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    4.
    发明专利
    未知

    公开(公告)号：AT71923T

    公开(公告)日：1992-02-15

    申请号：AT87310395

    申请日：1987-11-25

    Applicant: CORNING GLASS WORKS

    Inventor： CHYUNG KENNETH ,  GADKAREE KISHOR PURUSHOTTAM ,  STEWART RONALD LEROY ,  TAYLOR MARK PETER

    IPC: C03C3/062 ,  C03C3/097 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00

    Abstract: The present invention is directed to the production of SiC whisker- and/or fiber-reinforced, internally-nucleated glass-ceramic matrix composite articles consisting essentially of 0.5-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers substantially uniformly distributed in a glass-ceramic matrix consisting essentially, in weight percent on the oxide basis, of 16-20% CaO, 38.5-46% Al2O3, 35-42% SiO2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% CR2O3, 0.25-3% HfO2, 2-5% MoO3, 0.25-3% Nb2O5, 0.25-3% Ta2O5, 0.25-3% WO3, and 1-10% ZrO2, wherein Al2O3 is present in an amount which is at least 5 mole percent and up to 50 mole percent in excess of that present in stoichiometric triclinic anorthite, and wherein the predominant crystal phases in the glass-ceramic are triclinic anorthite and mullite and/or alpha -Al2O3. Up to 1.5% As2O3 may advantageously be included in the composition.

    8.
    发明专利
    未知

    公开(公告)号：DE3776315D1

    公开(公告)日：1992-03-05

    申请号：DE3776315

    申请日：1987-11-25

    Applicant: CORNING GLASS WORKS

    Inventor： CHYUNG KENNETH ,  GADKAREE KISHOR PURUSHOTTAM ,  STEWART RONALD LEROY ,  TAYLOR MARK PETER

    IPC: C03C3/062 ,  C03C3/097 ,  C03C10/00 ,  C03C10/06 ,  C03C14/00

    Abstract: The present invention is directed to the production of SiC whisker- and/or fiber-reinforced, internally-nucleated glass-ceramic matrix composite articles consisting essentially of 0.5-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers substantially uniformly distributed in a glass-ceramic matrix consisting essentially, in weight percent on the oxide basis, of 16-20% CaO, 38.5-46% Al2O3, 35-42% SiO2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% CR2O3, 0.25-3% HfO2, 2-5% MoO3, 0.25-3% Nb2O5, 0.25-3% Ta2O5, 0.25-3% WO3, and 1-10% ZrO2, wherein Al2O3 is present in an amount which is at least 5 mole percent and up to 50 mole percent in excess of that present in stoichiometric triclinic anorthite, and wherein the predominant crystal phases in the glass-ceramic are triclinic anorthite and mullite and/or alpha -Al2O3. Up to 1.5% As2O3 may advantageously be included in the composition.

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