Investigation on magnetic properties of mechanically alloyed τ-MnAlC with Fe addition

被引：2
作者：
Van Tang Nguyen [1 ,2 ]
Mazaleyrat, Frederic [3 ]
Calvayrac, Florent [4 ]
Quang Minh Ngo [1 ,2 ,5 ]
Randrianantoandro, Nirina [4 ]
机构：
[1] Univ Sci & Technol Hanoi, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
[2] Grad Univ Sci & Technol, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam
[3] Univ Paris Saclay, ENS Paris Saclay, CNRS, SATIE, 4 Ave Sci, F-91190 Gif Sur Yvette, France
[4] Le Mans Univ, Inst Mol & Mate Riaux Mans, UMR CNRS 6283, Ave Olivier Messiaen, F-72085 Le Mans 9, France
[5] Vietnam Acad Sci & Technol, Inst Mat Sci, 18 Hoang Quoc Viet, Hanoi, Vietnam
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2022年 / 546卷
关键词：
Mechanical alloying; Thermal Stability; Magnetic properties; MnFeAlC alloy; PERMANENT-MAGNETS; PHASE; MN;
D O I：
10.1016/j.jmmm.2021.168892
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Fe addition on thermal stability, crystallography, and magnetic properties of tau-Mn51Al47C2 was investigated. Alloys with composition Mn51-xFexAl47C2 (x = 0, 0.5, 1, 2, and 4) were synthesized by mechanical alloying method. High purity of tau-Mn(Fe)AlC up to 98% could be obtained after 10 h of milling, then annealed at 1050 degrees C for 1 h, and followed by an aging process at appropriate temperatures from 515 to 540 degrees C for 50 min. It was found that the thermal stability of both epsilon and tau phases was enhanced by the addition of Fe up to 4 at.% into MnAlC alloy through a shifting of epsilon-to-tau transformation temperature to high temperature region and a reduction in c/a ratio of Fe doped tau-MnAlC compared to iron free r-MnAlC. While the magnetization and Curie temperature of Fe doped tau-MnAlC showed a reduction compared to iron free tau-Mn51Al47C2, coercivity seems not to be significantly affected. Ab initio calculation showed a lower magnetic moment of Fe (mu(Fe) = 1.77 mu(B)) compared to Mn (mu(Mn)(_average) = 2.36 mu(B)) in tau-Mn(Fe)AlC when Fe substituted Mn position at la site.
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页数：8
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