Liquid metal thermal interface material with self-gain performance
A technology of thermal interface material and liquid metal, which is applied in the direction of heat exchange materials, metal layered products, semiconductor/solid device components, etc., can solve problems such as side leakage of liquid metal, large increase in fluidity, short circuit of circuit board, etc. , to achieve low production costs, simple processing and smelting methods, and prevent side leakage
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Embodiment 1
[0018] A liquid metal composite thermal interface material structure for heat dissipation at 80°C. By weight percentage, the composition of the alloy is: Zn: 2.1%, Bi: 2.4%, Sn: 10.5%, Au: 0.3%, V: 0.1%, the balance is In. The alloy with the above composition was melted in a graphite crucible in an argon-protected vacuum induction melting furnace at 420° C., and homogenized by electromagnetic stirring for 10 minutes. The molten liquid metal is then cast into graphite molds. The liquid metal ingot is cold-rolled, and the rolling reduction in each pass is 25%, and the cold-rolling is 0.15mm. The second phase particles are selected to be a compound composed of Cu, Ti and N, and the particle size is 25 microns. The thickness of the layer with particles accounts for 10% of the total thickness, that is, the upper and lower parts account for 5% of the total thickness respectively. The volume fraction of the second phase particles in the layer is 5%. After ultrasonically dispersin...
Embodiment 2
[0020] A liquid metal composite thermal interface material structure for heat dissipation at 120°C. The composition of the alloy is: Zn: 3.1%, Bi: 2.8%, Sn: 16.4%, Au: 0.4%, V: 0.1%, the balance is In. The alloy with the above composition was melted in a graphite crucible in an argon-protected vacuum induction melting furnace at 420° C., and homogenized by electromagnetic stirring for 10 minutes. The molten liquid metal is then cast into graphite molds. The liquid metal ingot is cold-rolled, and the rolling reduction in each pass is 20%, and the cold-rolling is 0.15mm. The second phase particles are selected as a compound composed of Cu, Mo and O, and the particle size is 30 microns. The thickness of the layer with particles accounts for 10% of the total thickness, that is, the upper and lower parts account for 5% of the total thickness respectively. The volume fraction of the second phase particles in the layer is 8%. After ultrasonically dispersing the second-phase parti...
Embodiment 3
[0022] A liquid metal composite thermal interface material structure for heat dissipation at 160°C. The composition of the alloy is: Zn: 3.8%, Bi: 5.2%, Sn: 35.6%, Au: 0.4%, V: 0.1%, the balance is In. The alloy with the above composition was melted in a graphite crucible in an argon-protected vacuum induction melting furnace at 420°C, and homogenized by electromagnetic stirring for 10 minutes. The molten liquid metal is then cast into graphite molds. The liquid metal ingot is cold-rolled, and the rolling reduction in each pass is 25%, and the cold-rolling is 0.15mm. The second phase particles are selected as a compound composed of Cu, W and N, and the particle size is 30 microns. The thickness of the layer with particles accounts for 10% of the total thickness, that is, the upper and lower parts account for 5% of the total thickness respectively. The volume fraction of the second phase particles in the layer is 5%. After ultrasonically dispersing the second-phase particle...
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