Method for connecting AlN (aluminum nitride) ceramics and SiC/Al composite material respectively plated with thin-film metal layer on surface
A thin-film metal layer and composite material technology, applied in the direction of welding/cutting media/materials, metal processing equipment, welding media, etc., can solve the problems of high melting point and unsuitable connection of AlN and Al-based composite materials
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Embodiment 1
[0014] Example 1: The Al-Ag-Cu solder flakes were polished smooth to 0.1mm, cleaned with acetone solution and soaked in fluoride flux for 5 seconds, then placed between the welding surfaces of AlN and SiCp / Al, and Add a small piece of briquette to make full contact between the solder and the base metal, and put the above prepared materials into the brazing furnace; Pour argon into the brazing furnace, and heat it up to 570 °C at a rate of 10 °C / min. And keep it for 10min, and finally cool to room temperature with the furnace, the connection between aluminum nitride and silicon aluminum carbide base can be realized, the shear strength of the brazed joint reaches more than 100MPa, and the air tightness is 1.0×10 -11 Pa·m 3 / s, all meet the national standard.
Embodiment 2
[0015] Example 2: The Al-Ag-Cu solder was polished smooth to 0.2mm, cleaned and soaked in fluoride flux for 5 seconds, then placed between the welding surfaces of AlN and SiCp / Al, and a small piece was added Press the block to make the base metal fully contact with the solder, put the above prepared materials into the brazing furnace; pass argon gas into the brazing furnace, raise the temperature to 580 °C at a rate of 10 °C / min, and keep the temperature for 5 minutes, and finally follow the The furnace is cooled to room temperature, and the shear strength of the brazed joint is above 100MPa, and the air tightness is 1.0×10 -11 Pa·m 3 / s, all meet the national standard.
Embodiment 3
[0016] Example 3: The Al-Ag-Cu solder was polished smooth to 0.3mm, cleaned and soaked in fluoride flux for 5 seconds, then placed between the welding surfaces of AlN and SiCp / Al, and a small piece was added Press the block to make the base metal fully contact with the solder, and put the above prepared materials into the brazing furnace; pass the brazing furnace into argon, and heat it up to 590 °C at a rate of 10 °C / min; keep the temperature for 3 minutes; After cooling to room temperature, the connection can be realized. The shear strength of the brazed joint reaches more than 100MPa, and the air tightness is 1.0×10 -11 Pa·m 3 / s, all meet the national standard.
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