Evolution of the interlayer microstructure and the fracture modes of the zirconia/Cu–Ag–Ti filler/Ti active brazing joints

Zirconia (3Y-PSZ) and titanium were joined by active brazing in vacuum with the 63 Ag–35.25 Cu–1.75 Ti (wt.%) filler at 840–870 °C under different contact loads. Brazing conditions did not affect noticeably the joint mechanical strength but a remarkable change of the interlayer microstructure was fo...

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Bibliographic Details
Published in:Materials letters 2007, Vol.61 (2), p.613-616
Main Authors: Smorygo, O., Kim, J.S., Kim, M.D., Eom, T.G.
Format: Article
Language:English
Subjects:
Brazing
Ceramics
Interface
Metals and alloys
Microstructure
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Summary:Zirconia (3Y-PSZ) and titanium were joined by active brazing in vacuum with the 63 Ag–35.25 Cu–1.75 Ti (wt.%) filler at 840–870 °C under different contact loads. Brazing conditions did not affect noticeably the joint mechanical strength but a remarkable change of the interlayer microstructure was found. This microstructure evolution affected the fracture behavior: ductile fracture through the Ag-rich area changed to a brittle one through the intermetallic area in the titanium–filler interface after brazing with long soaking at maximum temperature.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2006.05.024