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Mechanisms of Grain Growth in Free-Standing Nanograined Gold Thin Films

Published online by Cambridge University Press:  26 February 2011

J. A. Gregg ,
K Hattar ,
C H Lei  and
I M Robertson
J. A. Gregg
Affiliation:
[email protected], University of Illinois, Materials Scinece and Engineering, United States
K Hattar
Affiliation:
[email protected], University of Illinois, Materials Scinece and Engineering, United States
C H Lei
Affiliation:
[email protected], University of Illinois, Center for Microanalysis of Materials, United States
I M Robertson
Affiliation:
[email protected], University of Illinois, Materials Scinece and Engineering, United States
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Abstract

Retention of the enhanced properties reported for nanograined metallic systems requires that the nanostructure be insensitive to temperature and deformation. In situ transmission electron microscopy annealing experiments were employed to investigate the structural changes associated with the formation of micron-sized grains in nanograined evaporated gold thin films. This abnormal grain growth occurs randomly throughout the film. Twinning but not dislocation slip occurs in the growing grains until the grain size is in the hundreds of nanometer range. The twins appear to hinder growth and for grain growth to continue the twins must either be annihilated or be able to grow with the grain concurrently.

Keywords

transmission electron microscopy (TEM)Aunanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 907: Symposium MM – In-Situ Electron Microscopy of Materials , 2005 , 0907-MM06-03
Copyright
Copyright © Materials Research Society 2006

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