La_(1-x)Sr_xTiO_(3+δ)陶瓷涂层抗激光烧蚀性能研究

Anti-Laser Ablation Property of La_(1-x)Sr_xTiO_(3+δ) Ceramic Coating

以La_(1-x)Sr_xTiO_(3+δ)西北核技术研究所激光与物质相互作用国家重点实验室!西安710024(x=0.1)为填料,以环氧乳液为基料,采用空气喷涂制备了La_(0.9)Sr_(0.1)TiO_3涂层,并对涂层微观组织结构及抗激光烧蚀性能进行研究。结果表明:所制备的La_(0.9)Sr_(0.1)TiO_3涂层在激光功率为350 W时能够承受8 s的激光烧蚀而只发生轻微损伤,当激光功率达到1000 W时,涂层剧烈燃烧而发生严重损伤。La_(0.9)Sr_(0.1)TiO_3涂层在较大功率激光短时间烧蚀或者较小功率激光长时间烧蚀后,涂层中有机部分剧烈燃烧,直接破坏涂层结构,使涂层丧失其优异的高反射性能。

The Lao.9Sro.lTiO3 coating was prepared by air spraying technology, with organic epoxy resin as base material and highly-reflectivity La1-xSrxTiO3＋δ （x = 0.1） powder as filler material. The microstructure and anti-laser ablation properties of the prepared Lao.gSro.lTiO3 coating were studied. The results show that the La0.9Sr0.1TiO3 coating can suffer laser ablation for 8 s under 350 W with a slight damage. The organic compositions of the coating burned and the structure of the coating was damaged seriously when the laser power reached 1000 W. In this study, epoxy emulsion is chosen as the dispersing agent of powder particles, whose melting point is low. When being subjected to the laser ablation with a higher power for short time or a lower power for long time, the epoxy emulsion of coating will burn, directly causing damages in the coating structure and making it lose the excellent high reflective property.