Residual Stresses on Electro-Deposited NiCo-Al and NiCo-Zr Composite Coatings

Article PDF

Residual Stresses on Electro-Deposited NiCo-Al and NiCo-Zr Composite Coatings

F. Cai, C. Jiang, B. Pan

download PDF

Abstract: This experiment examined the residual stresses on electrodeposited NiCo-Al and NiCo-Zr composite coatings as well as the impact of varying Co2+concentrations on other properties of the coating, namely grain size and texture. To prepare for the experiments, this project employed modified Watt Baths containing NiSO4·6H2O (240 g/L), NiCl2·6H2O (40 g/L), H3BO3 (30 g/L) and C12H25NaSO4 (0.2 g/L) in order to electrically deposit them on to Aluminum and Zirconium and to produce the two types of aforementioned specimen: NiCo-Al and NiCO-Zr. The amount of Co in the end product is regulated via adjusting the concentration of CoSO4·7H2O, providing a range of concentrations from 5 to 40 g/L. Furthermore, structural analyses of the coatings were performed via X-ray diffraction at 40kV and 30mA in standard 2θ–θ mode. The Voigt method was used to calculate grain size and micro-strain of coatings using the integral breadth of the (200) peak. Residual stresses on the as-deposited composite coatings were measured by using stress analyzer and classical sin2ψ method. Peaks of (331)α of Ni were selected to calculate the residual stresses. Results show that, for both NiCo-Al and NiCo-Zr composite coatings, grain size decreases and micro-strain increases with increasing Co contents. Pole figure experiments shown typical fiber texture for composite coatings. Texture coefficient results show that the (111) texture coefficient increases while (111) texture coefficient decreases with increasing Co content. In addition, results show that the residual stress of NiCo-Al and NiCo-Zr composite coatings increases as Co content increases, which could be attributed to decreasing grain size and texture evolution from (200) texture to (111) texture.

Composite Coating, Electro-Deposition, Texture, Residual Stress

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: F. Cai, C. Jiang, B. Pan, ‘Residual Stresses on Electro-Deposited NiCo-Al and NiCo-Zr Composite Coatings’, Materials Research Proceedings, Vol. 2, pp 539-544, 2017


The article was published as article 91 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

[1] Meenu Srivastava, V. Ezhil Selvi, V.K. William Grips, K.S. Rajam, Corrosionresistance and microstructure of electrodeposited nickel-cobalt alloy coatings, Surf. Coat. Technol. 201 (2006) 3051-3060.
[2] L. Shi, C.F. Sun, P. Gao , F. Zhou, W.M. Liu, Electrodeposition and characterization of Ni-Co-carbon nanotubes composite coatings, Surf. Coat.Technol. 200 (2006) 4870-4875.
[3] B. Ranjith, G. Paruthimal Kalaignan, Ni-Co-TiO2 nanocomposite coating prepared by pulse and pulse reversal methods using acetate bath, Appl. Surf. Sci. 257 (2010) 42-47.
[4] Lei Shi, Chufeng Sun, Ping Gao, Feng Zhou, Weimin Liu, Mechanical properties and wear and corrosion resistance of electrodeposited Ni-Co/SiC nanocomposite coating, Appl. Surf. Sci. 252 (2006) 3591-3599.
[5] Meenu Srivastava, V.K. William Grips, K.S. Rajam, Electrodeposition of Ni-Co composites containing nano-CeO2 and their structure, properties, Appl. Surf. Sci. (2010) 717-722.
[6] Jianqiang Kang, Yifu Yang, Xi Jiang, Huixia Shao, Semiconducting properties of passive films formed on electroplated Ni and Ni-Co alloys. Corros. Sci. 50 (2008) 3576-3580.
[7] Meenu Srivastava, J.N. Balaraju, B. Ravisankar, C. Anandan, V.K. William Grips, High temperature oxidation and corrosion behaviour of Ni/Ni-Co-Al composite coatings, Appl. Surf. Sci. 263 (2012) 597-607.
[8] Meenu Srivastava, V.K. William Grips, K.S. Rajam, Electrochemical deposition and tribological behaviour of Ni and Ni-Co metal matrix composites with SiC nano-particles, Appl. Surf. Sci. 253 (2007) 3814-3824.
[9] Fei Cai, Chuanhai Jiang, Influences of Al particles on the microstructure and property ofelectrodeposited Ni–Al composite coatings, Appl. Surf. Sci. 292 (2014) 620-625.
[10] Fei Cai, Chuanhai Jiang, Xueyan Wu, X-ray diffraction characterization of electrodeposited Ni–Al composite coatings prepared at different current densities, J. Alloys Compd. 604 (2014) 292-297.
11] Th.H. De Keijser, J.I. Langford, E.J. Mittemeijer, A.B.P. Vogels, Use of the Voigt function in a single-line method for the analysis of X-ray diffraction line broadening. J. Appl. Cryst. 15 (1982) 308.
[12] P.J. Withers, H. Bhadeshia, Part 1 – Measurement techniques. Mater. Sci. Tech. 17 (2001) 355.
[13] C. Lupi, A. Dell’Era, M. Pasquali, P. Imperatori, Composition, morphology, structural aspects and electrochemical properties of Ni-Co alloy coatings, Surf. Coat. Technol. 205 (2011) 5394-5399.
[14] M. A. Meyers and K. K. Chawla, Mechanical Behavior of Materials P. 275, Prentice Hall, New Jersey, US, 1999.