Al

2

O

3

/ZrO

2

eutectic ceramics

with excellent high-temperature mechanical properties and structural stability

  ave become potential materials for hot-end components in aero-engines and gas turbines. Laser directed energy deposition (LDED) technology overcomes the limitations of traditional fabrication methods

such as sintering deformation

by directly melting powders to enable the one-step fabrication of

complex ceramic components. The application of integral hightemperature assistance can effectively suppress cracking during the fabricating process. However

the effect of high-temperature assistance on the microstructure and properties of the fabricated components remains unclear. This work systematically investigates the evolution of the microstructure and mechanical properties of Al

2

O

3

/ZrO

2

eutectic ceramics fabricated by LDED with integral high-temperature assistance as a function of the assistance temperature. The results show that the integral hightemperature assistance significantly influences the microstructure and mechanical properties of Al

2

O

3

/ZrO

2

eutectic ceramics. At an assistance temperature of 1273 K

the grain size of the fabricated sample increases by approximately 32.16% compared to samples manufactured at room temperature. The average fracture toughness is (4.9±0.3) MPa·m

1/2

which represents a 17.2% improvement over room-temperature samples. The flexural strength and compressive strength reach their maximum at an assistance temperature of 773 K

with values of (324.27±18.23) MPa and (354.19±37.53) MPa

respectively.