Influence of mode of electrodeposition, current density and saccharin on the microstructure and hardness of electrodeposited nanocrystalline nickel coatings

被引：118

作者：

Wasekar, Nitin P. ^{[1
]}

Haridoss, Prathap ^{[2
]}

Seshadri, S. K. ^{[2
]}

Sundararajan, G. ^{[1
,2
]}

机构：

[1] Int Adv Res Ctr Powder Met & New Mat, Hyderabad 500005, Andhra Pradesh, India

[2] IITM, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

SURFACE & COATINGS TECHNOLOGY | 2016年 / 291卷

关键词：

Electrodeposition; Nickel; Sulfur; Grain size; Hardness; Texture; GRAIN-SIZE; PULSE; SULFUR; ELECTROCRYSTALLIZATION; SURFACE; GROWTH; CHARGE; DC;

D O I：

10.1016/j.surfcoat.2016.02.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The main purpose of the present work is to study the influence of current density, deposition mode and the presence of saccharin as an additive on the microstructure, sulfur content, grain size and microhardness of nanocrystalline Ni coatings. Towards this purpose, nanocrystalline nickel (Ni) coatings were deposited at various current densities in Watt's bath using direct, pulse and pulse reverse current (PRC) electrodeposition and subsequently characterized for sulfur content, grain size and hardness. It was observed that, the current density has no influence on the grain size/hardness of nanocrystalline Ni coatings in direct and pulsed current electrodeposition mode. However, the grain size increased from similar to 20 to similar to 200 nm with decrease in current density in PRC mode of deposition. In addition a substantial change in microstructure and texture of PRC Ni coatings was also evident. The experimental results have been rationalized based on the adsorption-desorption type of mechanism during electrodeposition. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：130 / 140

页数：11

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