Formation of omega and Ti sub(2)Ni phases in a residual Ti-Ni-Ti multilayer between stainless steel and zirconia after bonding at 1173 K

Stainless steel (316L) and 8 mol pct Y sub(2)O sub(3)-stabilized zirconia (8Y-ZrO sub(2)) were bonded using a Ti-Ni-Ti multilayer at 1173 K (900 degree C) for 1 h. Cross-sectional transmission electron microscopy specimens were prepared by an innovative focused ion beam plus lift-out technique. In a...

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Bibliographic Details
Published in:Philosophical magazine letters 2014-10, Vol.94 (10), p.609-619
Main Authors: Wei, Shen-Hung, Lin, Chien-Cheng
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Foils
Heat resistant steels
Multilayers
Nickel
Precipitation
Stainless steels
Titanium
Zirconium dioxide
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Summary:Stainless steel (316L) and 8 mol pct Y sub(2)O sub(3)-stabilized zirconia (8Y-ZrO sub(2)) were bonded using a Ti-Ni-Ti multilayer at 1173 K (900 degree 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 alpha -Ti, the dissolution of Fe, Cr, and Ni diffusing outwards from 316L into beta -Ti led to the precipitation of the omega ( omega ) phase with different variants in the residual Ti foil between 316L and Ni. The omega -phase was not found in the residual Ti foil between Ni and 8Y-ZrO sub(2), while Ti sub(2)Ni precipitates were precipitated in some alpha -Ti grains owing to the exclusion of Ni from the beta -Ti.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500839.2014.951705