Kim, Ju-Young and Gu, Xun and Wraith, Matt and Uhl, Jonathan T. and Dahmen, Karin A. and Greer, Julia R. (2012) Suppression of Catastrophic Failure in Metallic Glass–Polyisoprene Nanolaminate Containing Nanopillars. Advanced Functional Materials, 22 (9). pp. 1972-1980. ISSN 1616-301X http://resolver.caltech.edu/CaltechAUTHORS:20120530-101424817
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One considerable concern in metallic glass is enhancing ductility by suppressing catastrophic failure by the instantaneous propagation of shear bands. Compressed nanopillars with alternating CuZr metallic glass and polyisoprene nanolaminates exhibit >30% enhancement in plastic flow, as compared with monolithic glass, without sacrifice of strength. A suppression of stochastic strain burst signature in these metallic glass-polymer composites is reported, which is an undesirable characteristic ubiquitously present in monolithic metallic glass and in metallic glass-metal composites. The intermittent stochastic signature is quantified in each metallic glass-containing nanolaminate system by constructing histograms of burst size distributions and provide theoretical foundation for each behavior. The exceptional mechanical properties emergent in these MG-polymer nanolaminate composites are attributed to the combination of nanometer size-induced shear band suppression in metallic glasses and the damping capability of the polyisoprene layers.
|Additional Information:||© 2012 Wiley-VCH Verlag. Article first published online: 15 Feb 2012. Manuscript Received: 16 Dec 2011. The authors gratefully acknowledge the financial support of the Defense Advanced Research Projects Agency through J.R.G.’s Young Faculty Award (grant no. N66001-09-1-2092), the United Technologies Research Center post-doctoral fellowship program at Caltech, and critical support and infrastructure provided by the Kavli Nanoscience Institute (KNI) at Caltech. J.Y.K. and J.R.G. thank Robert Maass and Dongchan Jang for useful discussion and taking TEM images. K.D. and M.W. thank Braden Brinkman, Nir Friedman, Michael LeBlanc, and Georgios Tsekenis for helpful conversations and gratefully acknowledge support from NSF via DMR 10-05209.|
|Subject Keywords:||metallic glass; nanostructures; catastrophic failure; organic-inorganic nanocomposites|
|Official Citation:||Kim, J.-Y., Gu, X., Wraith, M., Uhl, J. T., Dahmen, K. A. and Greer, J. R. (2012), Suppression of Catastrophic Failure in Metallic Glass–Polyisoprene Nanolaminate Containing Nanopillars. Adv. Funct. Mater., 22: 1972–1980. doi: 10.1002/adfm.201103050|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||30 May 2012 18:32|
|Last Modified:||30 May 2012 18:32|
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