Title

Grain size dependence of the twin length fraction in nanocrystalline Cu thin films via transmission electron microscopy based orientation mapping

Authors

Authors

X. Liu; N. T. Nuhfer; A. P. Warren; K. R. Coffey; G. S. Rohrer;K. Barmak

Comments

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Abbreviated Journal Title

J. Mater. Res.

Keywords

BOUNDARY-CHARACTER-DISTRIBUTION; ANNEALING TWINS; FCC METALS; BACKSCATTER DIFFRACTION; COPPER; ENERGIES; CRYSTALS; TEXTURE; CONDUCTIVITY; POLYCRYSTALS; Materials Science, Multidisciplinary

Abstract

Transmission electron microscopy (TEM) based orientation mapping has been used to measure the length fraction of coherent and incoherent Sigma 3 grain boundaries in a series of six nanocrystalline Cu thin films with thicknesses in the range of 26-111 nm and grain sizes from 51 to 315 nm. The films were annealed at the same temperature (600 degrees C) for the same length of time (30 min), have random texture, and vary only in grain size and film thickness. A strong grain size dependence of Sigma 3 (coherent and incoherent) and coherent Sigma 3 boundary fraction was observed. The experimental results are quantitatively compared with three physical models for the formation of annealing twins developed for microscale materials. The experimental results for the nanoscale Cu films are found to be in good agreement with the two microscale models that explain twin formation as a growth accident process.

Journal Title

Journal of Materials Research

Volume

30

Issue/Number

4

Publication Date

1-1-2015

Document Type

Article

Language

English

First Page

528

Last Page

537

WOS Identifier

WOS:000350633500009

ISSN

0884-2914

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