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Degradation of teflon(trademark) fep following charged particle radiation and rapid thermal cycling
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ayres-Treusdell, Mary Munoz, Bruno Townsend, Jacqueline Powers Sr., Charles Viens, Michael |
| Copyright Year | 1999 |
| Description | During the Second Servicing Mission (SM2) of the Hubble Space Telescope (HST) severe degradation was observed on the outer layer of the thermal control blankets. Astronaut observations and photographs revealed large cracks in the metallized Teflon(trademark) FEP (fluorinated ethylene propylene), the outer layer of the multi-layer insulation (MLI), in many locations around the telescope. In an effort to understand what elements of the space environment might cause such damage, pristine Teflon(trademark) FEP was tested for durability to radiation and thermal cycling. Specimens were subjected to electron and proton fluences comparable to those experienced by HST and were subsequently thermal cycled in a custom-built rapid thermal cycle chamber. Tensile tests of the specimens showed that radiation followed by thermal cycling significantly reduced the ultimate strength and elongation of Teflon(trademark) FEP. |
| File Size | 471862 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990040485 |
| Archival Resource Key | ark:/13960/t3cz8558w |
| Language | English |
| Publisher Date | 1999-02-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Protons Kapton Trademark Cracks Aerospace Environments Tensile Tests Hubble Space Telescope Thermal Cycling Tests Plastic Deformation Multilayer Insulation Electrons Teflon Trademark Crack Propagation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
