About influence of nickel alloying of PSr72 filler on capillary and contact processes during the brazing of non-metallic materials on Al₂O₃ base with titanium alloys

Abstract

The effect of nickel additives in PSr72 filler on capillary and contact processes during brazing of alumina ceramics VK94-1 with titanium VT1-0 were investigated. A special technique was developed and the suitableу device was manufactured. This technique allows to identify of influence of the experiment technological conditions: heating rate, holding time, etc. Using the methods of high-temperature capillarity studies, optical and scanning microscopy it was established that even small nickel additives significantly affect the wetting of non-metals, during melt separation in the Ag—Cu—Ti alloy the amount of the copper-base phase increases, which eutectically melts with titanium above 870 °C. The results were discussed using the thermodynamic characteristics of contacting structures.