NON-OXIDE CERAMIC STRUCTURE HAVING HIGH-TEMPERATURE-CORROSION-RESISTANT LAYER AND METHOD FOR PRODUCI

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PROBLEM TO BE SOLVED : To provide a non-oxide ceramic structure which resists to high-temperature corrosion at a high temperature above 1, 000°C in an environment where steam and an alkali are present and to provide a method for producing the same. SOLUTION : The non-oxide ceramic structure comprises a non-oxide ceramic substrate and a high-temperature-corrosion-resistant layer formed thereon and containing an eutectic crystal of a rare earth silicate (Ln2Si2O7, where Ln is a rare earth element) and mullite (Al6Si2O13). The method for producing the same and a structural member are also provided.