Porous structured thermal transfer article

A porous structure, heat transfer technology, applied in heat transfer modification, indirect heat exchanger, heat exchange equipment, etc., can solve problems such as difficult to carry out, poor overall thermal conductivity of the coating, etc.

Inactive Publication Date: 2011-05-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These coatings typically have poor bulk thermal conductivity and thus require precise control of thickness, which is difficult on substrates with three-dimensional surfaces

Method used

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  • Porous structured thermal transfer article
  • Porous structured thermal transfer article
  • Porous structured thermal transfer article

Examples

Experimental program
Comparison scheme
Effect test

example

[0063] Material

[0064] The precursor metal body comprised copper particles of 325 mesh or less with silver sputtered on them using the method described in US Patent Publication 2005 / 0095189 Al. The obtained particles contained 0.4-0.9 wt% Ag. The source of these copper particles was Chem Copp copper powder 1700 FPM (American Chemet Corporation, Deerfield, Il).

[0065]Structured heat transfer articles were prepared and boiling experiments were performed using the method described below.

[0066] Preparation of Heat Transfer Articles

example 1

[0070] Heat transfer coatings comprising precursor metal bodies were prepared as described above. Copper particles having a diameter of 75 μm and a length of 2 mm were prepared by chopping a piece of copper wool (#706, manufactured by Palmer Engineered Products (Springfield OH)). These copper fibers were manually placed at a density of about 0.025g / cm 2 Applied to the top surface of the circular zone of the heat transfer coating containing precursor metal bodies.

[0071] Both Comparative Example and Example 1 were placed in a vacuum furnace. Reduce the pressure to below 0.001 mm Hg while raising the furnace temperature to 300°C at about 14°C / min and hold at 300°C for 15 minutes to remove oil. The furnace was then heated to 850°C at about 14°C / minute, held at this temperature for one hour, and then allowed to cool to near room temperature, after which the vacuum was broken and the part removed.

[0072] liquid pool boiling

[0073] Set up a setup capable of rapidly testi...

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Abstract

Provided is a porous structured thermal transfer article comprising a plurality of precursor metal bodies and a plurality of interstitial elements disposed between and connecting the plurality of precursor metal bodies to one another and a plurality of metallic particles at least partially embedded in the interstitial elements. The precursor metal bodies comprise an inner portion comprising a first metal and an outer portion comprising an alloy comprising the first metal and a second metal. The interstitial elements comprise the alloy of the outer portion.

Description

technical field [0001] The present invention generally relates to porous structured thermal transfer articles. More particularly, the present invention relates to shaped porous metal articles and methods of making and using the same. Background technique [0002] A cooling system for a heat dissipating component includes a fluid that can evaporate or boil. The resulting vapor is then condensed using external means and returned to the evaporator. In order to improve the heat transfer of the fluid in the evaporator, porous structured heat transfer articles can be used. [0003] A variety of porous heat transfer articles are available including, for example, coatings made by flame or plasma spraying. These coatings are usually metallic and are applied to the metal substrate by a variety of methods. Using these methods, it can be difficult to control porosity and uniformly coat three-dimensional substrates. Other known coatings include conductive particles bonded to an orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/04C23C26/02
CPCF28D15/046H01L23/427F28F13/187C23C18/08C23C26/02H01L23/3733H01L2924/0002H01L2924/00
Inventor 菲利普·E·图玛
Owner 3M INNOVATIVE PROPERTIES CO
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