Formation of omega and Ti2Ni phases in a residual Ti-Ni-Ti multilayer between stainless steel and zirconia after bonding at 1173 K

Shen Hung Wei, Chien-Cheng Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Stainless steel (316L) and 8 mol pct Y2O3-stabilized zirconia (8Y-ZrO2) were bonded using a Ti-Ni-Ti multilayer at 1173 K (900 °C) for 1 h. Cross-sectional transmission electron microscopy specimens were prepared by an innovative focused ion beam plus lift-out technique. In addition to acicular α-Ti, the dissolution of Fe, Cr, and Ni diffusing outwards from 316L into β-Ti led to the precipitation of the omega (ω) phase with different variants in the residual Ti foil between 316L and Ni. The ω-phase was not found in the residual Ti foil between Ni and 8Y-ZrO2, while Ti2Ni precipitates were precipitated in some α-Ti grains owing to the exclusion of Ni from the β-Ti.

Original languageEnglish
Pages (from-to)609-619
Number of pages11
JournalPhilosophical Magazine Letters
Volume94
Issue number10
DOIs
StatePublished - 3 Oct 2014

Keywords

  • bonding
  • interfaces
  • omega phase
  • stainless steels
  • titanium
  • transmission electron microscopy

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