To provide: a silicon nitride sintered body having excellent mechanical property, in particular fracture toughness, and having long lifetime of a product into which the silicon nitride sintered body is processed; a rolling element using the silicon nitride sintered body; and a bearing. The silicon nitride sintered body contains a rare earth element and an aluminum element. The silicon nitride sintered body contains 6-13 wt% of the rare earth element in terms of oxide, and 6-13 wt% of the aluminum element in terms of oxide, relative to the total weight of the silicon nitride sintered body. The silicon nitride sintered body contains an inclusion (I) in a surface layer portion that is a region within 2 mm from a surface of the silicon nitride sintered body. A ratio of a total sectional area of the inclusion (I) to a total sectional area of the surface layer portion is 0.05% or more.


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    Titel :

    SILICON NITRIDE SINTERED BODY, ROLLING BODY USING SAME, AND BEARING


    Weitere Titelangaben:

    SILICIUMNITRID-SINTERKÖRPER, WÄLZKÖRPER DAMIT UND LAGER
    CORPS FRITTÉ DE NITRURE DE SILICIUM, CORPS ROULANT L'UTILISANT, ET PALIER


    Beteiligte:

    Erscheinungsdatum :

    2023-07-12


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    C04B Kalk , LIME / B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F16C SHAFTS , Wellen



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