Investigation on magnetic properties of mechanically alloyed τ-MnAlC with Fe addition
•High purity of τ-Mn51-xFexAl47C2 (x = 0, 0.5, 1, 2, and 4) up to 98% was obtained.•Thermal stability of both ε and τ phases was enhanced by the addition of Fe.•Ms and TC of Fe doped τ-MnAlC showed a reduction compared to iron free τ-MnAlC.•Calculation showed a smaller magnetic moment of Fe compared...
Gespeichert in:
Veröffentlicht in: | Journal of magnetism and magnetic materials 2022-03, Vol.546, p.168892, Article 168892 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | •High purity of τ-Mn51-xFexAl47C2 (x = 0, 0.5, 1, 2, and 4) up to 98% was obtained.•Thermal stability of both ε and τ phases was enhanced by the addition of Fe.•Ms and TC of Fe doped τ-MnAlC showed a reduction compared to iron free τ-MnAlC.•Calculation showed a smaller magnetic moment of Fe compared to Mn in τ-Mn(Fe)AlC.
The influence of Fe addition on thermal stability, crystallography, and magnetic properties of τ-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 τ-Mn(Fe)AlC up to 98% could be obtained after 10 h of milling, then annealed at 1050 °C for 1 h, and followed by an aging process at appropriate temperatures from 515 to 540 °C for 50 min. It was found that the thermal stability of both ε and τ phases was enhanced by the addition of Fe up to 4 at.% into MnAlC alloy through a shifting of ε-to-τ transformation temperature to high temperature region and a reduction in c/a ratio of Fe doped τ-MnAlC compared to iron free τ-MnAlC. While the magnetization and Curie temperature of Fe doped τ-MnAlC showed a reduction compared to iron free τ-Mn51Al47C2, coercivity seems not to be significantly affected. Ab initio calculation showed a lower magnetic moment of Fe (μFe = 1.77 μB) compared to Mn (μMn_average = 2.36 μB) in τ-Mn(Fe)AlC when Fe substituted Mn position at 1a site. |
---|---|
ISSN: | 0304-8853 1873-4766 |
DOI: | 10.1016/j.jmmm.2021.168892 |