| Summary: | Exploring new armor-piercing materials is crucial for improving the penetrative ability of projectiles. Based on the process of in situ solidification injection molding through ceramic dispersant hydrolytic degradation, a ZrO<sub>2</sub> ceramic material suitable for use as the tip of a 12.7 mm kinetic energy (KE) projectile was prepared. The ZrO<sub>2</sub> ceramic tip can be matched with the metal core of a conventional projectile to form a ceramic composite projectile, increasing the damage to the Al<sub>2</sub>O<sub>3</sub> ceramic composite armor. Specifically, the ZrO<sub>2</sub> ceramic tip can increase the impact load on the Al<sub>2</sub>O<sub>3</sub> ceramic panel, prolonging the pre-damage phase and reducing the stable penetration phase, shortening the mass erosion time of the metal core compared with a 12.7 mm metal KE projectile tip. The ceramic composite projectile with the ZrO<sub>2</sub> ceramic tip has a lower critical penetration velocity than a 12.7 mm metal KE projectile for Al<sub>2</sub>O<sub>3</sub> ceramic composite armor. Furthermore, the residual velocity, residual length, and residual mass of the metal core of the ceramic composite projectile that penetrated the Al<sub>2</sub>O<sub>3</sub> ceramic composite armor are greater than those of a 12.7 mm metal KE projectile.
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