Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating
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JMEPEG https://doi.org/10.1007/s11665-020-05109-w
Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating Olaf Czyz_ , Jan Kusin´ski, Agnieszka Radziszewska, Zhongquan Liao, Ehrenfried Zschech, Małgorzata Ka˛c, and Roman Ostrowski (Submitted August 29, 2019; in revised form August 25, 2020) The paper is devoted to the study of microstructural and magnetic properties of the Fe-based amorphous ribbons after interference pulsed laser heating. The ternary amorphous alloy FeSiB, as well as the multicomponent alloys FeCuSiB and FeCuNbSiB, was subjected to laser pulses to induce crystallization in many microislands simultaneously. Structure and properties changes occurred in laser-heated dots. Detailed TEM analysis from a single dot shows the presence of FeSi(a) nanocrystals in the amorphous matrix. The FeSiB alloy is characterized after conventional crystallization by a dendritic structure; however, the alloys with copper as well copper and niobium additions are characterized by the formation of equiaxed crystals in the amorphous matrix. Amorphous alloys before and after the laser heating are soft magnetic; however, conventional crystallization leads to a deterioration of the soft magnetic properties of the material. Keywords
FeSiB, HRTEM, magnetic properties, microstructure
1. Introduction Fe-based amorphous alloys have been extensively studied due to their very soft magnetic properties such as high saturation magnetization and near-zero coercivity (Ref 1-3). Due to their soft magnetic properties, these materials are used in production of magnetic cores, wires and shields. Since the amorphous structure of metallic glasses is metastable, crystallization processes of these alloys have been reported in many papers. It has been proved that the soft magnetic properties and the saturation magnetization of Fe-based amorphous materials can be improved by nanocrystallization of these materials (Ref 4, 5). The best magnetic properties have been shown for alloys
This article is an invited submission to JMEP selected from presentations at The XXII Physical Metallurgy and Materials Science Conference: Advanced Materials and Technologies (AMT 2019) held June 9-12, 2019, in Bukowina Tatrzan´ska, Poland, and has been expanded from the original presentation. Olaf Czy_z, Jan Kusin´ski, and Agnieszka Radziszewska, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krako´w, Poland; Zhongquan Liao and Ehrenfried Zschech, Microelectronic Materials and Nanoanalysis, Fraunhofer Institute for Ceramic Technologies and Systems, Maria-Reiche-Str. 2, 01109 Dresden, Germany; Małgorzata Ka˛c, Institute of Nuclear Physics, 152 Radzikowskiego Str., 31342 Krako´w, Poland; and Roman Ostrowski, Institute of Optoelectronics, Military University of Technology, 2 Gen. S. Kaliskiego Str., 00-908 Warsaw, Poland. Contact e-mails: [email protected], [email protected], Agnieszka.Radziszewska@ agh.edu.pl, [email protected]
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