Micro-structural evolution during diffusion bonding of C-SiC/C-SiC composite using Ti interlayer

摘要

AbstractDiffusion bonding of C-SiC composite was achieved with Ti interlayer at 1500°C for 3h with the applied pressure of 20MPa. The joined C-SiC composite showed the apparent shear strength of 19MPa and the sample fractured away from the joint. The microstructure of joint consists of Ti3SiC2MAX phase, TiSi2and TiC in which Ti3SiC2was the major phase. The distribution of phases in the microstructure of joint was categorized into three different zones based on electron backscattered diffraction (EBSD) results. The first zone consists of a thin continuous TiSi2phase, which was followed by a thick zone of Ti3SiC2MAX phase. In the middle of the sample, a mix phase zone was found. The reaction mechanism was established for the evolution above microstructure of joined C-SiC composite.Highlights?Formation of Ti3SiC2MAX phase in the joint of C-SiC composite?EBSD revealed three zone microstructure of the joint?Formation of a thin continuous layer of TiSi2?The apparent shear strength of 19MPa]]>