Loading...
Please wait, while we are loading the content...
Similar Documents
Annealing effects on creep and rupture of polycrystalline alumina-based fibers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Morscher, G. N. Goldsby, J. C. DiCarlo, J. A. Yun, H. M. |
| Copyright Year | 1998 |
| Description | Continuous-length polycrystalline aluminum-oxide-based fibers are being considered as reinforcements for advanced high-temperature composite materials. For these fine-grained fibers, basic issues arise concerning grain growth and microstructural instability during composite fabrication and the resulting effects on the fiber's thermo-mechanical properties. To examine these issues, commercially available Nextel 610 (alumina) and Altex (alumina-silica) fibers were annealed at 1100 and 1300 C for up to 100 hr in air. Changes in fiber microstructure, fiber tensile creep, stress rupture, and bend stress relaxation (BSR) that occurred with annealing were then determined. BSR tests were also used to compare as-received and annealed fibers to other polycrystalline oxide fibers. Annealing was shown to have a significant effect, particularly on the Altex fiber, and caused it to have increased creep resistance. |
| File Size | 741886 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990021540 |
| Archival Resource Key | ark:/13960/t9q28vc6p |
| Language | English |
| Publisher Date | 1998-12-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Annealing Stress Relaxation Ceramic Fibers Reinforcing Fibers Fiber Composites Polycrystals Rupturing Creep Strength Microstructure Tensile Creep Aluminum Oxides Silicon Dioxide Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
