Study on Bonding of Al₂O₃ Tube/Metal Flange

Abstract

New bonding method and adequate joint structure for residual thermal stress relief at bonding Al₂O₃ tube to metal flange were investigated.
Main results obtained are as follows.
(1) Ag-Cu-Ti brazing after Cu₂O+Cu plating on A1₂O₃ tube and sandwich joint structure using assisted A1₂O₃ tube snipped thin Kovar flange were established.
(2) It was confirmed that cavity coupler, ion accelerater tube brazed by the above mentioned method had excellent leak tight property (<1×10^-9 Torr⋅l/s) and this vacuum brazing method could replace Mo-Mn process.