Detailed Investigation on Possible Phases During Solid-State Synthesis of MnAl Intermetallic Compound

Tavoosi, Majid

doi:10.22068/ijmse.3550

Volume 21, Issue 3 (September 2024) IJMSE 2024, 21(3): 1-8 | Back to browse issues page

‎ 10.22068/ijmse.3550

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Tavoosi M. Detailed Investigation on Possible Phases During Solid-State Synthesis of MnAl Intermetallic Compound. IJMSE 2024; 21 (3) :1-8
URL: http://ijmse.iust.ac.ir/article-1-3550-en.html

Detailed Investigation on Possible Phases During Solid-State Synthesis of MnAl Intermetallic Compound

Majid Tavoosi

Abstract: (704 Views)

The present study focuses on the phase and structural features of MnAl intermetallic compound during solid-state synthesis. In this regard, the milling process was done in differentMn_50+xAl_50-x (0<x<7.5)powder mixtures and the prepared samples were evaluated using X-ray diffractometer, scanning and transmission electron microscopy, differential thermal analysis and vibrating sample magnetometer. The results showed that the τ-MnAl magnetic phase with L1₀ structure could not be formed during the milling and low temperature annealing. During milling process, Al atoms dissolve in Mn network and a single β-Mn supersaturated solid solution (SSSS) form. The β-Mn (SSSS) phase is unstable and transforms into the icosahedral quasi-crystal as well as γ_2-Al₈Mn₅ and β-Mn stable phases during subsequent annealing.

Keywords: MnAl permanent magnet, Mechanical alloying, Icosahedral phase.