| 摘要: |
| 为解决 YSZ(Y2O3 部分稳定的 ZrO2 ) 陶瓷基高温封严涂层沉积效率较低和易于过早剥落失效的问题,选择氧化铝 (Al 2O3 )、钇铝石榴石(Y3Al 5O12 ,YAG)及镁铝尖晶石(MgAl 2O4 )为三种高温黏结相,通过喷雾造粒的方法分别制备出 B0(无黏结相)、B1(含 Al 2O3 )、B2(含 YAG)和 B3(含 MgAl 2O4 )等四种 YSZ 基团聚颗粒,研究黏结相对涂层沉积效率和热循环性能的影响。 结果表明,YAG 的黏附和包裹作用最强,与 B0 型粉末相比,B2 型粉末的沉积效率提高了 181. 49%;热循环过程中不断增长的裂纹扩展驱动力和陶瓷材料的脆性属性是导致陶瓷涂层剥落失效的主要原因,由于 YAG 相的弥散增韧作用,B2 型涂层的断口呈现出类韧窝形貌,与 B0 型涂层相比,B2 型涂层的断裂韧性提高了 39. 76%,热循环寿命提高了 43. 68%。 YAG 黏结相的添加显著地提高了 YSZ 陶瓷基高温封严涂层的沉积效率,同时较好地提高了涂层的热循环寿命。 |
| 关键词: 黏结相 YSZ 基高温封严涂层 沉积效率 热循环性能 |
| DOI：10.11933/j.issn.1007-9289.20210827001 |
| 分类号:TG174 |
| 基金项目:天津市教委自然科学研究(2020KJ030)；中央高校基本科研业务费(3122020057) 资助项目 |
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| Effects of Bonding Phases on Deposition Efficiency and Thermal Cycling Performance of YSZ-based Sealing Coating |
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CHENG Taotao1,2, WANG Zhiping1,2, DAI Shijie1, WANG Shicheng2, XING Sijia2, MA Xiang3
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1.School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401 , China;2.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China, Tianjin 300300 , China;3.Engine Overhaul Department, Aircraft Maintenance and Engineering Corporation, Beijing 100621 , China
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| Abstract: |
| In order to solve the problems of low deposition efficiency (DE) and premature spalling failure of YSZ (Y2O3 partially stabilized ZrO2 )-based high temperature sealing coating, four types of YSZ-based agglomerated powder containing no bonding phase, Al 2O3 , yttrium aluminum garnet (YAG), and MgAl 2O4 , respectively, labeled as B0, B1, B2, and B3, which are prepared by spray granulation. Effects of bonding phases on DE and thermal cycling performance of YSZ-based sealing coating by atmospheric plasma spraying (APS) are analyzed. The results show that, YAG has the strongest adhesion effect and wrapping effect, compared with B0 powder, the DE of B2 powder is increased by 181. 49%. The growing driving force of crack propagation and the brittleness of ceramic materials during thermal cycling are the main reasons for the spalling failure of ceramic coatings. Due to the dispersion toughening effect of YAG phase, the fracture of B2 coating presents a dimple-like morphology. Compared with B0 coating, the fracture toughness of B2 coating is increased by 39. 76% and the thermal cycle lives are increased by 43. 68%. The addition of YAG phase significantly improves the DE of YSZ-based high temperature sealing coating, and effectively improves the thermal cycle lives of the coating. |
| Key words: bonding phase YSZ-based high temperature sealing coating deposition efficiency thermal cycling performance |
