Process improvement for Si/sub 3/N/sub 4/ for heat engine applications
Conference
·
· Ceram. Eng. Sci. Proc.; (United States)
OSTI ID:6229713
A statistically designed processing experiment was performed to identify and optimize critical processing parameters and compositions for sintered Si/sub 3/N/sub 4/. Process improvements which were monitored by strength testing and microstructural characterization resulted in improvements of 20 percent and 85 percent in Wiebull modulus. A newly developed composition achieved a flexural strength of 578.8 MPa at 1399 C. A SiC-whisker toughened composite using this material as a matrix achieved a room temperature fracture toughness of 6.93 MPa sq rt m.
- OSTI ID:
- 6229713
- Report Number(s):
- CONF-880118-
- Conference Information:
- Journal Name: Ceram. Eng. Sci. Proc.; (United States) Journal Volume: 9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
ENGINES
FLEXURAL STRENGTH
HIGH TEMPERATURE
MECHANICAL PROPERTIES
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
OPTIMIZATION
PNICTIDES
PROCESSING
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
THERMODYNAMIC CYCLES
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
ENGINES
FLEXURAL STRENGTH
HIGH TEMPERATURE
MECHANICAL PROPERTIES
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
OPTIMIZATION
PNICTIDES
PROCESSING
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
THERMODYNAMIC CYCLES