Aluminum-silicon/aluminum-silicon carbide composite material, preparation method thereof, and electronic packaging device
A composite material, aluminum silicon carbide technology, applied in chemical instruments and methods, metal material coating technology, circuits, etc., can solve problems such as unstable welds, and achieve the effect of improving stability
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[0040] Another invention of the present invention also provides the preparation method of composite material, comprises the following steps:
[0041] 1) Put the aluminum-silicon material layer prepared by spray deposition on the top surface of the silicon carbide preform to obtain the composite preform 731, put the composite preform into a mold and preheat at a constant temperature of 600°C to 650°C for 2 hours to 3 hours Hour;
[0042] 2) melting the aluminum alloy to obtain liquid aluminum 742;
[0043] 3) After evacuating, fill with inert gas to a constant temperature and pressure of 1.5MPa-2.0MPa for 5 minutes to 15 minutes, then lower the temperature and pressurize to 8MPa-12MPa to obtain an aluminum-silicon / aluminum-silicon carbide composite material.
[0044] The method is carried out by means of a vacuum pressure infiltration furnace. Vacuum pressure infiltration furnace structure see Figure 5 , The vacuum pressure infiltration furnace includes a furnace body 70 an...
Embodiment 1
[0070] 1) Preparation of silicon carbide preforms
[0071] Weigh 85 g of silicon carbide particles A (average particle size: 63 μm), 15 g of silicon carbide particles B (average particle size: 12 μm), 20 g of polyvinyl alcohol solution, and 4.5 g of aluminum dihydrogen phosphate, and mix them with a stirring kneader for 1 hour to prepare granules, under the pressure of 100MPa, the silicon carbide green compact with the size of 100mm×70mm×10mm was made into a silicon carbide green blank, and the silicon carbide preform was obtained after sintering at a rate of 3°C / min to 800°C and a constant temperature of 1.5 hours, with a density of 1.91g / cm 3 . CNC milling is used to mill a 95mm×70mm×1.6mm groove on the 100mm×70mm plane of the silicon carbide preform.
[0072] 2) Preparation of laser welding layer
[0073] The laser welding layer is processed into a laser welding layer with a size of 94.6mm×69.6mm×1.55mm by using the aluminum-silicon material obtained by spray deposition...
Embodiment 2
[0082] 1) Preparation of silicon carbide preforms
[0083] Weigh 70g of silicon carbide particles A (average particle size: 80μm), 21g of silicon carbide particles B (average particle size: 14μm) and 9g of silicon carbide particles C (average particle size: 2μm), 20g of polyvinyl alcohol solution and aluminum dihydrogen phosphate 4.5g, mixed with a stirring kneader for 1 hour, then granulated, pressurized at a pressure of 100MPa to form a flat silicon carbide green body with a size of 105mm×72mm×10mm, and raised to 800℃ at a rate of 3℃ / min for 1.5 hours After sintering, a silicon carbide preform is obtained with a density of 2.35 g / cm 3 . obtained by CNC milling Figure 4 SiC housing preform shown.
[0084] 2) Preparation of laser welding layer
[0085] The laser welding layer is made of aluminum-silicon material obtained by spray deposition as a raw material to form a laser welding layer with an outer ring size of 98.0mm×71.6mm, an inner ring size of 94.2mm×64.2mm, and a ...
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