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Funct. Mater. 2019; 26 (2): 233-237.

doi:https://doi.org/10.15407/fm26.02.233

Effect of hydrostatic extrusion on structural and magnetic properties of polycrystalline Dy

N.A.Chernyak, V.I.Sokolenko, A.V.Mats

NSC Kharkiv Institute of Physics & Technology, 1 Akademicheskaya St., 61108 Kharkiv, Ukraine

Abstract: 

Electron microscopy and X-ray diffraction methods have been used to investigate special features of polycrystalline Dy transformation (under severe plastic deformation at hydrostatic extrusion conditions) into a submicrocrystalline aggregate with a strongly pronounced texture. The deformation texture emergence correlates with the process of subdivision microcrystallites, reducing the size of coherent scattering regions. The field dependence of magnetization, a saturation magnetization value of completely grain-oriented Dy extrudates coincide with those for a Dy single crystal with imposition of the field along the direction one of b < 10\overline{1}0 > axis. The extruded Dy may be successfully used for fabricating bulk magnetic field concentrators.

Keywords: 
Dy extrudates, severe plastic deformation, submicrocrystalline structure, favorable texture, high magnetic properties.
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