Preparation method of high-entropy nitride ceramic with silicon carbide as sintering aid

The invention discloses a preparation method of high-entropy nitride ceramic with silicon carbide as a sintering aid. The preparation method comprises the steps of raw material treatment, powder synthesis, additive mixing treatment, ceramic sintering and the like. The method comprises the following steps: by taking HfO2, ZrO2, TiO2, Nb2O5, Ta2O5 and Si3N4 as raw materials, carrying out mechanical ball milling for 5 to 10 hours, and then synthesizing the submicron single-phase (Hf < 0.2 > Zr < 0.2 > Ti < 0.2 > Nb < 0.2 > Ta < 0.2 >) N high-entropy powder at the temperature of 1,800 DEG C; then, the high-entropy powder is used as a raw material, SiC is added to serve as a sintering aid, and SPS is adopted for sintering at the temperature of 1900-2100 DEG C to prepare the (Hf < 0.2 > Zr < 0.2 > Ti < 0.2 > Nb < 0.2 > Ta < 0.2 >) N high-entropy ceramic added with 5-15 mol% of SiC. According to the preparation method of the high-entropy nitride ceramic taking silicon carbide as the sintering aid, the sintering aid