Process dependence of Ir-based bond coatings

Hideyuki Murakami, Tetsuro Yano, Satoshi Sodeoka

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The process dependence of Ir-based-alloy-coated Ni-based single crystal superalloys was investigated. An Ir-4 at%Ta alloy, 10 μm thick, was coated on a Ni-based single crystal superalloy TMS-82+, by means of magnetron sputtering deposition (SD) and electron beam physical vapor deposition (EB-PVD). X-ray analysis revealed that the grain size of the as-SD-coated layer (∼20 nm) has five times smaller than that of the as-EB-PVD coated layer (∼100nm), and the SD-coated specimens showed more rapid outer diffusion of Ni and Al from the substrate after annealing, than the EB-PVD-coated ones. On the other hand, the aluminizing treatment reduces the differences between the SD coated and EB-PVD coated specimens in terms of compositional distribution and oxidation resistance. This study also revealed that even without aluminizing, the simple annealing treatment enhances the oxidation resistance of the Ir-4%Ta-coated TMS-82+.

Original languageEnglish
Pages (from-to)2886-2890
Number of pages5
JournalMaterials Transactions
Volume45
Issue number9
DOIs
Publication statusPublished - 2004 Jan 1
Externally publishedYes

Fingerprint

Physical vapor deposition
Electron beams
vapor deposition
electron beams
aluminum coatings
Sputtering
coatings
Coatings
oxidation resistance
sputtering
Oxidation resistance
heat resistant alloys
Superalloys
Single crystals
Annealing
annealing
single crystals
X ray analysis
Magnetron sputtering
magnetron sputtering

Keywords

  • Bond-coat
  • Electron beam physical vapor deposition
  • Iridium-based alloy
  • Nickel-based superalloy
  • Oxidation resistance
  • Sputtering

ASJC Scopus subject areas

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

Cite this

Process dependence of Ir-based bond coatings. / Murakami, Hideyuki; Yano, Tetsuro; Sodeoka, Satoshi.

In: Materials Transactions, Vol. 45, No. 9, 01.01.2004, p. 2886-2890.

Research output: Contribution to journalArticle

Murakami, Hideyuki ; Yano, Tetsuro ; Sodeoka, Satoshi. / Process dependence of Ir-based bond coatings. In: Materials Transactions. 2004 ; Vol. 45, No. 9. pp. 2886-2890.
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