Solid state sintering of silicon nitride ARL-CR-114. Final report
- Ceradyne, Inc., Costa Mesa, CA (United States)
This report describes the development of Si{sub 3}N{sub 4}material compositions in the Si{sub 3}N{sub 4}-Y{sub 2}O{sub 3}-SiO{sub 2}-Mo{sub 2}C system with good high temperature stress rupture properties which could be used in engine components. Two distinct processing routes were examined in the course of the program: SSN and SRBSN. SRBSN was chosen for material property optimization. After characterization of two optimized compositions in the above system, demonstration engine components (exhaust valve blanks) were manufactured using the established processing procedures. Dimensional tolerance capabilities of the process were established and material properties of the components were shown to be comparable to those established during material development.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Ceradyne, Inc., Costa Mesa, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 28361
- Report Number(s):
- ORNL/M-4021; ON: DE95007291; TRN: AHC29510%%166
- Resource Relation:
- Other Information: PBD: Sep 1994
- Country of Publication:
- United States
- Language:
- English
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33 ADVANCED PROPULSION SYSTEMS
SILICON NITRIDES
RESEARCH PROGRAMS
HEAT ENGINES
HEAT RESISTANT MATERIALS
PROGRESS REPORT
YTTRIUM OXIDES
SILICON OXIDES
MOLYBDENUM CARBIDES
CHEMICAL COMPOSITION
FABRICATION
HEAT TREATMENTS
MICROSTRUCTURE
MECHANICAL PROPERTIES
CORROSION RESISTANCE
EXPERIMENTAL DATA