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Ferromagnetism of manganese-aluminium alloyed with 0–3% carbon from direct induction melting and subsequent annealing
Author(s)
Charoensuk, Thanida
Saetang, Panissa
Pinitsoontorn, Supree
Sirisathitkul, Chitnarong
Date Issued
January 1, 2020
Type
Article
Abstract
The transformation from ε to τ phase is investigated in manganese-aluminium (Mn55Al45) alloyed by the induction melting. By annealing Mn55Al45 at 450–550°C for 2 h, the ferromagnetic τ-MnAl is enhanced at the expense of ε phase. The largest coercivity of 1139 Oe and remanent magnetization of 3.71 emu/g are obtained after annealing at 550°C. The additions of 1 and 2% carbon affect the phase and magnetic properties of Mn55Al45 but the 2 h annealing at 550°C still leads to the largest coercivity. Interestingly, substantial coercivity and magnetizations are directly obtained in (Mn55Al45)98C2 and (Mn55Al45)97C3 by the induction melting without further heat treatments.
Citation
Romanian Reports in Physics, 72(3), 1-11, 2020