Extreme Two-Phase Cooling from Laser-Etched Diamond and Conformal, Template-Fabricated Microporous Copper
- Authors
- Palko, James W.; Lee, Hyoungsoon; Zhang, Chi; Dusseault, Tom J.; Maitra, Tanmoy; Won, Yoonjin; Agonafer, Damena D.; Moss, Jess; Houshmand, Farzad; Rong, Guoguang; Wilbur, Joshua D.; Rockosi, Derrick; Mykyta, Ihor; Resler, Dan; Altman, David; Asheghi, Mehdi; Santiago, Juan G.; Goodson, Kenneth E.
- Issue Date
- Dec-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- boiling; diamond; laser ablation; porous copper; templated electrodeposition
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.27, no.45
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 27
- Number
- 45
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3510
- DOI
- 10.1002/adfm.201703283
- ISSN
- 1616-301X
1616-3028
- Abstract
- This paper reports the first integration of laser-etched polycrystalline diamond microchannels with template-fabricated microporous copper for extreme convective boiling in a composite heat sink for power electronics and energy conversion. Diamond offers the highest thermal conductivity near room temperature, and enables aggressive heat spreading along triangular channel walls with 1:1 aspect ratio. Conformally coated porous copper with thickness 25 mu m and 5 mu m pore size optimizes fluid and heat transport for convective boiling within the diamond channels. Data reported here include 1280 W cm(-2) of heat removal from 0.7 cm(2) surface area with temperature rise beyond fluid saturation less than 21 K, corresponding to 6.3 x 10(5) W m(-2) K-1. This heat sink has the potential to dissipate much larger localized heat loads with small temperature nonuniformity (5 kW cm(-2) over 200 mu m x 200 mu m with <3 K temperature difference). A microfluidic manifold assures uniform distribution of liquid over the heat sink surface with negligible pumping power requirements (e.g., <1.4 x 10(-4) of the thermal power dissipated). This breakthrough integration of functional materials and the resulting experimental data set a very high bar for microfluidic heat removal.
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