Interfacial studies of refractory glass-ceramic matrix/advanced SiC fiber-reinforced composites. Annual report, 1 Feb 91-1 Feb 92
The main objective of this program is to characterize the chemistry and structure of new advanced small diameter silicon based fibers and how these factors influence the nature of the fiber/matrix interface in refractory glass-ceramic matrix composites. It is the nature of this interface that then determines to a great degree the composite thermal, environmental, and mechanical properties. The fibers under investigation during the second year of this program included the new experimental polymer derived crystalline SiC fibers from Dow Corning Corp., the Si-N-C-O 'Black' fibers from Textron Specialty Materials, as well as the new low oxygen radiation cured Nicalon SiC type fibers from Nippon Carbon Co. Since the availability of all of these fibers was extremely limited, emphasis was placed on the mechanical, chemical, and microstructural characterization of the fibers through tensile testing, SEM of fiber fracture characteristics, scanning Auger depth profiling of fiber surfaces, and TEM of fiber thin sections, as well as their fracture behavior, bonding characteristics, and interfacial compatibility with various glass-ceramic matrix materials. Results of these analyses are discussed. Crystalline SiC fibers, Textron 'Black' fibers, low oxygen Nicalon fibers, SiC fiber/glass-ceramic matrix interfaces, TEM fiber analyses.
- Research Organization:
- United Technologies Research Center, East Hartford, CT (United States)
- OSTI ID:
- 7237779
- Report Number(s):
- AD-A-250784/6/XAB; UTRC/R--92-918246-4; CNN: F33615-89-C-5628
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
BONDING
CARBIDES
CARBON
CARBON COMPOUNDS
CHEMICAL PROPERTIES
CHEMISTRY
COMPATIBILITY
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
ELEMENTS
FABRICATION
FIBERS
GLASS
INTERFACES
JOINING
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
OXYGEN
POLYMERS
SEMIMETALS
SILICON
SILICON CARBIDES
SILICON COMPOUNDS
SURFACES