A new ceramic brazing technique, referred to as reactive air brazing (RAB), has recently been developed for potential applications in high temperature devices such as gas concentrators, solid oxide fuel cells, gas turbines, and combustion engines. At present, the technique utilizing a silver-copper oxide system is of great interest. The maximum operating temperature of this system, however, is limited by its eutectic temperature of ~935°C, although in practice the operating temperature should be limited to be even lower. An obvious strategy that can be employed to increase the maximum operating temperature of the braze material is to add a higher melting noble alloying element. In this paper, we report the effects of palladium addition on the thermodynamics of the Ag-CuO system and on the wetting properties of the resulting braze with respect to alumina
Revised: January 3, 2011 |
Published: May 1, 2004
Citation
Darsell J.T., J.S. Hardy, J.Y. Kim, and K.S. Weil. 2004.Microstructure, Melting and Wetting Properties of Pd-Ag-CuO Air Braze on Alumina. In Surfaces, Interfaces and Science of Ceramic Joining: Proceedings of the 106th Annual Meeting of The American Ceramic Society, Indianapolis, Indiana, USA 2004, Ceramic Transactions, edited by KS Weil, IE Reimanis and CA Lewinshohn, 158, 173-182. Westerville, Ohio:American Ceramic Society.PNNL-SA-41213.