Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures
Al–Mn alloys with Mn content ranging from 0 to 15.8 at.% are prepared by electrodeposition from an ionic liquid at room temperature, and exhibit a remarkably broad range of structures. The alloys are characterized through a combination of techniques, including X-ray diffraction, electron microscopy...
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| Format: | Article |
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Elsevier B.V.
2012
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| Online Access: | http://hdl.handle.net/1721.1/69652 https://orcid.org/0000-0001-9856-2682 |
| _version_ | 1826211976800370688 |
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| author | Ruan, Shiyun Schuh, Christopher A |
| author2 | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies |
| author_facet | Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Ruan, Shiyun Schuh, Christopher A |
| author_sort | Ruan, Shiyun |
| collection | MIT |
| description | Al–Mn alloys with Mn content ranging from 0 to 15.8 at.% are prepared by electrodeposition from an ionic liquid at room temperature, and exhibit a remarkably broad range of structures. The alloys are characterized through a combination of techniques, including X-ray diffraction, electron microscopy and calorimetry. For alloys with Mn content up to 7.5 at.%, increasing Mn additions lead to a decrease in grain size of single-phase microcrystalline face-centered cubic (fcc) Al(Mn). Between 8.2 and 12.3 at.% Mn, an amorphous phase appears, accompanied by a dramatic reduction in the size of the coexisting fcc crystallites to the ∼2–50 nm level. At higher Mn contents, the structure nominally appears entirely amorphous, but is shown to contain order in the form of pre-existing nuclei of the icosahedral quasicrystalline phase. Additionally, nanoindentation tests reveal that the nanostructured and amorphous specimens have very high hardnesses that exhibit complex trends with Mn content. |
| first_indexed | 2024-09-23T15:14:23Z |
| format | Article |
| id | mit-1721.1/69652 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:14:23Z |
| publishDate | 2012 |
| publisher | Elsevier B.V. |
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| spelling | mit-1721.1/696522022-09-29T13:34:13Z Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures Ruan, Shiyun Schuh, Christopher A Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Massachusetts Institute of Technology. Department of Materials Science and Engineering Schuh, Christopher A. Ruan, Shiyun Schuh, Christopher A. Al–Mn alloys with Mn content ranging from 0 to 15.8 at.% are prepared by electrodeposition from an ionic liquid at room temperature, and exhibit a remarkably broad range of structures. The alloys are characterized through a combination of techniques, including X-ray diffraction, electron microscopy and calorimetry. For alloys with Mn content up to 7.5 at.%, increasing Mn additions lead to a decrease in grain size of single-phase microcrystalline face-centered cubic (fcc) Al(Mn). Between 8.2 and 12.3 at.% Mn, an amorphous phase appears, accompanied by a dramatic reduction in the size of the coexisting fcc crystallites to the ∼2–50 nm level. At higher Mn contents, the structure nominally appears entirely amorphous, but is shown to contain order in the form of pre-existing nuclei of the icosahedral quasicrystalline phase. Additionally, nanoindentation tests reveal that the nanostructured and amorphous specimens have very high hardnesses that exhibit complex trends with Mn content. Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies 2012-03-14T15:42:19Z 2012-03-14T15:42:19Z 2009-05 2009-03 Article http://purl.org/eprint/type/JournalArticle 1359-6454 1873-2453 http://hdl.handle.net/1721.1/69652 Ruan, Shiyun, and Christopher A. Schuh. “Electrodeposited Al–Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures.” Acta Materialia 57.13 (2009): 3810–3822. https://orcid.org/0000-0001-9856-2682 en_US http://dx.doi.org/10.1016/j.actamat.2009.04.030 Acta Materialia Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Elsevier B.V. Prof. Schuh via Angie Locknar |
| spellingShingle | Ruan, Shiyun Schuh, Christopher A Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title | Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title_full | Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title_fullStr | Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title_full_unstemmed | Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title_short | Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures |
| title_sort | electrodeposited al mn alloys with microcrystalline nanocrystalline amorphous and nano quasicrystalline structures |
| url | http://hdl.handle.net/1721.1/69652 https://orcid.org/0000-0001-9856-2682 |
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