The invention discloses a
brazing method for
silicon carbide ceramics. The
brazing method comprises the following steps: carrying out surface treatment on the
silicon carbide ceramics; depositing a first
metal layer on the surface of the
silicon carbide ceramics by adopting a vapor deposition method, and then depositing a second
metal layer on the surface of the first
metal layer to obtain the
silicon carbide ceramics deposited with double metal
layers, wherein the material of the first metal layer is selected from one of Ni, Ti, Fe or Zr, and material of the second metal layer is selected from Al; placing the
silicon carbide ceramics needing to be connected in a
vacuum sintering furnace, then placing a pure Al foil between the
silicon carbide ceramics needing to be connected, starting heating when vacuum in the furnace reaches 10 <-1 > Pa, increasing the temperature to 600-800 DEG C, and conducting heat preservation for 10-60 min; and after heat preservation is finished, performing cooling to
room temperature along with the furnace to obtain the silicon carbide ceramics subjected to
brazing connection. According to the brazing method for the silicon carbide ceramics, the wettability of aluminum-based brazing
filler metal to the silicon carbide material can be improved, the brazing temperature can be reduced, and the
bonding strength of a brazed joint can be improved.