On some aspects of nano-crystallization of soft magnetic amorphous alloys: new nanocrystalline alloys for electronic applications
Abstract
Transition from the amorphous state takes place typically in a two-stage transformation process. The first stage represents formation of (nano)crystalline grains from the amorphous matrix. The grains are as a rule spherical or regular in shape and their morphology as well as size and spatial distribution is well in agreement with the notion of intense, probably homogeneous nucleation and three-dimensional growth with low level of mutual impingement among them. Further specific features are related from case to case with the nominal composition and the local ordering in the amorphous state. The investigation of the complete process of transition from amorphous through nanocrystalline into a final stable polycrystalline state is presented, for the case of a wide compositional range of (Fe-Co)-Nb-(Si-B) rapidly quenched ribbons with different Co, Nb and Si concentrations. Focus is given on the the stability of the amorphous state, structure of phases formed during crystallization and the ...
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