航空材料学报2025，Vol.45Issue(4)：27-36,10.DOI:10.11868/j.issn.1005-5053.2025.000050
等离子喷涂用氧化铝-钛碳化硅团聚粉末的制备
Preparation of Al2O3-Ti3SiC2 agglomerated powder for plasma spraying
摘要
Abstract
High-temperature microwave-absorbing materials play a crucial role in enhancing the stealth capabilities of hot-end components in advanced warplanes.Among them,Al2O3 and Ti3SiC2 have a wide range of applications in this field.However,the two powders have poor fluidity after physical mixing,which makes them difficult to use directly for plasma spraying,so secondary granulation is required.In this research,agglomerated powders composed of Al2O3 and Ti3SiC2 are successfully prepared using centrifugal spray drying.The study indicates the influence of various factors,including slurry solid content,PVA solution content,spray disk rotational speed,inlet air temperature,and outlet air temperature,on the morphology,surface roughness,and particle size distribution of the agglomerated powders.The results show that optimizing the content of solid and PVA in the slurry is beneficial to improve the sphericity and surface roughness of the powder,controlling the rotational speed of the spray disk can effectively control the particle size distribution of the powder,and a reasonable inlet/outlet temperature will help to further improvement of the sphericity of the powder.Optimal conditions for producing high-quality agglomerated powders are:60%solid content,3%PVA solution content,a spray disk rotational speed of 40 r·min-1,an inlet air temperature of 250℃,and an outlet air temperature of 130℃.Under these conditions,the agglomerated powders exhibit high sphericity,low surface roughness,a bulk density of 1.92 g·cm-3,a fluidity of 37.1 s/50 g,and a tightly concentrated particle size distribution(D10=30.1 μm,D50=56.7 μm,and D90=90.1 μm).These powders,obtained through this method,can be directly utilized in plasma spraying and are suitable for large-scale production,thereby holding significant promise for the research and development of high-temperature wave-absorbing materials based on Al2O3 and Ti3SiC2.关键词
Al2O3-Ti3SiC2团聚粉末/喷雾造粒/形貌/流动性Key words
Al2O3-Ti3SiC2 composite powder/spray granulation/morphology/fluidity分类
航空航天引用本文复制引用
袁旭冏,郝亚鸣,胡悦,赫丽华,王智勇,王峰,王一渤,李国鹏..等离子喷涂用氧化铝-钛碳化硅团聚粉末的制备[J].航空材料学报,2025,45(4):27-36,10.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 （）
