Phase transformation studies on Mn−Al−C alloy,by DSC and electrical resistivity measurements |
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Authors: | V. Rao A. Mitra |
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Affiliation: | 1. Magnetic Materials Group, National Metallurgical Laboratory, 831007, Jamshedpur, India
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Abstract: | Phase transformation studies carried out on Mn?Al?C permanent magnet alloy employing DSC and electrical resistivity measurements, are reported and discussed. The transformation of the hexagonal Mn?Al phase (disordered and non-magnetic) to the ferromagnetic fct phase proceeds via the formation, in at least two stages, of the ordered orthorhombic phase. The activation energy for the formation of the fct phase is ≈34.65 kcal/mol. Microstructural changes occurring at various stages of the transformation are also studied. |
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