Optimization of the mechanical properties of silicon carbide-fiber-reinforced zirconia titanate matrix composites through controlled processing
- Ceramics and Composites Branch, Naval Research Lab., Washington, DC (US)
This paper reports on the effects of processing parameters on the microstructure and mechanical behavior of a SiC-fiber-reinforced ZrTiO{sub 4} matrix composite were evaluated through a controlled study. The microstructure was analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Mechanical behavior was characterized by strength and toughness measurements, which were correlated with the microstructure of the composite. The optimized processing schedule developed included incorporation of CO-heat-treated BN-coated fibers, composite calcination at 530{degrees}C, and consolidation via hot-pressing at 1270{degrees}C and 17.25 MPa applied pressure in an atmosphere of CO at an overpressure of 111.5 kPa (1.1 atm). Use of this processing schedule improved in situ fiber strength and modified the fiber/matrix interfacial microstructure to ameliorate its sliding and debonding resistance, leading to a composite with average strength over 1 GPa and a toughness of 26 MPa {center dot}m{sup 1/2}.
- OSTI ID:
- 7305980
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 75:6; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON NITRIDES
COATINGS
MECHANICAL PROPERTIES
REINFORCED MATERIALS
SILICON CARBIDES
FIBERS
TITANIUM OXIDES
ZIRCONIUM OXIDES
CALCINATION
HOT PRESSING
INTERFACES
MATRIX MATERIALS
MICROSTRUCTURE
OPTIMIZATION
PROCESS CONTROL
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMIC PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CONTROL
CRYSTAL STRUCTURE
DECOMPOSITION
DIFFRACTION
ELECTRON MICROSCOPY
FABRICATION
MATERIALS
MATERIALS WORKING
MICROSCOPY
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
PRESSING
PYROLYSIS
SCATTERING
SILICON COMPOUNDS
TEMPERATURE RANGE
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360602* - Other Materials- Structure & Phase Studies
360603 - Materials- Properties
360606 - Other Materials- Physical Properties- (1992-)
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties