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Nanoscale gold pillars strengthened through dislocation starvation

Greer, Julia R. and Nix, William D. (2006) Nanoscale gold pillars strengthened through dislocation starvation. Physical Review B, 73 (24). Art. No. 245410. ISSN 1098-0121.

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It has been known for more than half a century that crystals can be made stronger by introducing defects into them, i.e., by strain-hardening. As the number of defects increases, their movement and multiplication is impeded, thus strengthening the material. In the present work we show hardening by dislocation starvation, a fundamentally different strengthening mechanism based on the elimination of defects from the crystal. We demonstrate that submicrometer sized gold crystals can be 50 times stronger than their bulk counterparts due to the elimination of defects from the crystal in the course of deformation.

Item Type:Article
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Greer, Julia R.0000-0002-9675-1508
Additional Information:©2006 The American Physical Society (Received 21 April 2006; published 12 June 2006) The authors gratefully acknowledge financial support of this project through grants provided by a NSF-NIRT grant (CMS-0103257) and the Department of Energy (DE-FG03-89ER45387). We especially would like to thank W. Oliver (MTS Corporation), M. Uchic (AFRL), as well as A. Marshall, D. Pickard, G. Feng, E. Perozziello, B. Jones, and J. Cheng (Stanford University) for their help in this work.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-89ER45387
Subject Keywords:gold; nanostructured materials; dislocations; work hardening; deformation
Issue or Number:24
Record Number:CaltechAUTHORS:GREprb06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8446
Deposited By: Archive Administrator
Deposited On:13 Aug 2007
Last Modified:02 Oct 2019 23:51

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