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US 7,695,808 B2Granted
Thermal transfer coating
Assignee3M Innovative Properties Company
InventorsPhillip E. Tuma, Gary M. Palmgren
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Abstract
Thermal transfer coating comprising a plurality of metal bodies and a plurality of interstitial elements disposed between and connecting the plurality of metal bodies to one another. The 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.
Claims39
A thermal transfer coating on a substrate, comprising:
- a plurality of metal bodies on the substrate, the metal bodies comprising an inner portion comprising a first metal selected from the group consisting of aluminum, copper, silver, and alloys thereof and an outer portion comprising an alloy comprising the first metal and a second metal selected from the group consisting of copper, silver, and magnesium, wherein said first metal and said second metal are different;
- and
- a plurality of interstitial elements disposed between and connecting said plurality of metal bodies to one another, said interstitial elements comprising said alloy of said outer portion;
- wherein said thermal transfer coating has an effective porosity of at least 10 percent.
1 more element
A thermal transfer coating on a substrate, comprising:
- a plurality of composite bodies on the substrate, the composite bodies comprising an inner portion comprising diamond and a first metal selected from the group consisting of aluminum, copper, silver, and alloys thereof, and an outer portion comprising an alloy comprising the first metal and a second metal selected from the group consisting of copper, silver, and magnesium, wherein said first metal and said second metal are different;
- and
- a plurality of interstitial elements disposed between and connecting said plurality of metal bodies to one another, said interstitial elements comprising said alloy of said outer portion.
A method of coating a heat-dissipating substrate comprising:
- providing a heat-dissipating substrate having an outer surface;
- depositing a composition comprising a binder and a plurality of metal bodies onto said heat-dissipating substrate, said metal bodies comprising an inner portion comprising a first metal having a melting temperature Tmp1, and an outer portion comprising a second metal having a melting temperature Tmp2;
- and
- heating said composition to a temperature less than Tmp1 and Tmp2 to form an alloy comprising said first metal and said second metal that bonds said plurality of metal bodies to one another and said heat-dissipating substrate, wherein said plurality of metal bodies and said alloy form a porous matrix having an effective porosity of at least 10 percent.
1 more element
Dependencies are inferred from the claim text.