Structural Evolution and Internal Stress of Nickel-Phosphorus Electrodeposits
Resource
Journal of the Electrochemical Society 152 (6): C370-C375
Journal
Journal of the Electrochemical Society
Journal Volume
152
Journal Issue
6
Pages
-
Date Issued
2005
Date
2005
Author(s)
Lin, C. S.
Lee, C. Y.
Chen, F. J.
Li, W. C.
Abstract
The properties of nickel-phosphorus (Ni-P) electrodeposits can be best related to their phosphorus content and microstructure. This study systematically investigated the microstructural evolution and mechanical properties of the deposits plated from nickel sulfamate baths containing 0-40 g dm-3 phosphorous acid (H3PO3). Experimental results indicate that coarse nickel grains were substantially refined with the incorporation of phosphorus into the deposit. For example, as the deposit phosphorus content was increased from 0 to 14 wt %, the structure of the deposit changed in sequence from a coarse column to a mixture of column and lamella, followed by a well-defined lamella, and finally to a homogeneous amorphous matrix dispersed with nanosized grains. Accompanied with this structural evolution, the deposit exhibited a distinct change in deposit hardness and internal stress. These properties and microstructure relationships are discussed in terms of the lattice defects in the grains and proton discharge during electroplating. © 2005 The Electrochemical Society. All rights reserved.
SDGs
Other Subjects
Amorphous materials; Binary mixtures; Coatings; Electrochemical electrodes; Electrochemistry; Hardness; Microstructure; Nickel compounds; Optical microscopy; Stresses; X ray diffraction analysis; Electrodeposits; Internal stress; Phosphorus contents; Structural evolution; Electrodeposition
Type
journal article
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