Projects per year
Abstract
The exceptionally high thermal conductivity of polycrystalline diamond (∼2000Wm-1K-1) makes it a very attractive material for optimizing the thermal management of high-power devices. In this paper, the thermal conductivity of a diamond sample capturing grain size evolution from nucleation towards the growth surface is studied using an optimized 3ω technique. The thermal conductivity is found to decrease with decreasing grain size, which is in good agreement with theory. These results clearly reveal the minimum film thickness and polishing thickness from nucleation needed to achieve single-crystal diamond performance, and thus enable production of an optimal polycrystalline diamond for heat-spreading applications.
Original language | English |
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Article number | 061302 |
Number of pages | 4 |
Journal | Applied Physics Express |
Volume | 9 |
Issue number | 6 |
Early online date | 9 May 2016 |
DOIs | |
Publication status | Published - 1 Jun 2016 |
Research Groups and Themes
- CDTR
Fingerprint
Dive into the research topics of 'Effect of grain size of polycrystalline diamond on its heat spreading properties'. Together they form a unique fingerprint.Projects
- 1 Finished
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Novel High Thermal Conductivity Substrates for GaN Electronics: Thermal Innovation
Kuball, M. H. H. (Principal Investigator)
8/07/13 → 8/10/16
Project: Research