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Project deliverable . 2024
License: CC BY NC
Data sources: Datacite
ZENODO
Project deliverable . 2024
License: CC BY NC
Data sources: Datacite
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PASSENGER D1.2 - Fabrication of high-coercive Mn-Al-C loose powder (obtained by milling and annealing the ε-phase powder) with target values: coercivity jHc> 3.5 kOe; threshold for remanence Br> 2.0 kG

Authors: Forlin, Enrico; Köll, Anna; Dopler, Martin; Miranda, Rodolfo;

PASSENGER D1.2 - Fabrication of high-coercive Mn-Al-C loose powder (obtained by milling and annealing the ε-phase powder) with target values: coercivity jHc> 3.5 kOe; threshold for remanence Br> 2.0 kG

Abstract

To ensure that the material has ferromagnetic properties, two different routes were taken to produce τ-MnAlC phase powder. METALPINE's task in this project is to atomise the MnAlC material to obtain powder with a crystallographic structure based on the ε-phase (precursor). Subsequent heat treatment and investigations by IMDEA revealed successful transformation to almost pure τ-MnAlC phase. LCM produced the MnAlC alloy by casting, which was subsequently crushed and thus processed into powder. After initial difficulties with comminution of cast ingots, IMDEA have developed a ball milling method based on IMDEA’s self-developed “flash-milling”, that makes it possible to produce powders with a size of less than 300μm. A subsequent heat treatment influences the magnetic properties of the material, so the aim is to find a compromise between milling time and annealing time to achieve the highest possible remanence and coercivity (considering that typically for permanent magnets the increase in one of these properties is accompanied by a decrease in the second one). MBN applied its HEBM technology to replicate the “flash-milling” effect at pilot scale, towards a process industrialization. the target value for this deliverable for the remanence was achieved when starting from τ-phase synthesis, while the value of the coercivity is approx. 3% lower than target. When starting from ε-phase synthesis, approx. 90% of target values have been achieved. The sample with the best magnetic properties so far was selected to aim for larger scale production and to further optimise the annealing process. MnAlC τ-phase powder material has been already obtained from scale-up activities and delivered for initial magnet manufacturing tests to WP2 partners.

This deliverable is currently under review by the European Commission.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average