Development of practical ceramic composite components
Approaches to welding cups and engine valves applications using composites of carbon-based matrices with and without fibers and ceramic coatings are illustrated. The metal inert gas (MIG) cup trials showed that a CVD Si3N4 coating on an appropriate substrate outperformed any monolithic material in minimizing splatter adherence and erosion. CVD gave a faceted crystalline polycrystalline Si3N4 and hence a fairly rough coating. For a roughly estimated CVD coating cost of 25 cents per cup, coated carbon-based cups would be far cheaper than monolithic Si3N4 cups, yet would perform better. A carbon-based fiber composite shows promising potential for valve applications. In contrast to Si3N4, it offers about one-third lower density for possible further performance improvement for gasoline engines and for reducing costs of valve springs. 2 refs.
- OSTI ID:
- 6112053
- Report Number(s):
- CONF-910162-; CODEN: CESPD
- Journal Information:
- Ceramic Engineering and Science Proceedings; (United States), Vol. 12; Conference: 15. annual conference on composites and advanced ceramics, Cocoa Beach, FL (United States), 13-16 Jan 1991; ISSN 0196-6219
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPOSITE MATERIALS
PERFORMANCE
CARBON
CERAMICS
CHEMICAL VAPOR DEPOSITION
COATINGS
COST
EROSION
FIBERS
INTERNAL COMBUSTION ENGINES
MATRIX MATERIALS
MECHANICAL PROPERTIES
PARTICULATES
SILICON CARBIDES
SILICON NITRIDES
USES
VALVES
CARBIDES
CARBON COMPOUNDS
CHEMICAL COATING
CONTROL EQUIPMENT
DEPOSITION
ELEMENTS
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
MATERIALS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
PARTICLES
PNICTIDES
SILICON COMPOUNDS
SURFACE COATING
360600* - Other Materials