Degradation of silicon carbide-based materials in a high temperature combustion environment
The hot-salt corrosion behaviour of two SiC-based ceramics (a gas pressure sintered SiC and a hot-pressed SiC/graphite composite) has been studied in simulated combustion environments with 0.01 wt% sulphur (Jet A1) or 1 Wt% sulphur (marine diesel) liquid fuels using a low velocity burner rig. Tests were carried out for a total time of 50 hours at temperatures of 1100 C and 1200 C. After an initial loss of graphite due to the evolution of carbon oxides, particularly marked in the case of the composite, the weight change measurements showed a parabolic rate of growth of a surface layer, suggesting that the rate of reaction was controlled by diffusion. The results of microstructural investigations are presented and the mechanisms governing corrosion are discussed.
Bibliographic Reference: Paper presented: 4th European Ceramic Society Conference, Riccione (IT), October, 1995
Availability: Available from (1) as Paper EN 39180 ORA
Record Number: 199511344 / Last updated on: 1995-10-31
Original language: en
Available languages: en