Abstract
This paper describes a new process to synthesize crystalline oxide fibers for high temperature structural applications. Strong and chemically homogeneous precursor fibers of 5-40 μm diameter were made at rates of up to 1.6 m s-1 by glass fiber pulling techniques from undercooled molten oxides. The precursor fibers were heat treated at temperatures up to 1873 K to make crystalline fibers with controlled grain size and properties. Tensile strengths of the precursor fibers were up to 5-6 G Pa (900 ksi) for YAG- (Y3Al5O12) and mullite- (Al6Si2O13) compositions. Research to optimize fiber compositions and crystallization processes, and to scale up precursor fiber production is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 2543-2550 |
| Number of pages | 8 |
| Journal | Journal of the European Ceramic Society |
| Volume | 19 |
| Issue number | 13-14 |
| DOIs | |
| State | Published - Oct 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1998 New Developments in High Temperature Materials - Istanbul, Turkey Duration: Aug 12 1998 → Aug 15 1998 |
Funding
This research was supported by the US Air Force Office of Scientific Research under an STTR and the US National Science Foundation. Work at University of Illinois at Urbana-Champaign (UIUC) was also supported by the AASERT Program. TEM was performed at the Center for Microanalysis of Materials in the Materials Research Laboratory at the UIUC. Earlier experiments on undercooled melts were supported by NASA. SEM photographs of rapidly crystallized fibers were taken by B.C. as part of his senior year project in Materials Science at Northwestern University under the direction of Professor Vinayak Dravid. We thank Mr William Jellison for assistance in the research.
Keywords
- Fibers
- Glass fibers
- Mullite
- Strength
- YAG