MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Structure of Deposits Obtained from Urea-Based Melt Bath Containing Co and La
Shingo ArakawaSatoshi OueHiroaki NakanoShigeo Kobayashi
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2012 Volume 53 Issue 4 Pages 770-772

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Abstract

Electrodeposition was performed in an unagitated solution from a urea-based melt bath containing Co and La under galvanostatic (10–40 mA·cm−2) and coulostatic (10 C·cm−2) conditions at 403 K, and the structure of the deposits was investigated. Co deposited in a metallic state at 10 mA·cm−2, whereas it was incorporated into deposits mainly as an oxide at high current densities of 30 and 40 mA·cm−2. La codeposited with Co as an oxide irrespective of current density. The content of La2O3 increased with current density. The deposits showed a granular crystal structure and became nonuniform crystals comprising large localized granules at high current densities.

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© 2012 The Japan Institute of Metals and Materials
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