Brazing of zirconia with AgCuTi and SnAgTi active filler metals
Resource
Metallurgical and Materials Transactions A 31 (6): 1591-1597
Journal
Metallurgical and Materials Transactions A
Journal Volume
31
Journal Issue
6
Pages
1591-1597
Date Issued
2000
Date
2000
Author(s)
Chuang, T. H.
Yeh, M. S.
Chai, Y. H.
Abstract
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°C, respectively. The flexural strengths were 227 and 137 MPa for ZrO2/Ag27Cu3Ti/ZrO2 and ZrO2/Sn10Ag4Ti/ZrO2, respectively, after brazing at 900°C 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 ZrO2 ceramic is brazed with Ag27Cu3Ti and Sn10Ag4Ti filler metals. Interfacial analyses by electron probe microanalysis (EPMA) showed that such TiO reaction layers of ZrO2/Ag27Cu3Ti and ZrO2/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.
Other Subjects
Bending strength; Bonding; Contact angle; Filler metals; Interfaces (materials); Probes; Reaction kinetics; Silver alloys; Surface phenomena; Temperature; Wetting; Zirconia; Electron probe microanalysis; Interfacial reaction; Silver copper titanium alloys; Tin silver titanium alloys; Brazing
Type
journal article
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