Titanium nitride-reinforced zirconia toughened alumina ceramic powder and preparation method thereof

A preparation method of titanium nitride-reinforced zirconia toughened alumina (ZTA) ceramic powder, comprising the following steps:

• (1) mixing an aluminum salt, a zirconium salt, a yttrium salt, and a titanium salt with water to obtain a mixed aqueous solution, wherein the aluminum salt, the zirconium salt, the yttrium salt, and the titanium salt are water-soluble inorganic salts;
• (2) mixing the mixed aqueous solution obtained in step (1) and an alkaline precipitant for precipitation, to obtain hydroxide precipitate powder;
• (3) successively conducting a first calcination and a second calcination on the hydroxide precipitate powder obtained in step (2), to obtain oxide solid solution powder, wherein the temperature of the first calcination is 700-850° C. and the time of the first calcination is 6-12 h;
• and the temperature of the second calcination is 900-1000° C. and the time of the second calcination is 1-3 h;
• and
• (4) subjecting the oxide solid solution powder obtained in step (3) to a selective nitridation reaction, to obtain a titanium nitride-reinforced ZTA ceramic powder.