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    DENSE SKIN CERAMIC STRUCTURE AND METHOD OF MAKING THE SAME
    2.
    发明专利
    DENSE SKIN CERAMIC STRUCTURE AND METHOD OF MAKING THE SAME 未知

    公开(公告)号：ZA875716B

    公开(公告)日：1988-02-11

    申请号：ZA875716

    申请日：1987-08-03

    Applicant: LANXIDE TECHNOLOGY COMPANY, LP.

    Inventor： STANLEY JOSEPH LUSZCZ ,  HARRY RICHARD ZWICKER

    IPC: C04B35/622 ,  C04B35/10 ,  C04B35/65 ,  C22C29/12 ,  C04B ,  C22C ,  B28B

    Abstract: The disclosure concerns self-supporting ceramic structures, including ceramic composite structures embedding a filler, and methods of making them. The ceramic structures comprise a polycrystlline material made by oxidation of a body of molten parent metal with an oxidant. The polycrystalline material has a first region substrate surmounted by a terminal region stratum which is integral with the first region. The terminal region stratum which is harder and of denser, finer crystalline structure than the first region substrate and is formed in a reaction stage subsequent to the reaction stage in which the first region of polycrystalline material is formed. Growth of the first stage is attained by by attenuating or interrupting the transport of molten parent metal to the first region under conditions which nonetheless leave or maintain therein enough oxidizable molten parent metal to form the polycrystalline material of the terminal region.

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