Magneto-Optical Control of Ordering Kinetics and Vacancy Behavior in Fe–Al Thin Films Quenched by Laser

IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Engineering Materials Pub Date : 2024-11-14 DOI:10.1002/adem.202401044
Igor Y. Pashenkin, Dmitry A. Tatarskiy, Sergey A. Churin, Andrey N. Nechay, Mikhail N. Drozdov, Maksim V. Sapozhnikov, Nikolay I. Polushkin
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Abstract

One of the issues arising in materials science is the behavior of nonequilibrium point defects in the atomic lattice, which defines the rates of chemical reactions and relaxation processes as well as affects the physical properties of solids. It is previously theoretically predicted that melting and rapid solidification of metals and alloys provide a vacancy concentration in the quenched material, which can be comparable to that quantity at the point of melting. Here, the vacancy behavior is studied experimentally in thin films of the near equiatomic Fe–Al alloy subjected to nanosecond laser annealing with intensities up to film ablation. The effects of laser irradiation are studied by monitoring magneto-optically the ordering kinetics in the alloy at the very ablation edge, within a narrow (micron-scale) ring-shaped region around the ablation zone. Quantitatively, the vacancy supersaturation in the quenched alloy has been estimated by fitting a simulated temporal evolution of the long-range chemical order to the obtained experimental data. Laser quenching (LQ) of alloys and single-element materials will be a tool for obtaining novel phase states within a small volume of the crystal.

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来源期刊
Advanced Engineering Materials
Advanced Engineering Materials 工程技术-材料科学:综合
CiteScore
5.70
自引率
5.60%
发文量
544
审稿时长
1.7 months
期刊介绍: Advanced Engineering Materials is the membership journal of three leading European Materials Societies - German Materials Society/DGM, - French Materials Society/SF2M, - Swiss Materials Federation/SVMT.
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