Structural integrity testing of glass-ceramic/molybdenum vacuum tube frames

Technical Report · Tue Nov 25 04:00:00 EST 1980

DOI:https://doi.org/10.2172/6859249· OSTI ID:6859249

Spears, R. K.

In this study, vacuum tube subassemblies made of glass-ceramic insulators sealed to inner and outer molybdenum frames were loaded in compression to failure with a tensile test machine. Several factors were varied in processing these subassemblies. These factors included etching and nonetching of molybdenum piece parts, annealing and nonannealing of subassemblies, and vapor and non-vapor honing of insulators after sealing. After failure, the subassemblies were examined for fracture patterns. In most cases, fracture started at points near the lower portion of the inner sleeve-insulator interface. More load was carried by subassemblies having molybdenum piece parts that were acid etched. No difference appeared between the strength of subassemblies having annealed and nonannealed glass-ceramic insulators. Parts with vapor-honed insulators failed at substantially lower loads.

• Research Organization: General Electric Co., St. Petersburg, FL (USA). Neutron Devices Dept.
• DOE Contract Number: AC04-76DP00656
• OSTI ID: 6859249
• Report Number(s): GEPP-TIS-502
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
CERAMICS
COMPOSITE MATERIALS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRON TUBES
EQUIPMENT
FABRICATION
FRACTURE PROPERTIES
GLASS
HEAT TREATMENTS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
TENSILE PROPERTIES
TESTING