Interface structure and strength of brazed joints between TiC ceramic and iron

Abstract

The brazing of TiC ceramic to iron was carried out at 1123–1273 K for 5–20 min using Ag–Cu–Zn filler metal. Interface structure and shear strength of joints were investigated, the former via electron probe microanalysis, scanning electron microscopy, and X-ray diffraction, and the latter via the shearing method. The results show the formation of three phases in the TiC ceramic–iron joint, namely, copper base solid solution, FeNi, and silver base solid solution. The highest joint shear strength of 256.5 MPa is obtained for a brazing temperature of 1173 K and brazing time of 5 min.