14 December 2016 Direct laser welding of Sm and Fe powders for creation of magnetic alloys on the stainless steel substrate: microstructure and magnetic properties
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Proceedings Volume 10176, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics; 1017620 (2016) https://doi.org/10.1117/12.2268255
Event: Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics, 2016, Khabarovsk, Russia
Abstract
The testing of welding of Sm and then Fe powders was carried out on laser complex to create ferromagnetic coatings of (1-2) μm thickness in conditions of argon flow. X-ray diffraction analysis showed that oxidation of Sm and Fe occurs, but the main contribution of Fe grains in the structure was proved. It was established that in the conditions of the additional magnetic field (0.2 T) the crystallization of single Fe grains (5-20 μm) with formation of a mesh structure in Sm oxide matrix occurs on the whole thickness of the welded layer. The dissolution of Sm on the depth of 1.0-1.3 μm was observed inside the substrate with the formation of high density Sm oxide’s grains (2-10 μm), when the additional magnetic field is absent during laser welding. The Fe laser welding results in the formation of elongated Fe grains to a depth of 60-100 μm framed. Regardless of the microstructure samples showed similar magnetic loops with high saturation magnetization (110-112 emu/g), low coercivity (0-100 Oe) and near zero residual magnetization that corresponds to soft magnetic coatings with main contribution of Fe grains. Magnetic ordering was found in both coatings with Curie temperature of 50 K.
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Nikolay G. Galkin, Nikolay G. Galkin, Yuri N. Kulchin, Yuri N. Kulchin, Evgeniy P. Subbotin, Evgeniy P. Subbotin, Aleksander I. Nikitin, Aleksander I. Nikitin, Dmitriy S. Yatsko, Dmitriy S. Yatsko, Artem A. Kostyanko, Artem A. Kostyanko, D. C. Pivovarov, D. C. Pivovarov, } "Direct laser welding of Sm and Fe powders for creation of magnetic alloys on the stainless steel substrate: microstructure and magnetic properties", Proc. SPIE 10176, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics, 1017620 (14 December 2016); doi: 10.1117/12.2268255; https://doi.org/10.1117/12.2268255
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