PNNL

Abstract

Ceramic joining is becoming increasingly more important as the demand for high temperature structural ceramic components for gas turbines, combustion engines, heat exchanger, and burners increases. The primary challenge in developing a useful ceramic joining technique is not necessarily in producing the joint, but in forming a joint interface which maintains its strength at high temperature under a harsh oxidizing environment. Previous work has shown that commercially available brazes do not exhibit the level of oxidation resistance required for high temperature air application. However, results obtained with a series of silver-copper oxide compositions appear to be quite promising, displaying excellent braze wettability and room temperatures joint strength.