Improvement for Interfacial Microstructure and Mechanical Properties of Ti3SiC2/Cu Joint Brazed by Ag-Cu-Ti Filler with Copper Mesh

Ti3SiC2 ceramic and copper were successfully vacuum brazed using Ag-Cu-Ti filler with mesh, respectively. In this study, the effects of mesh brazing parameters on interface microstructure mechanical properties joints systematically studied. The results revealed that typical interfacial joint was ceramic/Ti5Si3 + TiC Ti2Cu Ti3Cu/Ag (s, s) Cu s)/eutectic Ag-Cu TiSiCu/Cu. A maximum shear strength obtained at a temperature 870 °C holding time 10 min can reached up to 66.3 ± 1.2 MPa, which 34.7% higher than without mesh. improvement property attributed extraordinary plasticity reduced residual stress caused by difference in coefficient thermal expansion joints. As further increased, decreased due excessively thick reaction layer intermetallic compounds.