激光沉积制备Al2O3添加NiCrAl涂层及性能分析
Preparation and Performance Analysis of Al2O3 Added NiCrAl Coating by Laser Deposition
秦飞跃1
作者信息
- 1. 黄河交通学院机电工程学院,河南 焦作 454000
- 折叠
摘要
通过激光沉积制得NiCrAlY+10％Al2O3、100％NiCrAlY与NiCrAlY+20％Al2O3试样,对各试样进行了XRD、SEM表征,分析了各试样物相成分、显微组织形貌,同时利用显微硬度计测试了各涂层表面显微硬度.研究结果表明:将Al2O3加入NiCrAlY后,在晶粒与晶界部位形成了许多尺寸在2 µm以内的Al2O3球形小颗粒,形成了间距更小的涂层一次枝晶臂,同时形成了比例更低的Ni-Y相,基体组织中形成了弥散态的Y2O3陶瓷颗粒.随着Al2O3添加量提高后,涂层硬度发生了明显增大.该研究有助于提高激光增材制造质量,为后续的工艺参数优化奠定一定的理论基础.
Abstract
NiCrAlY+10％ Al2O3,100％NiCrAlY,and NiCrAlY+20％ Al2O3 samples were prepared by laser deposition.XRD and SEM characterization were performed on each sample,and the phase composition and microstructure morphology of each sample were analyzed.At the same time,the microhardness of each coating surface was tested using a microhardness tester.The research results showed that after adding Al2O3 to NiCrAlY,many spherical Al2O3 particles with a size of less than 2 μm were formed at the grain and grain boundaries,forming primary dendrite arms with smaller spacing in the coating.At the same time,a lower proportion of Ni-Y phase was formed,and dispersed Y2O3 ceramic particles were formed in the matrix structure.As the amount of Al2O3 added increased,the coating hardness significantly increased.This study contributes to improving the quality of laser additive manufacturing and lays a theoretical foundation for subsequent process parameter optimization.
关键词
激光沉积/NiCrAlY涂层/Al2O3/显微硬度/微观组织Key words
laser deposition/NiCrAlY coating/Al2O3/microhardness/microstructure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据