垂直冲液辅助对镍-氧化铈复合电铸层微观结构的影响  

Effect of the assistance of vertical flushing during electroforming on microstructure of Ni–CeO2 composite coating

作　　者：钱王欢[1] 王松雷[2] 周丽 于金程 张韬 QIAN Wanghuan;WANG Songlei;ZHOU Li;YU Jincheng;ZHANG Tao(School of Mechanical Technology,Wuxi Institute of Technology,Wuxi 214121,China;Wuxi Branch of Jiangsu Institute of Safety Supervision and Inspection of Special Equipment,Wuxi 214174,China)

机构地区：[1]无锡职业技术学院机械技术学院,江苏无锡214121 [2]江苏省特种设备安全监督检验研究院无锡分院,江苏无锡214174

出　　处：《电镀与涂饰》2023年第1期18-23,共6页Electroplating & Finishing

基　　金：江苏省“333工程”科研项目(BRA2019291);江苏省精密与微细制造技术重点实验室开放基金项目。

摘　　要：在垂直冲液条件下进行以纳米CeO_(2)颗粒(平均粒径50 nm)为增强相的Ni基复合电铸,以改善复合电铸层的微观组织结构,提高其显微硬度。电铸液组成和工艺条件为:氨基磺酸镍400 g/L,氯化镍15 g/L,硼酸30 g/L,p H=4.5,温度43℃,垂直冲液速率0.5m/s,阴极电流密度4A/dm^(2)。研究了垂直冲液对复合电铸层微观形貌、结晶取向、晶粒尺寸及显微硬度的影响。结果表明:在电铸过程中施加垂直冲液能够显著减少纳米颗粒的团聚现象,提高纳米颗粒在复合电铸层中的含量和分布均匀性,并使镀层晶粒显著细化,在(200)晶面的择优取向程度明显得到了加强,显微硬度提高了22%。Nickel-based composite electroforming with CeO_(2)nanoparticles as reinforcing phase was conducted with the assistance of vertical flushing to improve the microstructure and microhardness of the electroformed coating.The electroforming bath composition and process conditions were as follows:nickel sulfamate 400 g/L,nickel chloride 15 g/L,boric acid 30 g/L,pH 4.5,temperature 43℃,vertical flushing speed 0.5 m/s,and cathodic current density 4 A/dm^(2).The effect of vertical flushing on the microstructure,crystal orientation,grain size,and microhardness of the electroformed composite coating was studied.The results showed that the vertical flushing during the electroforming process brought benefits as follows:(a)the content of nanoparticles in the composite coating was increased and their distribution was more uniform due to the less agglomeration of them;(b)the grains of the composite coating were refined and the preferred orientation of(200)plane was enhanced;and(c)the microhardness of the composite coating was 22%higher than that electroformed without the assistance of vertical flushing.

关 键 词：镍 纳米氧化铈颗粒 复合电铸 垂直冲液 微观结构 显微硬度 

分 类 号：TQ153.2[化学工程—电化学工业]