Abstract
A theoretical model for describing effective thermal conductivity (ETC) of nanocrystalline materials has been proposed, so that the ETC can be easily obtained from its grain size, single crystal thermal conductivity, single crystal phonon mean free path (PMFP) and the Kaptiza thermal resistance. In addition, the relative importance between grain boundaries (GBs) and size effects on the ETC of nanocrystalline diamond at 300 K has been studied. It has been demonstrated that with increasing grain size, both GBs and size effects become weaker, while size effects become stronger on thermal conductivity than GBs effects.
Keywords
Nanocrystalline materialGrain sizeThermal conductivityMaterials scienceGrain boundaryDiamondMean free pathCrystal (programming language)Condensed matter physicsComposite materialNanotechnologyMicrostructurePhysicsElectronComputer science
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Publication Info
- Year
- 2014
- Type
- article
- Volume
- 4
- Issue
- 1
- Pages
- 7037-7037
- Citations
- 205
- Access
- Closed
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Cite This
Huicong Dong,
Bin Wen,
Roderick Melnik
(2014).
Relative importance of grain boundaries and size effects in thermal conductivity of nanocrystalline materials.
Scientific Reports
, 4
(1)
, 7037-7037.
https://doi.org/10.1038/srep07037
Identifiers
- DOI
- 10.1038/srep07037
- PMID
- 25391882
- PMCID
- PMC4229661