Changes in the mechanism of heat transfer in passing from microparticles to nanoparticles
- 作者: Shakhov F.1, Meilakhs A.1, Eidelman E.1,2
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隶属关系:
- Ioffe Physical Technical Institute
- St. Petersburg State Chemical-Pharmaceutical Academy
- 期: 卷 42, 编号 3 (2016)
- 页面: 252-255
- 栏目: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/197727
- DOI: https://doi.org/10.1134/S1063785016030135
- ID: 197727
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详细
On the basis of experimental data on thermal conduction and sound velocity in composites obtained by sintering detonation nanodiamonds with the crystallite size of 4–5 nm and diamond micropowders with a grain size of about 10 μm at a high pressure (5–7 GPa) and high temperature (1200–1800°C), mechanisms of heat transfer in such structures are suggested. These mechanisms are shown to be different in composites of micro- and nanoparticles. In composites of micrometer particles, the conventional macroscopic mechanism of phonon propagation is active. In composites with a grain size of a few nanometers, the main contribution comes from thermal resistance on grain boundaries.
作者简介
F. Shakhov
Ioffe Physical Technical Institute
Email: mejlaxs@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021
A. Meilakhs
Ioffe Physical Technical Institute
编辑信件的主要联系方式.
Email: mejlaxs@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021
E. Eidelman
Ioffe Physical Technical Institute; St. Petersburg State Chemical-Pharmaceutical Academy
Email: mejlaxs@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021; St. Petersburg, 197376