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7017288 
Journal Article 
FERROMAGNETISM OF MANGANESE-ALUMINIUM ALLOYED WITH 0-3% CARBON FROM DIRECT INDUCTION MELTING AND SUBSEQUENT ANNEALING 
Charoensuk, T; Saetang, P; Ruttanapun, C; Phrompet, C; Pinitsoontorn, S; Sirisathitkul, C; , 
2020 
0 
Romanian Reports in Physics
ISSN: 1221-1451 
EDITURA ACAD ROMANE 
BUCURESTI 
72 
3 
WOS:000562620700014 
The transformation from epsilon to tau phase is investigated in manganese-aluminium (Mn55Al45) alloyed by the induction melting. By annealing Mn55Al45 at 450-550 degrees C for 2 h, the ferromagnetic tau-MnAl is enhanced at the expense of epsilon phase. The largest coercivity of 1139 Oe and remanent magnetization of 3.71 emu/g are obtained after annealing at 550 degrees C. The additions of 1 and 2% carbon affect the phase and magnetic properties of Mn55Al45 but the 2 h annealing at 550 degrees C still leads to the largest coercivity. Interestingly, substantial coercivity and magnetizations are directly obtained in (Mn55Al45)(98)C-2 and (Mn55Al45)(97)C-3 by the induction melting without further heat treatments. 
rare-earth-free magnets; manganese; aluminium; induction melting; annealing