Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering
The metastable τ-phase of MnAl equi-atomic compound belongs to a family of ferromagnetic alloys with L10 crystal structure. Stabilization of the phase by adding 2 at. % using manganese carbide (Mn23C6) enhances the magnetization in relation with the increase in lattice volume. It is thus a promising...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
AIP Publishing LLC
2018-05-01
|
Series: | AIP Advances |
Online Access: | http://dx.doi.org/10.1063/1.5007241 |
id |
doaj-3c1c9cd01aac47b4bdf953c98756e2bd |
---|---|
record_format |
Article |
spelling |
doaj-3c1c9cd01aac47b4bdf953c98756e2bd2020-11-24T22:09:46ZengAIP Publishing LLCAIP Advances2158-32262018-05-0185056217056217-610.1063/1.5007241153892ADVAnisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sinteringMuriel Tyrman0Smail Ahmim1Alexandre Pasko2Victor Etgens3Frédéric Mazaleyrat4Simon Quetel-Weben5Loïc Perrière6Ivan Guillot7SATIE, ENS Paris-Saclay, CNRS, 61 av President Wilson, 94230 Cachan, FranceSATIE, ENS Paris-Saclay, CNRS, 61 av President Wilson, 94230 Cachan, FranceSATIE, ENS Paris-Saclay, CNRS, 61 av President Wilson, 94230 Cachan, FranceSATIE, ENS Paris-Saclay, CNRS, 61 av President Wilson, 94230 Cachan, FranceSATIE, ENS Paris-Saclay, CNRS, 61 av President Wilson, 94230 Cachan, FranceICMPE, CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, FranceICMPE, CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, FranceICMPE, CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, FranceThe metastable τ-phase of MnAl equi-atomic compound belongs to a family of ferromagnetic alloys with L10 crystal structure. Stabilization of the phase by adding 2 at. % using manganese carbide (Mn23C6) enhances the magnetization in relation with the increase in lattice volume. It is thus a promising candidate for rare-earth-free permanent magnets. Coercivity of Mn-Al-C alloys being still weak, there is an interest to see to which extend sintering/transformation of the ϵ-phase by Spark Plasma Sintering (SPS) can increase the coercivity and the anisotropy. The structural and the magnetic properties were studied for samples sintered at 550 °C under uniaxial pressure of 100, 200, 300 and 400 MPa. Coercivity, remanence and anistotropy appears with the sintering pressure. The high pressure applied while sintering produces preferential orientation of the flake-shaped grains which influences the remanence.http://dx.doi.org/10.1063/1.5007241 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Muriel Tyrman Smail Ahmim Alexandre Pasko Victor Etgens Frédéric Mazaleyrat Simon Quetel-Weben Loïc Perrière Ivan Guillot |
spellingShingle |
Muriel Tyrman Smail Ahmim Alexandre Pasko Victor Etgens Frédéric Mazaleyrat Simon Quetel-Weben Loïc Perrière Ivan Guillot Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering AIP Advances |
author_facet |
Muriel Tyrman Smail Ahmim Alexandre Pasko Victor Etgens Frédéric Mazaleyrat Simon Quetel-Weben Loïc Perrière Ivan Guillot |
author_sort |
Muriel Tyrman |
title |
Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering |
title_short |
Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering |
title_full |
Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering |
title_fullStr |
Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering |
title_full_unstemmed |
Anisotropy of the ferromagnetic L10 phase in the Mn-Al-C alloys induced by high-pressure spark plasma sintering |
title_sort |
anisotropy of the ferromagnetic l10 phase in the mn-al-c alloys induced by high-pressure spark plasma sintering |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2018-05-01 |
description |
The metastable τ-phase of MnAl equi-atomic compound belongs to a family of ferromagnetic alloys with L10 crystal structure. Stabilization of the phase by adding 2 at. % using manganese carbide (Mn23C6) enhances the magnetization in relation with the increase in lattice volume. It is thus a promising candidate for rare-earth-free permanent magnets. Coercivity of Mn-Al-C alloys being still weak, there is an interest to see to which extend sintering/transformation of the ϵ-phase by Spark Plasma Sintering (SPS) can increase the coercivity and the anisotropy. The structural and the magnetic properties were studied for samples sintered at 550 °C under uniaxial pressure of 100, 200, 300 and 400 MPa. Coercivity, remanence and anistotropy appears with the sintering pressure. The high pressure applied while sintering produces preferential orientation of the flake-shaped grains which influences the remanence. |
url |
http://dx.doi.org/10.1063/1.5007241 |
work_keys_str_mv |
AT murieltyrman anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT smailahmim anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT alexandrepasko anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT victoretgens anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT fredericmazaleyrat anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT simonquetelweben anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT loicperriere anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering AT ivanguillot anisotropyoftheferromagneticl10phaseinthemnalcalloysinducedbyhighpressuresparkplasmasintering |
_version_ |
1725810919584301056 |