Anodic Electrodeposition of Nanocrystalline Coatings in the Mn−Co−O System
By Wei, Weifeng; Chen, Weixing & Ivey, Douglas G.
Published in Chemistry of Materials
NULL
2007
Abstract
Nanocrystalline coatings in the Mn-Co-O system have been anodically electrodeposited on ferritic stainless steel substrates from aqueous solutions. A range of Co/Mn compositions (20-65 atom % Co) can be deposited by adjusting the deposition parameters, i.e., solution temperature, metal ion concentration and current density. Electron microscopy analysis shows that the coatings are composed of numerous oxide grains (less than 10 nm in diameter), which have a metastable face center cubic (FCC) structure. The crystal structure of as-deposited coatings is not sensitive to deposition parameters. The effects of deposition parameters on coating morphology have also been investigated. Crack formation in Mn-Co-O coatings depends on process conditions, but is not related to phase structure, grain size, or even coating composition.
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