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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Bibliographic Details
Main Authors: Ruan, Shiyun (Contributor), Schuh, Christopher A (Author)
Other Authors: Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contributor), Massachusetts Institute of Technology. Department of Materials Science and Engineering (Contributor), Schuh, Christopher A. (Contributor)
Format: Article
Language:English
Published: Elsevier B.V., 2012-03-14T15:42:19Z.
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Online Access:Get fulltext
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042 |a dc 
100 1 0 |a Ruan, Shiyun  |e author 
100 1 0 |a Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies  |e contributor 
100 1 0 |a Massachusetts Institute of Technology. Department of Materials Science and Engineering  |e contributor 
100 1 0 |a Schuh, Christopher A.  |e contributor 
100 1 0 |a Ruan, Shiyun  |e contributor 
100 1 0 |a Schuh, Christopher A.  |e contributor 
700 1 0 |a Schuh, Christopher A  |e author 
245 0 0 |a Electrodeposited Al-Mn Alloys with Microcrystalline, Nanocrystalline, Amorphous and Nano-quasicrystalline Structures 
260 |b Elsevier B.V.,   |c 2012-03-14T15:42:19Z. 
856 |z Get fulltext  |u http://hdl.handle.net/1721.1/69652 
520 |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. 
520 |a Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies 
546 |a en_US 
655 7 |a Article 
773 |t Acta Materialia