Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy

Yingna Wu*, Aya Suzuki, Hideyuki Murakami, Seiji Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


As a high temperature protective layer, platinum-iridium alloys were electroplated on the nickel-base single crystal superalloy TMS-82+ from amidosulfuric acid solutions by the direct current method. It was found that Ir content in the films was always lower than the ratio of concentration ([Ir 3+]/([PtCl62-] + [Ir3+])) in the electrolytes, indicating that preferential deposition of Pt occurred in this study. The asdeposited Pt-Ir films formed an fee single phase structure with a granular surface. When Ir content exceeded 3 at%, Pt-Ir films exhibited the 〈111〉 preferred growth orientation. It was also found that pre-deposition of Ni and Pt promoted the deposition rate and changed composition of overlaying Pt-Ir films.

Original languageEnglish
Pages (from-to)2176-2179
Number of pages4
JournalMaterials Transactions
Issue number10
Publication statusPublished - 2005 Oct
Externally publishedYes


  • Direct current method
  • Electroplating
  • Ni-base superalloy
  • Platinum-iridium films
  • Pre-deposition

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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