Effect of filler metal composition on the strength of yttria stabilized zirconia joints brazed with Pd-Ag-CuOx

Journal Article · Mon Sep 08 00:00:00 EDT 2008 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, 39(9):2095-2105

DOI:https://doi.org/10.1007/s11661-008-9565-7· OSTI ID:939009

Darsell, Jens T; Weil, K Scott

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.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 939009
• Report Number(s): PNNL-SA-56438; MMTAEB; AA1510100; TRN: US200820%%444
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, 39(9):2095-2105, Vol. 39, Issue 9; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
COPPER OXIDES
FILLER METALS
FRACTURES
MELTING
PALLADIUM
PALLADIUM ADDITIONS
STABILITY
air brazing
yttria stabilized zirconia
palladium
HIGH-TEMPERATURE
COPPER OXIDE
SYSTEM
ADDITIONS
BEHAVIOR
ALLOYS