SiC ceramic connecting piece prepared from high-entropy multiphase ceramic connecting powder and method and application of SiC ceramic connecting piece

The invention belongs to the technical field of ceramic connection, and discloses a SiC ceramic connecting piece prepared from high-entropy multiphase ceramic connecting powder and a method and application of the SiC ceramic connecting piece. The method comprises the steps that five or more metal carbide powder and SiC powder are mixed and then dried to obtain a connecting material, the connecting surface of SiC ceramic is coated with the connecting powder, a ceramic-connecting powder-ceramic sandwich structure is formed in an attached mode, a prefabricated connecting piece is placed in a vacuum or inert atmosphere under the assistance of ultrasonic waves, the temperature is raised to 1200-1500 DEG C, heat preservation is conducted, induction connection is conducted, and the metal carbide powder-SiC ceramic composite material is obtained. And preparing the SiC ceramic connecting piece. The bending strength of the ceramic connecting piece at the room temperature is 400-540 MPa, and the bending strength of the