Direct brazing of Al₂O₃ without reaction layer by self-removing oxide film Aluminum foil solder

抄録

This paper proposed a kind of Aluminum (Al) foil filler with sputtering Ni/Al double layers on surface and a brazing method of elevating temperature. Results showed that this coated foil filler could make Al₂O₃ film on aluminum surface broken and sweep them into brazing seam because it was buried by Ni/Al double layer. The direct brazing of Al alloy to Al₂O₃ could be realized without interface reaction transition layer. Rising brazing temperature could enhance the interface between seam and ceramic, making joint fracture transfer from the interface into seam gradually. The shear strength of joint was improved to the maximum of 158 MPa at above 840 °C from 49 MPa at 680 °C.