![Thickness of oxidic interfacial layers of reactive air brazed Crofer22APU-ZrO2- and ITM/LC-ZrO2-joints at 850°C in air Thickness of oxidic interfacial layers of reactive air brazed Crofer22APU-ZrO2- and ITM/LC-ZrO2-joints at 850°C in air](/en/departments/energy_systems/materials_and_components/joining_technology/brazes_for_sofc/jcr:content/contentPar/sectioncomponent/sectionParsys/textblockwithpics/imageComponent1/image.img.jpg/1565249443096/permeationsmembrandiagrtcm244-66627.jpg)
Thickness of oxidic interfacial layers of reactive air brazed Crofer22APU-ZrO2- and ITM/LC-ZrO2-joints at 850°C in air
![SEM-image of an oxidic interfacial layer of a Crofer22APU-ZrO2-joint after 800h at 850°C in air SEM-image of an oxidic interfacial layer of a Crofer22APU-ZrO2-joint after 800h at 850°C in air](/en/departments/energy_systems/materials_and_components/joining_technology/brazes_for_sofc/jcr:content/contentPar/sectioncomponent/sectionParsys/textblockwithpics/imageComponent2/image.img.jpg/1565249443096/permeation2-tcm244-66655.jpg)
SEM-image of an oxidic interfacial layer of a Crofer22APU-ZrO2-joint after 800h at 850°C in air
Silver based reactive air brazes are alternative sealing materials for glass-ceramic materials for high temperature applications which can be processed in oxidizing atmospheres. These brazes are a new development of the established active brazes (AgTi-, AgCuTi-Base) for ceramic-ceramic- and ceramic-metal-joints, which must be handled in vacuum or in protective atmospheres. In comparison to glass based seals metallic brazes show a much higher ductility and offer a higher stability of joint components again thermal cycles and mismatches of the thermal expansion coefficients.