Due to promising results in literature, SiC-Si3N4 particle composites in the range 0–100 percent SiC were evaluated. Focusing on high-temperature properties, mainly Y2O3 was used as sintering additive. Consolidation occurred primarily by hot-pressing, sintering tests were performed for comparison. Besides short-term properties like strength, toughness etc., long-term properties like creep and oxidation behavior were determined. Results as a function of SiC-content and microstructure were discussed with respect to materials’ performance at high temperatures and possibilities of their production on a technical scale. [S0742-4795(00)00201-5]

Issue Section:
Gas Turbines: Ceramics
Keywords:
particle reinforced composites, silicon compounds, carbon compounds, nitrogen compounds, high-temperature effects, ceramics, hot pressing, sintering, creep testing, oxidation, crystal microstructure, fracture toughness testing, hardness testing
Topics:
Composite materials, Creep, High temperature, Oxidation, Particulate matter, Sintering, Temperature, Fracture toughness, Grain boundaries, Hot pressing, Silicon nitride ceramics
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