Crystallization of amorphous alloy of Fe-Cu-Nb-Si-B under the influence of high-power flashing optical radiation

TL;DR

This study investigates how high-power optical radiation influences the crystallization process in Fe-Cu-Nb-Si-B amorphous alloys, revealing conditions for nanocrystalline structure formation and elucidating the crystallization mechanism.

Contribution

It demonstrates the effect of incoherent optical radiation on alloy structure and identifies specific conditions for nanocrystalline formation, advancing understanding of radiation-induced crystallization.

Findings

Radiation alters alloy structure, either retaining amorphous state or forming crystalline phases.

Conditions for nanocrystalline structure formation are identified.

Crystallization follows rapid nucleation with growth slowing, consistent with known kinetics.

Abstract

Investigation of crystallization in an 5BDSR amorphous alloy by system Fe-Cu-Nb-Si-B under the influence of an incoherent optical radiation generated by gas discharge flash-lamp using X-ray diffraction scattering. It is shown that depending on the magnitude of the input power to the flash-lamp of structure of the alloy varies widely after radiation: a change in the short-range order during retaining the amorphous structure or the formation of several crystalline phases with different quantitative content in the alloy. Conditions are found for the formation of the nanocrystalline structure. Analysis in terms of the Kolmogorov-Johnson-Mehl-Avrami kinetics showed that the mechanism of primary crystallization under flash irradiation is associated with a well-known for finemet-type alloys: rapid nucleation, followed by growth slowing of nanocrystalline phase alpha-Fe(Si) with the D03 structure.