Silicon nitride (Si3N4) ceramics are ideal materials for turbine blades

thermal protection systems and aerospace structural components due to their high-temperature resistance

wear resistance

high strength and excellent thermal shock resistance. However

with the development of aerospace structural components towards higher service temperature and lightweight

shortcomings of Si3N4 ceramics in terms of molding and performance gradually appears. In addition

the existing performance tests mostly focus on working conditions of normal temperature

normal pressure

and transient state

which are not being able to reflect the real service performance of Si3N4 ceramics in aerospace field

therefore need to be improved urgently. To address these problems

this paper elaborates the research progress of Si3N4 ceramics in the aspects of molding

performance testing

microstructure control and mechanical properties

discusses the current status of Si3N4 ceramic application and puts forward relevant suggestions to promote innovation and development of Si3N4 ceramics in aerospace.