全稳定四方相YSZ热障涂层的飞秒激光打孔工艺研究  

Study on the Femtosecond-laser Holing Process of Fully-stabilized Tetragonal YSZ Thermal Barrier Coatings

作　　者：王杰[1] 黄迪 朱文宇 鲍泽斌[2] 江阔[1] 王欣[1] Wang Jie;Huang Di;Wenyu Zhu;Zebin Bao;Jiang Kuo;Wang Xin(Southwest University of Science and Technology,Mianyang 621002,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110017,China;Xi'an Zhongke Microfine Photonics Technology Co.Ltd.,Xi'an 710048,China)

机构地区：[1]西南科技大学,绵阳621002 [2]中国科学院金属研究所,沈阳110017 [3]西安中科微精光子科技股份有限公司,西安710048

出　　处：《热喷涂技术》2023年第3期82-90,共9页Thermal Spray Technology

基　　金：国防基础科研项目(JCKY2020404B001);航空发动机及燃气轮机基础科研中心项目(P2021-A-IV-002-001);船舶动力基础科研项目(GT20220201)。

摘　　要：激光打孔是对带热障涂层高温合金冷却孔加工的重要方法。采用球形薄壁空壳全稳定纳米t’-YSZ粉体进行了全稳定四方相热障涂层的制备,并使用飞秒激光对热障涂层进行气膜孔加工。通过X射线衍射、扫描电子显微镜对涂层形貌、相组成和元素成分等进行分析。结果表明,飞秒激光制备的孔型规则,无重铸缩孔。涂层中各界面未开裂,说明涂层在加工中保持了良好的结合力。高温合金中元素成分的分布未受激光打孔的影响,说明合金基材保持了较好的化学稳定性。热障涂层经过1050℃水淬100次考核后,气膜孔形状依然保持完好,涂层未发生脱落,这说明加工了气膜孔的t’-YSZ涂层具有高抗热震性能。Laser drilling is an important method for cooling holes in superalloys with thermal barrier coatings.In this paper,fully stabilized tetragonal phase thermal barrier coatings were prepared using spherical thin-walled hollow shell fully stabilized nano t'-YSZ powders,and the thermal barrier coatings were subjected to film hole processing using a femtosecond laser.The results show that the holes prepared by femtosecond laser are regular with no recast and shrinkage.There was no cracking at each interface in the coating,indicating that the coating maintained a good bond during processing.The distribution of elemental compositions in the superalloys was not affected by laser drilling,indicating that the alloy substrate material maintained good chemical stability.After the thermal barrier coating was quenched at 1050℃for 100 times,the shape of the air film holes remained intact and the coating did not peel off.It indicates that the t'-YSZ coatings with processed film holes have high thermal shock resistance.

关 键 词：全稳定纳米t’-YSZ 热障涂层 气膜孔 飞秒激光 

分 类 号：TG174.4[金属学及工艺—金属表面处理]