Characterization in the Icosahedral Phase of Al63Cu25Fe12 System
The present work aimed to characterize the microstructure of the icosahedral phase (quasicrystalline phase-ϕ) of the system with stoichiometric composition of the quasicrystal Al63Cu25Fe12. The ternary alloy with nominal composition of Al63Cu25Fe12 was processed by mechanical alloying (MA) as a viab...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Mato Grosso do Sul
2019-07-01
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| Series: | Orbital: The Electronic Journal of Chemistry |
| Subjects: | |
| Online Access: | https://periodicos.ufms.br/index.php/orbital/article/view/15933 |
| _version_ | 1797946859900108800 |
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| author | Luciano Nascimento Anastasiia Melnyk |
| author_facet | Luciano Nascimento Anastasiia Melnyk |
| author_sort | Luciano Nascimento |
| collection | DOAJ |
| description | The present work aimed to characterize the microstructure of the icosahedral phase (quasicrystalline phase-ϕ) of the system with stoichiometric composition of the quasicrystal Al63Cu25Fe12. The ternary alloy with nominal composition of Al63Cu25Fe12 was processed by mechanical alloying (MA) as a viable solid state processing method for producing various metastable and stable quasicrystalline phases. The structural characterization of the obtained samples was performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), while the elemental composition was determined by dispersive energy spectroscopy (DES). The diffraction patterns of Al63Cu25Fe12 showed the presence of quasicrystalline phase-ϕ, ω-Al7Cu2Fe, β-Al(Fe, Cu) and λ-Al13Fe4 phases that coexist with the thermodynamic quasicrystalline phase-ϕ. In icosahedral phase oxidation of aluminum forms a dense layer on the passivating outer most surface of the quasicrystal which causes depletion in both copper and iron. It was observed not only the presence of alumina, γ-Al2O3, but also the formation of hematite and copper oxide in the dense layer. Finally, elemental analysis indicates that during alloy synthesis there is little variation of the ideal composition. The results indicate that alloys with high percentage of icosahedral phase can be obtained by casting in the air.
DOI: http://dx.doi.org/10.17807/orbital.v11i3.1381
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| first_indexed | 2024-04-10T21:17:43Z |
| format | Article |
| id | doaj.art-a70af03d7a854b6a92c4905a8cd86f89 |
| institution | Directory Open Access Journal |
| issn | 1984-6428 |
| language | English |
| last_indexed | 2024-04-10T21:17:43Z |
| publishDate | 2019-07-01 |
| publisher | Universidade Federal de Mato Grosso do Sul |
| record_format | Article |
| series | Orbital: The Electronic Journal of Chemistry |
| spelling | doaj.art-a70af03d7a854b6a92c4905a8cd86f892023-01-20T10:52:40ZengUniversidade Federal de Mato Grosso do SulOrbital: The Electronic Journal of Chemistry1984-64282019-07-01113Characterization in the Icosahedral Phase of Al63Cu25Fe12 SystemLuciano Nascimento0Anastasiia Melnyk1Department of Mathematics - DM/CCT-FP, Piancó, PB, BrazilDepartment of Education-DE – UVA, Caicó, RNThe present work aimed to characterize the microstructure of the icosahedral phase (quasicrystalline phase-ϕ) of the system with stoichiometric composition of the quasicrystal Al63Cu25Fe12. The ternary alloy with nominal composition of Al63Cu25Fe12 was processed by mechanical alloying (MA) as a viable solid state processing method for producing various metastable and stable quasicrystalline phases. The structural characterization of the obtained samples was performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), while the elemental composition was determined by dispersive energy spectroscopy (DES). The diffraction patterns of Al63Cu25Fe12 showed the presence of quasicrystalline phase-ϕ, ω-Al7Cu2Fe, β-Al(Fe, Cu) and λ-Al13Fe4 phases that coexist with the thermodynamic quasicrystalline phase-ϕ. In icosahedral phase oxidation of aluminum forms a dense layer on the passivating outer most surface of the quasicrystal which causes depletion in both copper and iron. It was observed not only the presence of alumina, γ-Al2O3, but also the formation of hematite and copper oxide in the dense layer. Finally, elemental analysis indicates that during alloy synthesis there is little variation of the ideal composition. The results indicate that alloys with high percentage of icosahedral phase can be obtained by casting in the air. DOI: http://dx.doi.org/10.17807/orbital.v11i3.1381 https://periodicos.ufms.br/index.php/orbital/article/view/15933icosahedral phasemechanical alloyingcharacterizationquasicrystal Al63Cu25Fe12 |
| spellingShingle | Luciano Nascimento Anastasiia Melnyk Characterization in the Icosahedral Phase of Al63Cu25Fe12 System Orbital: The Electronic Journal of Chemistry icosahedral phase mechanical alloying characterization quasicrystal Al63Cu25Fe12 |
| title | Characterization in the Icosahedral Phase of Al63Cu25Fe12 System |
| title_full | Characterization in the Icosahedral Phase of Al63Cu25Fe12 System |
| title_fullStr | Characterization in the Icosahedral Phase of Al63Cu25Fe12 System |
| title_full_unstemmed | Characterization in the Icosahedral Phase of Al63Cu25Fe12 System |
| title_short | Characterization in the Icosahedral Phase of Al63Cu25Fe12 System |
| title_sort | characterization in the icosahedral phase of al63cu25fe12 system |
| topic | icosahedral phase mechanical alloying characterization quasicrystal Al63Cu25Fe12 |
| url | https://periodicos.ufms.br/index.php/orbital/article/view/15933 |
| work_keys_str_mv | AT lucianonascimento characterizationintheicosahedralphaseofal63cu25fe12system AT anastasiiamelnyk characterizationintheicosahedralphaseofal63cu25fe12system |