The invention discloses a braze-
welding method for a
ceramic or
ceramic-based
composite material and
metal through a composite interlayer. The braze-
welding method for the
ceramic or ceramic-based
composite material and
metal solves the problems that an existing braze-
welding joint for the ceramic or ceramic-based
composite material and
metal is relatively high in
residual stress and is relatively low in reliability. The braze-welding method comprises the following steps of: I,
grinding braze-welding materials such as to-be-welded ceramic and a to-be-welded metal material; II,
coating porous ceramic with AgCuTi
powder brazing filler metal to form an interlayer, and heating and melting the interlayer, and cooling the heated and molten interlayer to obtain a ceramic-dual-phase continuous interlayer; III, superposing the to-be-welded material, AgCuTi foil-shaped
brazing filler metal, the double-phase continuous interlayer, a Ti foil, AgCuTi foil-shaped
brazing filler metal and to-be-welded ceramic from bottom to top in sequence; and IV, carrying out vacuum braze-welding on a to-be-welded part. According to the braze-welding method, a pressureless infiltration method is adopted to fill porous ceramic with liquid-state AgCuTi brazing filler metal, and AgCuTi foil, the double-phase interlayer, the Ti foil and the AgCuTi foil are superposed for being subjected to braze-welding, so that joint strength is improved.