Connecting piece of silicon carbide composite material and high-temperature alloy as well as connecting method and application of connecting piece

The invention belongs to the technical field of ceramic and high-temperature alloy connection, and discloses a connecting piece of a silicon carbide composite material and a high-temperature alloy and a connecting method and application of the connecting piece. The method comprises the following steps: etching a high-temperature alloy with surface textures on a connecting surface of the high-temperature alloy by using a pulse fiber laser; nITE phase powder and a solvent are subjected to ultrasonic mixing to obtain connecting slurry, the connecting surface of the silicon carbide composite material and the texture surface of the high-temperature alloy are coated with the slurry, a silicon carbide composite material-NITE phase-high-temperature alloy structure is formed through stacking, and a prefabricated connecting piece is obtained; and the prefabricated connecting piece is placed in an inert atmosphere, heat preservation is conducted for 10-30 min under the conditions that the temperature ranges from 1450 DE