Orientation-phase-space-averaged properties of grain boundaries
- 1 August 1995
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 72 (2) , 71-77
- https://doi.org/10.1080/09500839508241616
Abstract
The orientation-phase-space-averaged excess volume associated with grain boundaries in nanocrystalline Pd has been deduced from a rule-of-mixtures analysis of density and thermal expansion coefficient measurements. The atomic density is found to fluctuate along the grain-boundary core with an amplitude that could be reduced by low-temperature annealing of the sample. The scaling relation between resistivity and crystallite size changes significantly below approximately 7nm, suggesting that, in this limit, the intrinsic nature of a grain boundary becomes coupled to its spatial extent.Keywords
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