摘要
系统地论述了脉冲电沉积的机理及其动力学原理。根据脉冲电沉积的特点,将导通时间Ton分为形核沉积(+Ton/2)过程与晶粒长大(-Ton/2)过程,并进行了动力学分析。分析并经试验证明:Ton/Toff必须在一定的范围内协调成比例,脉冲导通时间Ton太大,容易造成浓差极化,导致晶粒的长大;脉冲关断时间Toff太大,造成非沉积时间过长,降低沉积效率;Ton和Toff越小,越有利于沉积层晶粒的细化,为一种新型的材料制造方法———脉冲电沉积提供了理论指导。
The mechanism and dynamics principle of pulse electrodeposition were systematically described.According to the feature of pulse electrodeposition,pulse-on time(Ton) was classified into nucleation process and growth process of grains.The two processes were analyzed based on dynamics.Results show that the Ton and pulse-off time(Toff) must be coordinated proportionally in appropriate range.Too long Ton led to concentration polarization and growth of grains;while too long Toff led to extended non-deposition duration and lowered deposition efficiency.Besides,short Ton and Toff were beneficial to the refining of grains.Relevant research results were helpful to theoretical guidance of pulse electrodeposition.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第6期18-21,3,共4页
Materials Protection
关键词
脉冲电沉积
机理
动力学
验证
pulse electrodeposition
mechanism
dynamics
verification