The Ag-CuOx system is of interest to be used to be used as an air braze filler metal for joining high temperature electrochemical devices. Previous work has shown that the melting temperatures can be increased by adding palladium to Ag-CuOx and it is expected that this may aid high temperature stability. This work compares the room temperature bend strength of joints made between yttria-stabilized zirconia (YSZ) air brazed using Ag-CuOx without palladium and with 5 and 15mol% palladium additions. It has been found that in general palladium decreases joint strength, especially in low copper oxide compositions filler metals. At high copper oxide contents, brittle fracture through both copper oxide rich phases and the YSZ limits joint strength.
Revised: September 29, 2008 |
Published: September 8, 2008
Citation
Darsell J.T., and K.S. Weil. 2008.Effect of filler metal composition on the strength of yttria stabilized zirconia joints brazed with Pd-Ag-CuOx.Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science 39, no. 9:2095-2105.PNNL-SA-56438.doi:10.1007/s11661-008-9565-7