Advanced thermal stability investigations of the Mn–Al-Ga system
A ternary Mn–Al-Ga alloy with the nominal composition Mn55Al38.57Ga6.43 was produced by arc melting. After homogenisation, the alloy consisted of the ε and γ2 phases. Appropriate heat treatments were used to transform each of these into a phase with the L10 structure. These two L10 phases had differ...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-03-01
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| Series: | Results in Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X20300108 |
| _version_ | 1818241701180866560 |
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| author | T. Mix T.G. Woodcock |
| author_facet | T. Mix T.G. Woodcock |
| author_sort | T. Mix |
| collection | DOAJ |
| description | A ternary Mn–Al-Ga alloy with the nominal composition Mn55Al38.57Ga6.43 was produced by arc melting. After homogenisation, the alloy consisted of the ε and γ2 phases. Appropriate heat treatments were used to transform each of these into a phase with the L10 structure. These two L10 phases had different compositions, lattice parameters and magnetic properties. In order to test the stability of the L10 phases against decomposition, heat treatments were carried out at 700 °C for durations of up to 14 days. The results showed that the decomposition started with formation of the β-Mn phase and subsequent appearance of the γ2 phase. The resulting diffusion gradients resulted in composition changes in the L10 phases and after 7 days, only a single, intermediate composition remained. After 14 days, the decomposition was almost complete. The decomposition of the L10 phases in the ternary Mn–Al-Ga alloy was significantly slower than in binary Mn–Al alloys. |
| first_indexed | 2024-12-12T13:33:31Z |
| format | Article |
| id | doaj.art-b4c2be72eefd427d939c98d89f106f2c |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-12-12T13:33:31Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
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| series | Results in Materials |
| spelling | doaj.art-b4c2be72eefd427d939c98d89f106f2c2022-12-22T00:23:01ZengElsevierResults in Materials2590-048X2020-03-015100068Advanced thermal stability investigations of the Mn–Al-Ga systemT. Mix0T.G. Woodcock1Corresponding author.; Leibniz IFW Dresden, Institute for Metallic Materials, Helmholtzstraße 20, 01069, Dresden, GermanyLeibniz IFW Dresden, Institute for Metallic Materials, Helmholtzstraße 20, 01069, Dresden, GermanyA ternary Mn–Al-Ga alloy with the nominal composition Mn55Al38.57Ga6.43 was produced by arc melting. After homogenisation, the alloy consisted of the ε and γ2 phases. Appropriate heat treatments were used to transform each of these into a phase with the L10 structure. These two L10 phases had different compositions, lattice parameters and magnetic properties. In order to test the stability of the L10 phases against decomposition, heat treatments were carried out at 700 °C for durations of up to 14 days. The results showed that the decomposition started with formation of the β-Mn phase and subsequent appearance of the γ2 phase. The resulting diffusion gradients resulted in composition changes in the L10 phases and after 7 days, only a single, intermediate composition remained. After 14 days, the decomposition was almost complete. The decomposition of the L10 phases in the ternary Mn–Al-Ga alloy was significantly slower than in binary Mn–Al alloys.http://www.sciencedirect.com/science/article/pii/S2590048X20300108Rare earth free permanent magnetL10Mn–AlMn–GaMn–Al-GaThermal stability |
| spellingShingle | T. Mix T.G. Woodcock Advanced thermal stability investigations of the Mn–Al-Ga system Results in Materials Rare earth free permanent magnet L10 Mn–Al Mn–Ga Mn–Al-Ga Thermal stability |
| title | Advanced thermal stability investigations of the Mn–Al-Ga system |
| title_full | Advanced thermal stability investigations of the Mn–Al-Ga system |
| title_fullStr | Advanced thermal stability investigations of the Mn–Al-Ga system |
| title_full_unstemmed | Advanced thermal stability investigations of the Mn–Al-Ga system |
| title_short | Advanced thermal stability investigations of the Mn–Al-Ga system |
| title_sort | advanced thermal stability investigations of the mn al ga system |
| topic | Rare earth free permanent magnet L10 Mn–Al Mn–Ga Mn–Al-Ga Thermal stability |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X20300108 |
| work_keys_str_mv | AT tmix advancedthermalstabilityinvestigationsofthemnalgasystem AT tgwoodcock advancedthermalstabilityinvestigationsofthemnalgasystem |