Electrodeposition of Pt-Ir alloys on nickel-base single crystal superalloy TMS-75

Feng Wu, Hideyuki Murakami, Yoko Yamabe-Mitarai, Hiroshi Harada, Hideki Katayama, Yoshinobu Yamamoto

研究成果: Article査読

35 被引用数 (Scopus)


Platinum-iridium alloy coatings from amidosulfuric acid solutions have successfully been electrodeposited on nickel-base single crystal superalloy TMS-75 by direct current method. The effects of electrolyte temperature, current density and mole concentration ratios of [Ir3+]/([PtCl62-]+ [Ir3+]), on the deposition rate, composition and crystallographic structures of Pt-Ir alloy coatings are investigated. It is found that with increasing electrolyte temperature, deposition rate and Ir content increase, whereas the grain size of Pt-Ir alloy coatings decreases. Smooth and dense Pt-Ir alloy coatings can be obtained at 1 A/dm2 and 353 K. Pt-Ir alloy coatings with expected compositions can be readily fabricated by controlling the mole concentration ratios of [Ir3+]/([PtCl62-] +[Ir3+]) in the electrolyte. A detailed investigation of the structure and morphology of electrodeposited Pt-Ir alloy coatings is also presented. XRD analysis revealed that all the coated Pt-Ir alloys have a single phase with f.c.c structure, and the lattice parameters of the coatings decrease linearly with increasing Ir content, suggesting that the coated Pt-Ir alloy system follows the Vegard's law.

ジャーナルSurface and Coatings Technology
出版ステータスPublished - 2004 6月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学


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