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Cross-sectional oxide distribution of cast IN738 and its sputtered coating at 1000 °C

  • Shujiang Geng*
  • , Fuhui Wang
  • , Sam Zhang
  • *Corresponding author for this work
  • Nanyang Technological University
  • CAS - Institute of Metal Research

Research output: Contribution to journalArticlepeer-review

Abstract

A sputtered nanocrystalline coating of IN738 alloy was obtained by means of magnetron sputtering technique. The oxide distribution was presented of the cast IN738 and its coating after 50 h in air at 1000 °C. The results indicated that the oxide scale formed on the cast alloy consisted roughly of three sections: The top-most section being Cr2 O3 and TiO2 mixture, followed by internal aluminum oxide, and scattering beneath which being TiN particles. In the case of nanocrystalline coating, however, only two sections were obvious: The top Cr2 O3, TiO2 and NiCr2 O4 spinel mixture layer and the inner continuous Al2 O3 layer. No internal oxidation and nitridation occurred.

Original languageEnglish
Pages (from-to)161-164
Number of pages4
JournalSurface and Coatings Technology
Volume167
Issue number2-3
DOIs
StatePublished - 22 Apr 2003
Externally publishedYes

Keywords

  • IN738 alloy
  • Nanocrystalline coating
  • Oxidation
  • Sputtering

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