Evaluation of pullout cable EMR hardware design and potting methods
A continuing problem of undesirable voids in epoxy potting of pullout cable electromagnetic radiation (EMR) shields exists. Three new EMR shields with smooth inner contours were developed to minimize void formation caused by air entrapment near sharp corners. Prototype cable assemblies were fabricated with the new shields. The prototypes were filled with both aluminum oxide (Al/sub 2/O/sub 3/) and beta eucryptite (Beta U) filled epoxies using single- and two-stage potting methods. Results demonstrate that the new shields are effective but that the major cause of voids is due to the shrinkage of epoxy during cure. The shrinkage problem (3 percent by volume) is overcome by careful two-stage potting into shields designed so that the volume for the second stage potting is extremely small.
- Research Organization:
- Sandia Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 5547071
- Report Number(s):
- SAND-79-0211
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Instruments
or Electronic Systems
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CABLES
COAXIAL CABLES
CONDUCTOR DEVICES
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EPOXIDES
EQUIPMENT
FABRICATION
MATERIALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POTTING MATERIALS
RADIATIONS
SHIELDS
VOIDS