Development of Pt-base two layered coating for oxidation protection

Yoshitaka Matsumura, Hideyuki Murakami, Kazuki Kasai, Hiromichi Murakami, Kazuhiko Noda

Research output: Contribution to journalArticle

Abstract

Oxidation resistance and microstructural changes of Pt/Ni + Al two layered coatings were investigated in comparison to those of Pt diffusion coatings. The two layered coatings were successfully prepared by a two-step electroplating process, which involves Pt electroplating followed by Ni + Al-particle composite electroplating. The cross-sectional observations of specimens after the cyclic oxidation test confirmed that the two-layered coatings retarded the formation of voids, suggesting that the top Ni + Al-particle composite layer played a role as the diffusion retarder between the coated layer and the substrate. In addition, the Ni + Al-particle composite coatings preferentially accelerated the formation of the Al2O3 scale on the surface. These results confirmed the beneficial effect of the designed two layered coatings.

Original languageEnglish
Pages (from-to)321-326
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume76
Issue number5
DOIs
Publication statusPublished - 2012 May 1
Externally publishedYes

Keywords

  • Nickel + aluminum-particle composite coatings
  • Nickel-based superalloy
  • Oxidation microstructural change

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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