Abstract
Abstract Hot deformation (HD) technology via spark plasma sintering effectively realized the magnetic hardening in L10-Mn1.8Ga alloy. During the HD process, recrystallization and grain size refinements were observed without changing the crystal structure, which led to the magnetic hardening and improvement of the magnetic properties. By optimizing the HD parameters, maximum height reduction of up to 92% can be achieved where full recrystallization with few defects were observed from EBSD and TEM measurements. The highest remanence of 2.92 kG and a coercivity of 4.73 kOe were achieved for the deformed L10-Mn1.8Ga magnet sintered at 873 K with a height reduction of 92% and a homogeneous average grain size of about 1.4 µm.
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