Enhanced magnetization and energy product in isotropic nanocrystalline Mn55Al45 alloys with boron doping. (October 2018)

• Record Type: Journal Article
• Authors: Xiang, Zhen; Xu, Chenfeng; Wang, Taolei; Song, Yiming; Yang, Huawei; Lu, Wei
• Is Part Of: Intermetallics. Volume 101(2018:Oct.)
• Page Start: 13
• Page End: 17
• Publication Date: 2018-10
• Subjects: MnAl alloy -- Rare-earth-free permanent magnets -- Boron doping -- Magnetic properties; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2018.07.003
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: A high magnetization and large energy product ( BH )max in the isotropic nanocrystalline τ phase Mn54.45 Al44.55 B1 alloy were reported. The formation activation energy and the temperature of the τ phase transformation in the MnAl-based alloys were reduced with the addition of boron element. In addition, a high magnetization of ∼127 emu/g was achieved. The addition of boron element can obviously enhance the coercivity of the MnAl-based alloys. Moreover, a high ( BH )max of ∼5.5 MGOe was reached in the Mn54.45 Al44.55 B1 alloy. Therefore, this work can open a direction to realize the high performance in the MnAl-based rare-earth-free permanent magnets. Highlights: A remarkable high M s of ∼127 emu/g was achieved. An enhanced coercivity (∼2490 Oe) and an energy product (5.5 MGOe) were achieved in the Mn54.45 Al44.55 B1 alloy.