Emerging continuous SiC fibers for high-temperature applications
Journal Article
·
· Ceramics International
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Free Form Fibers, Saratoga Springs, NY (United States)
Silicon carbide (SiC) fibers are responsible for the ultimate strength and toughness of SiC-fiber reinforced composites in harsh environments. The development of a new generation of continuous SiC fibers continues to advance the mechanical properties of composite materials. Tyranno™ SA4 fiber was recently released as a successor of Tyranno™ SA3 fiber. Laser-driven chemical vapor deposition (LCVD) has been adopted as an alternative fiber processing route to synthesizing high-strength SiC fiber with tailorable small diameters and chemical compositions. Both Tyranno™ SA4 and laser-driven CVD fibers show very high tensile strength, about 4 GPa in the as-fabricated condition. The degradation of thermal stability and strength due to annealing in an inert environment were similar for Tyranno™ SA3 and SA4 fibers because of their similar carbon-rich, crystalline microstructure. Silicon-rich fibers produced by LCVD possessed heterogeneous crystallinity, which was attributed to laser power distribution and showed microstructural instability at 1500 °C and above. Finally, the new SiC fibers demonstrated an increase in as-fabricated strength but faced the same challenges in environmental resistance as the traditional SiC fibers do.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 2428069
- Journal Information:
- Ceramics International, Journal Name: Ceramics International Journal Issue: 18 Vol. 50; ISSN 0272-8842
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties of SiC composites neutron irradiated under light water reactor relevant temperature and dose conditions
Hydrothermal corrosion of laser printed SiC fibers under extreme environment
Interfacial studies of refractory glass-ceramic matrix/advanced SiC fiber-reinforced composites. Annual report, 1 Feb 90-1 Feb 91
Journal Article
·
Mon Jul 03 20:00:00 EDT 2017
· Journal of Nuclear Materials
·
OSTI ID:1376450
Hydrothermal corrosion of laser printed SiC fibers under extreme environment
Journal Article
·
Tue Jan 26 19:00:00 EST 2021
· Journal of Nuclear Materials
·
OSTI ID:1853406
Interfacial studies of refractory glass-ceramic matrix/advanced SiC fiber-reinforced composites. Annual report, 1 Feb 90-1 Feb 91
Technical Report
·
Tue Apr 30 00:00:00 EDT 1991
·
OSTI ID:5170843