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San Juan J, Nó ML, Schuh CA. Nanoscale shape-memory alloys for ultrahigh mechanical damping. Nat Nanotechnol. 2009;4(7):415-9doi: 10.1038/nnano.2009.142.
San Juan, J., Nó, M. L., & Schuh, C. A. (2009). Nanoscale shape-memory alloys for ultrahigh mechanical damping. Nature nanotechnology, 4(7), 415-9. https://doi.org/10.1038/nnano.2009.142
San Juan, Jose, et al. "Nanoscale shape-memory alloys for ultrahigh mechanical damping." Nature nanotechnology vol. 4,7 (2009): 415-9. doi: https://doi.org/10.1038/nnano.2009.142
San Juan J, Nó ML, Schuh CA. Nanoscale shape-memory alloys for ultrahigh mechanical damping. Nat Nanotechnol. 2009 Jul;4(7):415-9. doi: 10.1038/nnano.2009.142. Epub 2009 Jun 07. PMID: 19581892.
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Nat Nanotechnol. 2009 Jul;4(7):415-9. doi: 10.1038/nnano.2009.142. Epub 2009 Jun 07.

Nanoscale shape-memory alloys for ultrahigh mechanical damping.

Nature nanotechnology

Jose San Juan, Maria L Nó, Christopher A Schuh

Affiliations

  1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. [email protected]

PMID: 19581892 DOI: 10.1038/nnano.2009.142

Abstract

Shape memory alloys undergo reversible transformations between two distinct phases in response to changes in temperature or applied stress. The creation and motion of the internal interfaces between these phases during such transformations dissipates energy, making these alloys effective mechanical damping materials. Although it has been shown that reversible phase transformations can occur in nanoscale volumes, it is not known whether these transformations have a sample size dependence. Here, we demonstrate that the two phases responsible for shape memory in Cu-Al-Ni alloys are more stable in nanoscale pillars than they are in the bulk. As a result, the pillars show a damping figure of merit that is substantially higher than any previously reported value for a bulk material, making them attractive for damping applications in nanoscale and microscale devices.

References

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