| Amorphous ribbons of composition Fe_(73.5)Si_(13.5)B_9Cu₁Nb₃have been annealed above their crystallization temperature. When α-Fe is fully crystallized, a nanocrystalline material which has superior soft magnetic properties is obtained. To explain the variation of the magnetic properties of Fe_(73.5)Si_(13.5)B_9Cu₁Nb₃alloy during crystallization, a new method using DSC residual peak was contrived in this paper. Using this method, a relation between magnetic permeability(μ), coercivity(H_c), flux density(B) and the crystallized volume fraction of α-Fe was investigated. Also, the microstructural change of Fe_(73.5)Si_(13.5)B_9Cu₁Nb₃alloy with the variation of the crystallized volume fraction of α-Fe was investigated using Transmission Electron Microscopy(T.E.M.). |
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