Hot-corrosion of silicon carbide in combustion gases at temperatures above the dew point of salts

To evaluate the performance of SiC to operating environments expected in future ceramic gas turbines, SiC samples were exposed in a low velocity burner rig at temperatures above the dew point of sodium sulphate (Na2SO4). Under these conditions, the corrosion behaviour should be independent of the sulphur content of the fuel, if Na2SO4(g) is not involved in the corrosion process. At 1000°C, SiC degradation was dependent on the sulphur levels in …