Bulk Mn-Al-C permanent magnets prepared by various techniques
Date
2016-03-01
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
Abstract
Bulk Mn-Al-C magnets have been prepared by hot-compaction, microwave sintering
and hot-deformation. Powders of Mn53.5Al44.5C2 alloy in the ε-phase produced by
high energy ball milling have been used as precursor for the hot-compacted and
microwave sintered magnets. Hot-deformed magnets were produced from alloy
pieces in the τ-phase. The hot-compacted magnet exhibits magnetization, remanence
and coercivity of 50 emu/g, 28 emu/g and 3.3 kOe, respectively. Microwave sintered
magnet shows a maximum magnetization of 94 emu/g, remanence of 30 emu/g and
coercivity of 1.1 kOe. The best magnetic properties are obtained in hot-deformed
magnets with magnetization, remanence, coercivity and energy product of 82 emu/g,
50 emu/g, 2.2 kOe and 1.8 MGOe, respectively. Hot-deformed magnets exhibit
texture with the highest degree of texture obtained 0.26. It is found that the pressure
applied during compaction/deformation favors coercivity.
Description
Publisher's PDF.
Keywords
Citation
Bulk Mn-Al-C permanent magnets prepared by various techniques Madugundo, Rajasekhar and Koylu-Alkan, Ozlem and Hadjipanayis, George C., AIP Advances, 6, 056009 (2016), DOI:http://dx.doi.org/10.1063/1.4943242