On the Formation of Lightweight Nanocrystalline Aluminum Alloys by Electrodeposition
New nanocrystalline aluminum alloys have been fabricated by electrodeposition. These are thermodynamically stable alloys of Al-Mn and Al-Zr with grain sizes <100 nm. Al-Mn and Al-Zr alloys are characterized here showing high strength (up to 1350 MPa) and hardness (up to 450 HVN) while maintaining the specific gravity of Al. Smooth and dense deposits plated from ionic liquids, such as EMIM:Cl (1-Ethyl-3-methylimidazolium chloride), can develop to thicknesses of 1 mm or more.
The authors would like to gratefully acknowledge additional financial support for this work under Department of Energy Award DE-EE0006842, as well as support from the MIT Institute for Soldier Nanotechnology with funding from the U.S. Army Research Laboratories (Subcontract Award 5710003947).
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