拉瓦尔喷嘴与直喷嘴对等离子喷涂NiCrAlY涂层组织及性能的影响  

Microstructure and property characterization of the APS NiCrAlY coatings prepared by Laval nozzle and straight nozzle

作　　者：王枫[1] 曾威[1] 陈志坤[1] 朱晖朝[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院),广东广州510650

出　　处：《材料研究与应用》2012年第1期50-53,共4页Materials Research and Application

摘　　要：分别用拉瓦尔喷嘴和直喷嘴,采用等离子喷涂方法制备NiCrAlY涂层,并测试了不同喷嘴所制备的涂层的性能及组织的差异.试验结果表明:所制备的NiCrAlY涂层均具有明显的层状组织,涂层颗粒界线明显;直喷嘴制备的NiCrAlY涂层中有明显的未熔颗粒;拉瓦尔喷嘴制备的涂层与直喷嘴的相比,涂层显微硬度和结合强度更高.NiCrAlY coatings were sprayed by APS with Laval nozzle and straight nozzle.The microstructure and properties of the coatings were characterized.The results indicated that the NiCrAlY coatings presented lamellar structures and apparent boundaries between splats.Some unmelted particles were included in the coating sprayed with the straight nozzle.The coating sprayed with Laval nozzle showed higher microhardness and bond strength than the coating sprayed with straight nozzle.

关 键 词：等离子喷涂 NICRALY 拉瓦尔喷嘴 直喷嘴 未熔颗粒 

分 类 号：TG174.442[金属学及工艺—金属表面处理]