Influence of ultrasonic agitation on Co-γ-Al₂O₃ nano-electrocomposite coating

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TypeArticle
Journal titleElectrochimica Acta
Pages# of pages: 27
SubjectElectrocomposite coating; nanocomposite; ultrasonic agitation; zeta potential; turbidimetry; hardness; cobalt electroplating; alumina
AbstractIncorporation of a cationic surfactant, cetyltrimethylammonium chloride (CTAC), and use of ultrasonic agitation during electroplating of Co-γ-Al₂O₃ composite coatings resulted in high particle inclusion percentrage with embedded alumina clusters being 2.5 to 3.0 times smaller than those obtained with conventional plating or when ultrasonic agitation was used only before plating. Alumina particles with high zeta potentials were obtained when CTAC was added to the plating bath and resulted in particles inclusion percentages 10 to 20 times higher than when a surfactant-free electrolyte was used. Ultrasonic agitation during electrodeposition acted as an effective alumina cluster refiner. Although ultrasonic agitation resulted in better particle dispersion for the Co-γ-Al₂O₃ system, no real improvement in terms of hardness was observed compared to the same system plated without ultrasounds. Nonetheless, the positive dual effect of cationic surfactant addition and ultrasonic agitation was clearly demonstrated and can be applied to other types of electrocomposite both compositions and therefore to other types of coating applications.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48858
NPARC number15877988
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Record identifierd9772e02-4cbe-4b43-be8c-56c78bc69748
Record created2010-07-30
Record modified2016-05-09
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