Vacuum brazing of TiAl intermetallic alloy to Si3N4 ceramics was performed using Ag-28Cu (wt.%) filler alloy.The brazing joints obtained at different brazing temperatures were studied in this work.The microstructure and the sequal eclipse 5 battery shear strength were analyzed in detail.
The results show that the brazed joints could be divided into three regions: AlCu2Ti reaction layer near the Ti-48Al-2Cr-2Nb alloy, a typical Ag-Cu eutectic structure and a thin continuous TiN + Ti5Si3 reaction layer near the click here Si3N4 ceramics.The microstructure varied as the brazing temperature was increased from 1153 K/15 min to 1193 K/15 min.The shear strength of the joints first increased as the brazing temperature increased from 1153 K to 1173 K, and then decreased.The maximum shear strength reached 105.
5 MPa at 1173 K/15 min and the mechanism was discussed.