High temperature behaviour of silicon carbide and aluminium oxide ceramics in coal and residual-oil slags

Journal Article · Sun Nov 01 04:00:00 EST 1981 · Ceram. Eng. Sci. Proc.; (United States)

DOI:https://doi.org/10.1002/9780470291115.ch8· OSTI ID:6458496

Tennery, V J; Wei, G C; Ferber, M K

Ceramic tubes made of aluminium oxide, sialon, and several commercial silicon carbides were exposed for about 500 h at 1200 to 1220 C to the combustion products from either No. 6 fuel oil or a mixture of 10% bituminous coal in No. 6 fuel oil (COM). After exposure to combustion products from No. 6 fuel oil, the linear thermal expansion at 1000 C for sintered ..gamma..chemically bond-SiC was 17% greater than it was before the experiment. For CVD SiC and siliconized SiC, there was no change. For alumina, it decreased by about 30%. When exposed to COM combustion products, the thermal expansion of the ..gamma..chemically bond-SiC increased slightly, and that of siliconized KT SiC increased by about 16% at 1000 C. Significant thermal expansion differences were observed between the upstream and downstream sides of the tubes for sintered ..gamma..chemically bond-SiC, the KT SiC, and the alumina. The strength after exposure for ..cap alpha..-SiC decreased by about 4%; the others remained unchanged. The helium permeability increased after exposure. The greatest increase occurred for tubes exposed only to residual fuel oil. 6 references.

• OSTI ID: 6458496
• Journal Information: Ceram. Eng. Sci. Proc.; (United States), Journal Name: Ceram. Eng. Sci. Proc.; (United States) Vol. 2:11/12; ISSN CESPD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
02 PETROLEUM
025000 -- Petroleum-- Combustion
36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
CORROSIVE EFFECTS
DISPERSIONS
ELEMENTS
ENERGY SOURCES
EXPANSION
FLUIDS
FOSSIL FUELS
FRACTURE PROPERTIES
FUEL OILS
FUEL SLURRIES
FUELS
GASES
HELIUM
LIQUID FUELS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MIXTURES
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM PRODUCTS
RARE GASES
SILICON CARBIDES
SILICON COMPOUNDS
SLAGS
SLURRIES
SUSPENSIONS
TEMPERATURE EFFECTS
TESTING
THERMAL EXPANSION
THERMOCHEMICAL PROCESSES
TUBES
VERY HIGH TEMPERATURE