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13 records (took 0.026 seconds)

    1.
    发明专利
    失效

    公开(公告)号：JPS6220152B2

    公开(公告)日：1987-05-06

    申请号：JP5395679

    申请日：1979-05-01

    Applicant: ASEA AB

    Inventor： YAN ADORERUBORUN ,  HANSU RAAKAA ,  YAN NIRUSUSON

    IPC: C04B35/584 ,  B22F3/12 ,  C04B35/593 ,  C04B35/645

    Abstract: Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

    MANUFACTURE OF SILICON NITRIDE PRODUCT
    6.
    发明专利
    MANUFACTURE OF SILICON NITRIDE PRODUCT 失效

    公开(公告)号：JPS54144412A

    公开(公告)日：1979-11-10

    申请号：JP5395679

    申请日：1979-05-01

    Applicant: ASEA AB

    Inventor： YAN ADORERUBORUN ,  HANSU RAAKAA ,  YAN NIRUSUSON

    IPC: C04B35/584 ,  B22F3/12 ,  C04B35/593 ,  C04B35/645

    Abstract: Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

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