Compact Coating of Tantalum on Tungsten Prepared by Molten Salt Electrodeposition

Mazhar Mehmood, Nobuaki Kawaguchi, Hideki Maekawa, Yuzuru Sato, Tsutomu Yamamura, Masayoshi Kawai, Kenji Kikuchi, Michihiro Furusaka

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Attempts to prepare tantalum coating on tungsten have been performed in 55 mol%LiF-35 mol%NaF-10 mol%CaF2 melt containing K2TaF 7. Electrolytic deposition of tantalum was carried out by galvanostatic polarization. A conproportionation reaction also occurred that interfered with the electrodeposition and resulted in decrease in current efficiency. However, the product of this reaction was soluble, which diffused away from the electrode without contaminating the deposit. Hence, a compact electrodeposited tantalum coating was obtained on tungsten substrate. An excellent interface was possible when coating was performed in the melt containing 2 mol% K2TaF7.

Original languageEnglish
Pages (from-to)1659-1662
Number of pages4
JournalMaterials Transactions
Volume44
Issue number9
DOIs
Publication statusPublished - 2003 Sep

Keywords

  • Coating
  • Electrodeposition
  • Fluoride
  • Interface
  • Molten salt
  • Tantalum
  • Tungsten
  • Voltammetry and chronopotentiometry

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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