Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3183584
Keywords
copper alloys; elasticity; martensitic transformations; nanoelectromechanical devices; nanowires; nucleation; twin boundaries; zirconium alloys
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Funding
- National Natural Science Foundation of China (NSFC) [10632080, 10772169]
- National Basic Research Program of China (973 program) [2006CB300404]
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Atomistic simulations were performed to investigate the pseudoelastic effects induced by martensitic phase transformation from body-centered cubic (B2) to body-centered tetragonal (BCT) lattice in Cu-Zr nanowires. The phase transformation occurs through nucleation and propagation of {100} twin boundary, which differs from the {101} twin boundary for B2 Ni-Al nanowires. During unloading, extension strain up to 45% can be fully recovered through inverse phase transformation. The BCT lattice has also been verified to be metastable for Cu-Zr nanowires with an energy analysis along the epitaxial Bain path. Our work implies Cu-Zr nanowires may be excellent functional components for nanoelectromechanical systems.
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