Abstract
The thermal erosion of a set of bulk fully dense and 10% porous ZrB2-based ceramics of different composition were machined as sharp wing and tested in an air-fuel mixture flow formed by mixing air and kerosene with an oxygen content ~ 5wt%. The resulting pressure in the combustion chamber was 0.8MPa and the flow temperature was 1500°C. Microstructural analyses upon the tests evidenced that criteria for material success include high density and high thermal conductivity, along with formation of stable compounds. These results were supported by numerical simulation. Among all tested materials, only ZrB2-15 MoSi2 (ZM) ceramics met all the requirements and successfully survived the thermal erosion test up to 1200sec.
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