Aluminum-silicon/aluminum-silicon carbide composite material, preparation method thereof and electronic packaging device
A technology of aluminum silicon carbide and composite materials, applied in chemical instruments and methods, metal material coating technology, circuits, etc., can solve problems such as weld instability and achieve the effect of improving stability
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[0041] Another invention of the present invention also provides the preparation method of composite material, comprises the following steps:
[0042] 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 550°C to 650°C for 2 hours to 3 hours Hour;
[0043] 2) melting the aluminum alloy to obtain liquid aluminum 742;
[0044] 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.
[0045] 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 70 g of silicon carbide particles A (average particle size: 80 μm), 30 g of silicon carbide particles B (average particle size: 14 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 blank with the size of 105mm×74mm×10mm was made into a silicon carbide green body, and the silicon carbide preform was obtained after the speed was increased to 800℃ at a rate of 3°C / min for 1.5 hours, and the density was 2.07g / cm 3 . A 96mm×74mm×1mm groove is machined on a 105mm×74mm plane by CNC milling.
[0072] 2) Preparation of laser welding layer
[0073] The commercially available spray-deposited aluminum-silicon material (after testing, the mass percent content of silicon is 48%, the average particle size of silicon particles is about 90 μm, and the oxygen content is...
Embodiment 2
[0086] 1) Preparation of silicon carbide preform
[0087] Weigh 68g of silicon carbide particles A (average particle size: 80 μm), 32 g of silicon carbide particles B (average particle size: 14 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, pressurized under a pressure of 100MPa to form a silicon carbide green body with a size of 120mm×85mm×11mm, and sintered at a constant temperature of 800℃ for 1.5 hours at a rate of 3°C / min to obtain a silicon carbide preform with a density of 2.15g / cm 3 . A 110mm×85mm×1.2mm groove is machined on a 120mm×85mm plane by CNC milling.
[0088] 2) Preparation of laser welding layer
[0089] The commercially available spray-deposited aluminum-silicon material (the mass percent content of silicon is 50%, the average particle size of silicon particles is about 80 μm, and the oxygen content is 800×10 -6 ) into a sheet material of 109.4mm×8...
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