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Exceptional resilience of small-scale Au_(30)Cu_(25)Zn_(45) under cyclic stress-induced phase transformation

Ni, Xiaoyue and Greer, Julia R. and Bhattacharya, Kaushik and James, Richard D. and Chen, Xian (2016) Exceptional resilience of small-scale Au_(30)Cu_(25)Zn_(45) under cyclic stress-induced phase transformation. Nano Letters, 16 (12). pp. 7621-7625. ISSN 1530-6984. http://resolver.caltech.edu/CaltechAUTHORS:20161107-113303591

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Abstract

Shape memory alloys that produce and recover from large deformation driven by martensitic transformation are widely exploited in biomedical devices and micro-actuators. Generally their actuation work degrades significantly within first a few cycles, and is reduced at smaller dimensions. Further, alloys exhibiting unprecedented reversibility have relatively small superelastic strain, 0.7%. These raise the questions of whether high reversibility is necessarily accompanied by small work and strain, and whether high work and strain is necessarily diminished at small scale. Here we conclusively demonstrate that these are not true by showing that Au_(30)Cu_(25)Zn_(45) pillars exhibit 12 MJ m^(−3) work and 3.5% superelastic strain even after 100,000 phase transformation cycles. Our findings confirm that the lattice compatibility dominates themechanical behavior of phase-changing materials at nano to micron scales, and points a way for smart micro-actuators design having the mutual benefits of high actuation work and long lifetime.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acs.nanolett.6b03555DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b03555PublisherArticle
ORCID:
AuthorORCID
Greer, Julia R.0000-0002-9675-1508
Bhattacharya, Kaushik0000-0003-2908-5469
Alternate Title:Exceptional resilience of small-scale Au30Cu25Zn45 under cyclic stress-induced phase transformation
Additional Information:© 2016 American Chemical Society. Received 24 August 2016; Published online 4 November 2016. XC acknowledge the financial support of the HK Research Grants Council through Early Career Scheme under Grant No. 26200316 and UGC Fund B002-0172-R9358. XN and JRG acknowledge the financial support of the U.S. Department of Energy through Early Career Research Program under Grant No. DE-SC0006599. KB and RDJ acknowledge the financial support of the Air Force Office of Scientific Research through MURI Grant No. FA9550-12-1-0458. The research of RDJ was also supported by NSF-PIRE (OISE-0967140), MURI (W911NF-07-1-0410 administered by AFOSR), ONR (N00014-14-1-0714), NSF-DMREF 1629160, the RDF Fund of the Institute on the Environment (UMN) and AFOSR (FA9550-15-1-0207).The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
Funders:
Funding AgencyGrant Number
Hong Kong Research Grant Council26200316
University Grants Committee (Hong Kong)B002-0172-R9358
Department of Energy (DOE)DE-SC0006599
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0458
NSFOISE-0967140
Army Research Office (ARO)W911NF-07-1-0410
Office of Naval Research (ONR)N00014-14-1-0714
NSFDMR-1629160
Institute on the EnvironmentUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)FA9550-15-1-0207
Department of Energy (DOE)DE-AC02-05CH11231
Subject Keywords:Nanomechanics, nano- and micro-actuation, in-situ nanocompression
Record Number:CaltechAUTHORS:20161107-113303591
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161107-113303591
Official Citation:Exceptional Resilience of Small-Scale Au30Cu25Zn45 under Cyclic Stress-Induced Phase Transformation Xiaoyue Ni, Julia R. Greer, Kaushik Bhattacharya, Richard D. James, and Xian Chen Nano Letters 2016 16 (12), 7621-7625 DOI: 10.1021/acs.nanolett.6b03555
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71769
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Nov 2016 19:49
Last Modified:04 Jan 2017 18:57

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