Alumina/alumina ceramic matrix composites (Al

2

O

3

/Al

2

O

3

CMCs) have demonstrated broad application prospects in aerospace

energy

and other high-temperature fields due to their low cost

short fabrication cycles

and excellent oxidation resistance. This review systematically summarizes the key challenges and recent advances in the preparation of Al

2

O

3

/Al

2

O

3

CMCs

focusing on core technical issues such as low-temperature sintering

homogeneous densification

and microstructure control. A comparative analysis of fabrication techniques

including sol-gel

slurry infil

tration

and automated fiber placement

highlights their respective advantages and limitations. Furthermore

practical applications in aircraft engine combustors

exhaust components

aerospace thermal protection systems

high-temperature parts in automotive and low-altitude unmanned aerial vehicle

and industrial kilns are discussed

demonstrating the material’s superior thermal stability and lightweight potential. Future research should prioritize process optimization

strengthen automated production

and expand application scenarios to further advance the development of high-temperature structural materials.