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A low-temperature ceramic–metal joining technique was successfully developed to produce a vacuum-tight Al2O3 ceramic and 5A05 aluminum alloy joint, with leak rates of less than 1.0×10−9Pa∙m3/s. This involved two steps: active metallization of the Al2O3 ceramic surface using Ag–Cu–TiH2–B composite filler, followed by diffusion brazing of metallized Al2O3 ceramic and 5A05 alloy at 530°C. The microstructure,...
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