Burner rig hot corrosion of silicon carbide and silicon nitride

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06510.x· OSTI ID:7057540

Fox, D S; Smialek, J L ^[1]

---

1. National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center (USA)

A number of commercially available SiC and Si{sub 3}N{sub 4} materials were exposed to 1000{degrees}C for 40 h in a high-velocity, pressurized burner rig as a simulation of an aircraft turbine environment. Na impurities (2 ppm) added to the burner flame resulted in molten Na{sub 2}SO{sub 4} deposition, attack of the SiC and Si{sub 3}N{sub 4}, and formation of substantial Na{sub 2}O {center dot} {ital x}(SiO{sub 2}) corrosion product. Room-temperature strength of the materials decreased as a result of the formation of corrosion pits in SiC and grain-boundary dissolution and pitting in Si{sub 3}N{sub 4}.

• OSTI ID: 7057540
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:2; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103 -- Internal Combustion Engines-- Turbine
36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AIRCRAFT
ALKALI METAL COMPOUNDS
BURNERS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
CORROSION
CORROSIVE EFFECTS
ENGINES
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATERIALS TESTING
NITRIDES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PITTING CORROSION
PNICTIDES
PRESSURE EFFECTS
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SIMULATION
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
TESTING
VERY LOW TEMPERATURE