Influence of Nano Al2O3 Particles on Morphology and Microstructure of Cu-Al2O3 Composite Coating by Jet Electrodeposition

Hui Fan; Man Liu; Yang Pei Zhao; Shan Kui Wang

doi:10.4028/www.scientific.net/KEM.764.164

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 764Influence of Nano Al2O3 Particles on Morphology...

Influence of Nano Al₂O₃ Particles on Morphology and Microstructure of Cu-Al₂O₃ Composite Coating by Jet Electrodeposition

Abstract:

Jet electrodeposition process is a very promising method in fabricating metal matrix composites reinforced with ceramic particles. In use of this method, insoluble particles suspended in an electrolytic bath are impinged onto and embedded in a growing metal layer. This paper is focused on the investigations of the copper matrix nanocomposite coatings with hard Al2O3 nanoparticles, electrochemically deposited from jet-circulated baths on 304 stainless steel substrate. The Cu-Al2O3 composite coating was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The effects of electrolyte jet velocity, current density, addition amount of Al2O3 in the electrolyte were analyzed on the microstructure change, surface morphology change as well as codeposited content of Al2O3 particles in the composite coating. It was found that increasing content of Al2O3 particles in electrolyte may improve composite coating surface morphology and increase the practical current density by exerting impingement effect on the cathode deposit surface, till excessive Al2O3 e.g.20g/L particles was added. Besides, appropriate amount of nanoparticles in the electrolyte also could offer grain refinement by providing nanocrystalline sized between 30~60 nm with current density in the range of 100~500 A/dm2.

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Key Engineering Materials (Volume 764)

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164-173

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https://doi.org/10.4028/www.scientific.net/KEM.764.164

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Online since:

February 2018

Authors:

Hui Fan*, Man Liu, Yang Pei Zhao, Shan Kui Wang

Keywords:

Composite Coating, Jet Electrodeposition, Microstructure, Morphology, Nanoparticles

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