Shape Memory and Superelasticity in Amorphous/Nanocrystalline Cu-15.0 Atomic Percent (at.%) Sn Wires


  • YZ would like to acknowledge the financial support of the National HighTechnology Research and Development Program of China (No.2009AA03Z113). PKL very much appreciates the financial support from the US National Science Foundation (DMR-0909037, CMMI-0900271, and CMMI-1100080), the Department of Energy (DOE), Office of Nuclear Energy's Nuclear Energy University Program (NEUP) 00119262, and the DOE, Office of Fossil Energy, National Energy Technology Laboratory (DE-FE-00088855) with C. Huber, C. V. Cooper, D. Finotello, A. Ardell, E. Taleff, V. Cedro, R. O. Jensen, L. Tan, and S. Lesica as contract monitors. Supporting Information is available from the Wiley Online Library or from the author.



The Cu-15.0 at.% Sn microwires with different diameter are prepared by rapid solidification from the melt using the method of glass-coated melt spinning. The amorphous/nanocrystalline structure is observed by transmission electron microscopy (TEM) and the high-resolution transmission-electron-microscopy (HRTEM). The wires with this kind of structure show perfect shape memory and superelastic effect, while it is usually brittle in a bulk polycrystalline form.