Reactive composite-diffusing brazing of Cf/SiC composite and stainless steel with (Cu–15Ti)+C filler material

A novel joining process named reactive composite-diffusion brazing was developed to join carbon fiber reinforced SiC ceramic matrix composite (Cf/SiC) and nickel-plated stainless steel using a powder-filler of Cu–15Ti alloy and carbon (C). Based on reaction (Cu–Ti)+C + Ni→TiC+(Cu,Ni)ss, the C particles reacted with Ti element in Cu–15Ti alloy with low melting temperature formed reinforcement TiC, which improved the joint heat resistance; the Ni atoms in the nickel plating diffused into the joining layer, further improving the joint heat resistance. The initial melting temperature of the joint raised to 1025 °C, which is 130 °C higher than that of Cu–15Ti alloy.