNETIZATION - Abstract
To observe the impact of the annealing time on the alloy structure and ultra-soft magnetic properties of Fe
75.5 Si13.5 Cu1 Nb1 B9 , the alloy was annealed in a controlled way in the temperature range 475 - 600°C for different annealing time from 5 to 30 min. Amorphosity of the ribbon and nanocrystalline state was evaluated by X-ray diffraction. Grain size and Si content increase with increasing annealing temperature and time; on the other hand lattice parameter decrease with increasing annealing temperature and time. The maximum permeability was observed at annealing temperature Ta = 525°C for 15 min, and thereafter it starts to decreases. Saturation magnetization increases with annealing temperature Ta for the samples and finally decreases during annealing at a temperature much higher than peak crystallization temperature. The results of the experimental observations are explained on the basis of existing theories of nanocrystalline amorphous metallic ribbons. [ABSTRACT FROM AUTHOR]- Published
- 2016
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