Evaluation of Corrosion/Erosion Behavior of Various Ceramic Materials.
Final rept. 1 Sep 80-30 Jun 83,
IIT RESEARCH INST CHICAGO ILL MECHANICS OF MATERIALS RESEARCH DIV
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Baseline and simulated environment post-exposure test results of fourteen candidate ceramic materials for stationary power-generating gas turbines are presented. The materials studied were various material types of silicon nitride, silicon carbide, aluminum nitride, A1203-Zr02, A1203-SiC, MgA1204 spinel, and SiA1ON. One dynamic 1425 deg C, 305 ms, 1000 hr and nine static 1000 deg, 1200 deg, and 1425 deg C for 100, 300, and 1000 hr exposures were conducted at the Morgantown Energy Technology Center facility of the Department of Energy. The exposure environment was coal-derived fuel gas combustion products created in a fixed-bed gasification system. Post-exposure evaluation involved evaluation of surface chemistry and morphology, weight and dimension change, retained room-temperature strength and fracture surface analysis. Based upon limited testing and the small sample population available, the materials are ranked according to their probable survivability in power turbine applications.
- Ceramics, Refractories and Glass