Microstructural characterization and hardness of electrodeposited nickel coatings from a sulphamate bath

被引：57

作者：

Banovic, SW ^{[1
]}

Barmak, K ^{[1
]}

Marder, AR ^{[1
]}

机构：

[1] Lehigh Univ, Bethlehem, PA 18015 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 1998年 / 33卷 / 03期

关键词：

Type Relationship; Pure Nickel; Nickel Coating; Pyramidal Structure; Nickel Plate;

D O I：

10.1023/A:1004321224586

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pure nickel plates were produced from a sulphamate bath by electrodeposition. A systematic variation of the current density, in the range 0.005 to 0.25 Acm(-2), resulted in a variation of the coating microstructure and properties. Deposits plated below a current density of 0.01 Acm(-2) had a surface morphology consisting of large, deep crevices surrounding smaller substructures. A banded or laminar type microstructure was observed in cross-section. Above this current density, truncated pyramidal structures, with ridged terraces oriented perpendicular to the growth direction, were found on the surface. The planar dimensions of the pyramidal surface features were found to increase with current density, as well as the columnar grain widths observed in the cross-sectional view. To evaluate the mechanical properties of the coatings, microindentation hardness tests were performed using a Knoop indenter. A Hall-Petch type relationship for the samples deposited at and above 0.01 Acm(-2) was seen. (C) 1998 Chapman & Hall.

引用

页码：639 / 645

页数：7

共 22 条

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