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The self-brazing of partially stabilized zirconia using Ag27Cu3Ti and Sn10Ag4Ti active filler metals is investigated. It was shown that the contact angles of Ag27Cu3Ti and Sn10Ag4Ti on zirconia decreased with the increase of brazing temperature and remained constant at about 34 deg and 44 deg above 900 ЊC, respectively. The flexural strengths were 227 and 137 MPa for ZrO 2 /Ag27Cu3Ti/ ZrO 2 and ZrO 2 /Sn10Ag4Ti/ZrO 2 , respectively, after brazing at 900 ЊC for 10 minutes.In these brazing systems, the titanium in the filler metals segregated at the interface and formed a TiO reaction layer responsible for the wetting and bonding when a ZrO 2 ceramic is brazed with Ag27Cu3Ti and Sn10Ag4Ti filler metals. Interfacial analyses by electron probe microanalysis (EPMA) showed that such TiO reaction layers of ZrO 2 /Ag27Cu3Ti and ZrO 2 /Sn10Ag4Ti possessed similar thicknesses at the same brazing condition, implying that the TiO interfacial reaction layers of both brazing systems were of the same nature and formation kinetics.

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