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Atomic oxygen effects on seal leakage
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Christensen, John R. Underwood, Steve D. Vaughn, Jason A. Kamenetzky, Rachel R. |
| Copyright Year | 1999 |
| Description | Common Berthing Mechanism (CBM provides the structural interface between separate International Space Station (ISS) elements, such as the Laboratory and Node modules. The CBM consists of an active and a passive half that join together with structural bolts. The seal at this interface is the CBM-to-CBM molded seal. The CBM-to-CBM interface is assembled on orbit, thus the seals can be exposed to the space environment for up to 65 hours. Atomic Oxygen/Vacuum Ultraviolet radiation (AO/VUV) in space is a potential hazard to the seals. Testing was conducted to determine the effect on leakage of the CBM-to-CBM seal material exposed to AO/VUV. The sealing materials were S383 silicone and V835 fluorocarbon material. Control samples, which were not exposed to the AO/VUV environment, were used to ensure that ff any changes in leakage occurred, they could be attributed to the AO/VUV exposure. After exposure to the AO/VUV environment the leakage increase was dramatic for the fluorocarbon. This testing was a major contributing factor in selecting silicone as the CBM-to-CBM seal material. |
| File Size | 519004 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990040481 |
| Archival Resource Key | ark:/13960/t78s9p019 |
| Language | English |
| Publisher Date | 1999-02-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Leakage Earth Orbital Environments Aerospace Environments O Ring Seals Fluorocarbons Sealing Ultraviolet Radiation International Space Station Vacuum Oxygen Atoms Nuclear Radiation Materials Tests Silicones Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
