Chemistry of Glass-Ceramic/Metal Bonding for Header Applications. I. Effect of Treatments on Inconel 718 and Hastelloy C-276 Metallic Surfaces

摘要

Glass-ceramic headers usually consist of a high-tensile-strength shell, one or several metal rings and/or pins which act as electrical feedthroughs, and a glass-ceramic electrical insulator. In recent headers, the glass-ceramic to metal seals have been fabricated using a lithia-alumina-silica glass and either Inconel 718 or Hastelloy C-276 as the metal piece parts. Auger electron spectroscopy was employed to study the change in surface chemistry on metal surfaces caused by the different manufacturing processes. (ERA citation 08:010242)