title: Ultrahigh Tensile Strength Nanowires with a Ni/Ni-Au Multilayer Nanocrystalline Structure.
abstract: Superior mechanical properties of nanolayered structures have attracted great interest recently. However, previously fabricated multilayer metallic nanostructures have high strength under compressive load but never reached such high strength under tensile loads. Here, we report that our microalloying-based electrodeposition method creates a strong and stable Ni/Ni-Au multilayer nanocrystalline structure by incorporating Au atoms that makes nickel nanowires (NWs) strongest ever under tensile loads even with diameters exceeding 200 nm. When the layer thickness is reduced to 10 nm, the tensile strength reaches the unprecedentedly high 7.4 GPa, approximately 10 times that of metal NWs with similar diameters, and exceeding that of most metal nanostructures previously reported at any scale.
authors.affiliation: Department of Materials Science and Engineering, Korea University , Seoul 02841, Korea.
authors.forename: Boo Hyun
authors.initials: BH
authors.lastname: An
authors.affiliation: Department of Materials Science and Engineering, Korea University , Seoul 02841, Korea.
authors.forename: In Tak
authors.initials: IT
authors.lastname: Jeon
authors.affiliation: Advanced Analysis Center, Korea Institute of Science and Technology , Seoul 02792, Korea.
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Seo
authors.affiliation: Advanced Analysis Center, Korea Institute of Science and Technology , Seoul 02792, Korea.
authors.forename: Jae-Pyoung
authors.initials: JP
authors.lastname: Ahn
authors.affiliation: Institute for Applied Materials, Karlsruhe Institute of Technology , Eggenstein-Leopoldshafen 76344, Germany.
authors.forename: Oliver
authors.initials: O
authors.lastname: Kraft
authors.affiliation: High Temperature Energy Materials Research Center, Korea Institute of Science and Technology , Seoul 02792, Korea.
authors.forename: In-Suk
authors.initials: IS
authors.lastname: Choi
authors.affiliation: Department of Materials Science and Engineering, Korea University , Seoul 02841, Korea.
authors.forename: Young Keun
authors.initials: YK
authors.lastname: Kim
keywords: Ultrastrong nanowire; microalloying; multilayer structure; nanocrystalline Ni−Au