In situ XRD Study of Rapid Crystallization of Metallic Glasses Using Novel Experimental Setup for Flash-Annealing
J. Bednarčíka, K. Kosibab, S. Paulyb, c, A. Rothkirchd
aP.J. Šafárik University, Institute of Physics, Park Angelinum 9, 04154 Košice, Slovakia
bInstitute for Complex Materials, IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
cUniversity of Applied Sciences, Würzburger Straß e 45, 63743 Aschaffenburg, Germany
dDeutches Elektronen-Synchrotron DESY, FS-EC, Notkestr. 85, 22603 Hamburg, Germany
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Fe-based metallic glasses (MGs) are known to exhibit excellent soft magnetic properties. A very effective way to further improve their magnetic properties is to incorporate nanocrystals into the glassy matrix. Usually it is done by conventional annealing in the vicinity of primary crystallization temperature. Direct current fast Joule heating (flash-annealing) represents an alternative way to introduce fine and randomly dispersed nanocrystals within MGs. Achieving high heating/cooling rates (well above 1000°/s) by flash-annealing opens up new possibilities for study the fast kinetics. Phase composition and microstructure of a material can be tailored by proper heat-treatment in order to improve its overall performance. In this paper, we introduce a novel setup for studying rapid crystallization of metallic glasses using an in situ X-ray diffraction flash-annealing.

topics: metallic glass, flash-annealing, crystallization, X-ray diffraction