Progress of Ultra-high Temperature Oxide Ceramics: Laser Additive Manufacturing and Microstructure Evolution

Oxide ceramics, known for their outstanding strength and excellent oxidation and corrosion resistance, are prime candidates for high-temperature structural materials of aero-engines.These materials hold vast potential for application in high-end equipment fields for the aerospace industry.Compared with traditional ceramic preparation methods, laser additive manufacturing (LAM) can directly realize the integrated forming from raw powders to high-performance components in one step.LAM stands out for its high forming efficiency and good flexibility, enabling rapid production of large complex structural components with high performance and high precision.Recently, research into the laser additive manufacturing used for melt-grown oxide ceramics, which involves liquid-solid phase transition, has surged as a hot topic.This paper begins by outlining the basic principles of laser additive manufacturing technology, with an emphasis on the process characteristics of two typical laser additive technologies: selective laser melting and laser directed energy deposition.On this basis, the paper summarizes the microstructure characteristics of several differ-第*期 陈 乾, 等: 超高温氧化物陶瓷激光增材制造及组织性能调控研究进展 2 ent oxide ceramics prepared by laser additive manufacturing and examines how process parameters influence these microstructure.The differences in mechanical properties of laser additive manufactured oxide ceramics with different systems are also summarized.Finally, the existing problems in this field are sorted out and analyzed, and the future development trend is prospected.