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Burner Rig Corrosion of SiC at 1000°C
Author(s) -
JACOBSON NATHAN S.,
STEARNS CARL A.,
SMIALEK JAMES L.
Publication year - 1986
Publication title -
advanced ceramic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0883-5551
DOI - 10.1111/j.1551-2916.1986.tb00008.x
Subject(s) - materials science , corrosion , silicon carbide , metallurgy , combustor , deposition (geology) , substrate (aquarium) , silicon , carbide , composite material , combustion , chemistry , paleontology , oceanography , organic chemistry , sediment , biology , geology
Sintered α‐SiC was examined in both oxidation and hot corrosion with a burner rig at 400 kPa (4 atm) and 1000°C with a flow velocity of 94 m/s (310 ft/s). Oxidation tests for times to 46 h produced virtually no attack, whereas tests with 4 ppm Na produced extensive corrosion in 13.5 h. Thick glassy layers composed primarily of sodium silicate formed in the salt corrosion tests. This corrosion attack caused severe pitting on the silicon carbide substrate and led to a 32% decrease in strength, compared to the as‐received material. Parallel furnace tests of Na 2 SO 4 /air‐induced attack yielded basically similar results, with slight product composition differences. The differences are explained in terms of the continuous sulfate deposition which occurs in a burner rig.