航空材料学报2025，Vol.45Issue(4)：45-55,11.DOI:10.11868/j.issn.1005-5053.2025.000055
氧化铝-碳化硅涂层喷涂工艺优化及抗热震性能分析
Process parameter optimization and thermal shock resistance performance analysis of Al2O3-SiC coating
摘要
Abstract
To study the effect of spraying process parameters on the performance of Al2O3-SiC coatings,orthogonal tests are carried out to optimize the spraying process parameters,and the relationship between"spraying process-structure-bonding strength and thermal shock resistance"is established.The results show that the spraying power,powder feeding rate and spraying distance have no effect on the type of phases within the coating but significantly impact the coating quality and bonding strength.When the spraying power is 47 kW,the powder feeding rate is 30%,and the spraying distance is 110 mm,the coating bonding strength is the highest(10.51 MPa)and the porosity is the lowest(34.35%).Thermal shock tests show that the coating does not fall off after 200 cycles at 900℃and 1000℃,and the phases do not change.However,as the temperature is increased to 1100℃and 1200℃,partial oxidative decomposition of SiC within the coating occurs,generating Si,C,SiO2 and Al6Si2O13,thus leading to coating peeling off due to the accumulation of thermal stress and the thickening of the thermally grown oxide(TGO)layer.The coating failure mechanism mainly originates from the thermal expansion coefficient mismatch between the ceramic layer and the bonding layer,the abnormal grain coarsening of the TGO layer,and the internal crack extension.关键词
Al2O3-SiC涂层/等离子喷涂/结合强度/正交实验/抗热震性能/TGO层Key words
Al2O3-SiC coating/plasma spraying/bonding strength/orthogonal test/thermal shock resistance/TGO layer分类
通用工业技术引用本文复制引用
袁旭冏,郝亚鸣,胡悦,王智勇,赫丽华,王峰,李国鹏,王一渤..氧化铝-碳化硅涂层喷涂工艺优化及抗热震性能分析[J].航空材料学报,2025,45(4):45-55,11.基金项目
第十届中国科协人才托举工程项目(YESS20241002AE) （YESS20241002AE）
太行国家实验室技术研发项目(THL-K-24-069) （THL-K-24-069）
中国航发科技创新平台项目(CXPT-2023-031) （CXPT-2023-031）
中国航发航材院基金项目 （）
