Электронный каталог

Статья

Samadov, S.F.
Structural Relaxation and Defect Dynamics in Fe&sub(92)Si&sub(6)C&sub(2) Amorphous Alloys Under Controlled Annealing / S.F.Samadov, A.S.Abiyev, A.A.Sidorin, N.V.M.Trung, T.N.Vershinina, O.S.Orlov, [a.o.]. – Text : electronic // Journal of Materials Science. – 2026. – Vol. 61, No. 7. – P. 4668-4682. – URL: https://doi.org/10.1007/s10853-025-12132-6. – Bibliogr.: 85.

This study investigates the defect evolution, structural relaxation, and crystallization behavior of Fe&sub(92)Si&sub(6)C&sub(2) amorphous alloys subjected to controlled thermal annealing between 373 and 973 K. A multi-technique approach—Doppler broadening spectroscopy (DBS), positron annihilation lifetime spectroscopy (PALS), X-ray diffraction (XRD), and Raman spectroscopy—was employed to analyze the temperature-dependent transformations in free volume, vacancy clusters, and carbon bonding structure. DBS measurements revealed a systematic reduction in free-volume-type defects up to 573 K, followed by nanocrystalline α-Fe(Si) nucleation at higher temperatures. PALS analysis showed a decrease in τ&sub(1) and τ&sub(2) lifetimes and a significant increase in I&sub(2), confirming the growth of vacancy clusters and defect migration toward grain boundaries during crystallization. XRD confirmed the transition from an amorphous halo to well-defined crystalline peaks, accompanied by a substantial reduction in microstrain from 604 × 10&sup(−4) to 17 × 10&sup(−4) with annealing. Raman spectroscopy indicated enhanced graphitization and the emergence of a D&sub(2) band above 773 K, evidencing structural reorganization of carbon. Overall, the findings provide a comprehensive understanding of defect dynamics and structural evolution in Fe&sub(92)Si&sub(6)C&sub(2) amorphous alloys, highlighting the effectiveness of thermal treatment in improving their structural integrity and potential for advanced magnetic and technological applications.



ОИЯИ = ОИЯИ (JINR)2026