Formation of pure -phase in Mn–Al–C by fast annealing using spark plasma sintering

F Maccari, A Aubert, S Ener, E Bruder, I Radulov… - Journal of Materials …, 2022 - Springer
Mn–Al–C is intended to be one of the “gap magnets” with magnetic performance in-between
ferrites and Nd-Fe-B. These magnets are based on the metastable ferromagnetic τ-phase …

Spark plasma sintering of Mn–Al–C hard magnets

A Pasko, M Lobue, E Fazakas, LK Varga… - Journal of Physics …, 2014 - iopscience.iop.org
Structural and magnetic characterization of isotropic Mn–Al–C bulk samples obtained by
spark plasma sintering (SPS) is reported. This technique, to the best of our knowledge, has …

[HTML][HTML] Anisotropy of the ferromagnetic L1 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering

M Tyrman, S Ahmim, A Pasko, V Etgens, F Mazaleyrat… - AIP Advances, 2018 - pubs.aip.org
The metastable τ-phase of MnAl equi-atomic compound belongs to a family of ferromagnetic
alloys with L1 0 crystal structure. Stabilization of the phase by adding 2 at.% using …

Microstructure and magnetic properties of Mn-Al-C permanent magnets produced by various techniques

VV Popov, F Maccari, IA Radulov… - Manufacturing …, 2021 - mfr.edp-open.org
Bulk Mn 52 Al 46 C 2 in τ-phase was prepared by vacuum induction melting and used as
precursor for the production bulk permanent magnets by suction casting and hot-extrusion …

Directly obtained τ-phase MnAl, a high performance magnetic material for permanent magnets

H Fang, S Kontos, J Ångström, J Cedervall… - Journal of Solid State …, 2016 - Elsevier
The metastable tetragonal τ-phase has been directly obtained from casting Mn 0.54 Al 0.46
and (Mn 0.55 Al 0.45) 100 C 2 using the drop synthesis method. The as-casted samples …

Phase transitions in mechanically milled Mn-Al-C permanent magnets

MJ Lucis, TE Prost, X Jiang, M Wang, JE Shield - Metals, 2014 - mdpi.com
Mn-Al powders were prepared by rapid solidification followed by high-energy mechanical
milling. The rapid solidification resulted in single-phase ε. The milling was performed in both …

In situ Observation of Phase Transformation in MnAl(C) Magnetic Materials

PZ Si, HD Qian, CJ Choi, J Park, S Han, HL Ge… - Materials, 2017 - mdpi.com
The phase transformation in two modes, including both displacive and massive growth of τ-
phase from ε-MnAl (C), was observed by in situ transmission electron microscopy. The exact …

Hard magnetic properties of melt-spun Mn-Al-C alloys

A Pasko, F Mazaleyrat, M Lobue… - EPJ Web of …, 2013 - epj-conferences.org
Structural and magnetic characterization of Mn x− y Al 100− x− y C 2y (x={50, 55}; y={0, 1})
meltspun ribbons is reported. To obtain the metastable ferromagnetic τphase, rapidly …

Fabrication of bulk τ MnAl–C magnets by hot-pressing from ε-phase gas-atomized and milled powder

C Muñoz-Rodríguez, L Feng, EM Palmero, T Mix… - Journal of Alloys and …, 2020 - Elsevier
Isotropic nanocrystalline MnAlC particles with quasi-spherical shape were synthesized by
gas-atomization being afterwards milled for a short time of 60 s. Gas-atomized and milled …

Effect of carbon addition on magnetic order in Mn–Al–C alloys

M Tyrman, A Pasko, L Perriere, V Etgens… - IEEE Transactions …, 2017 - ieeexplore.ieee.org
The near-equiatomic Mn-Al alloys are considered for possible applications as rare-earth-
free permanent magnets due to the existence of a ferromagnetic τ-phase with L1 0 crystal …