Cyclic Oxidation Behavior of Iridium-Modified Aluminide Coatings for Nickel-Base Single Crystal Superalloy TMS-75

Feng Wu, Hideyuki Murakami, Hiroshi Harada

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The oxidation behavior of iridium-modified aluminide (Ir-Al) coating obtained by a two-step process was investigated. A pure Ir layer was first electrodeposited on the nickel-base single crystal superalloy TMS-75, and then the Ir-coated TMS-75 was treated by a conventional low activity pack-cementation aluminizing process. The oxidation resistance of the Ir-Al coated TMS-75 and the simply aluminized TMS-75 was evaluated by a cyclic oxidation test at 1373 K in air. The results showed that the Ir-Al coated TMS-75 had better thermal cyclic oxidation resistance than the simply aluminized TMS-75. The existence of Ir in the Ir-Al coatings may promote the formation of dense and adherent Al2O3 scale and thus retard the degradation of β-(Ir, Ni)Al phase during oxidation process.

Original languageEnglish
Pages (from-to)1675-1678
Number of pages4
JournalMaterials Transactions
Volume44
Issue number9
DOIs
Publication statusPublished - 2003 Sep
Externally publishedYes

Keywords

  • Electrodeposition
  • Iridium-modified coating
  • Low activity aluminium-pack cementation process
  • Nickel-base superalloy

ASJC Scopus subject areas

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

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