Reinforced calcium aluminosilicate glass-ceramics
    6.
    发明授权
    Reinforced calcium aluminosilicate glass-ceramics 失效
    增强铝硅酸铝玻璃陶瓷

    公开(公告)号:US4755489A

    公开(公告)日:1988-07-05

    申请号:US943072

    申请日:1986-12-18

    摘要: 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% Al.sub.2 O.sub.3, 35-42% SiO.sub.2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% Cr.sub.2 O.sub.3, 0.25-3% HfO.sub.2, 2-5% MoO.sub.3, 0.25-3% Nb.sub.2 O.sub.5, 0.25-3% Ta.sub.2 O.sub.5, 0.25-3% WO.sub.3, and 1-10% ZrO.sub.2, wherein Al.sub.2 O.sub.3 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.-Al.sub.2 O.sub.3. Up to 1.5% As.sub.2 O.sub.3 may advantageously be included in the composition.

    摘要翻译: 本发明涉及生产基本上由0.5-60%(重量)SiC晶须和/或15-70%(体积)陶瓷纤维组成的SiC晶须和/或纤维增强的,内部成核的玻璃 - 陶瓷基复合材料 基本上均匀分布在基本上以氧化物为基准重量百分比为16-20%,CaO,38.5-46%Al2O3,35-42%SiO2和至多10%总共的至少一种 指定比例的成核剂选自0.1-3%Cr2O3,0.25-3%HfO2,2.5%MoO3,0.25-3%Nb2O5,0.25-3%Ta2O5,0.23%WO3和1% -10%的ZrO 2,其中Al 2 O 3以至少5摩尔%且高达50摩尔%的量存在于化学计量的三斜钙石中存在,并且其中玻璃 - 陶瓷中的主要结晶相是三斜长岩和 莫来石和/或α-Al2O3。 高达1.5%的As2O3可以有利地包括在组合物中。

    Reinforcement of alkaline earth aluminosilicate glass-ceramics
    7.
    发明授权
    Reinforcement of alkaline earth aluminosilicate glass-ceramics 失效
    增强碱土铝硅酸盐玻璃陶瓷

    公开(公告)号:US4615987A

    公开(公告)日:1986-10-07

    申请号:US723572

    申请日:1985-04-15

    摘要: The present invention is directed to SiC whisker and/or fiber reinforced glass-ceramic matrix composite articles wherein an alkaline earth aluminosilicate constitutes the predominant crystal phase. More particularly the composite articles will consist essentially of 10-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers and the glass-ceramic matrix will consist essentially, by weight on the oxide basis, of______________________________________ CaO 0-25 MgO 0-15 SrO 0-30 Na.sub.2 O 0-4 CaO + SrO 10-30 K.sub.2 O 0-6 Al.sub.2 O.sub.3 25-38 TiO.sub.2 0-12 SiO.sub.2 35-60 ZrO.sub.2 0-15 BaO 0-25 As.sub.2 O.sub.3 0-3 BaO + MgO + Na.sub.2 O + K.sub.2 O + TiO.sub.2 ZrO.sub.2 + As.sub.2 O.sub.3 0-30 ______________________________________ The preferred predominant crystal phase is selected from the group of anorthite and its pseudo-binaries, with mullite, cordierite, barium osumilite, and albite solid solution.

    摘要翻译: 本发明涉及SiC晶须和/或纤维增强玻璃 - 陶瓷基复合材料制品,其中碱土铝硅酸盐构成主要晶相。 更具体地,复合制品将基本上由10-60重量%的SiC晶须和/或15-70体积%的陶瓷纤维组成,并且玻璃 - 陶瓷基体将基本上由氧化物基础上由-CaO 0- 25 MgO 0-15 -SrO 0-30 Na2O 0-4 -CaO + SrO 10-30 K2O 0-6 -Al2O3 25-38 TiO2 0-12 -SiO2 35-60 ZrO2 0-15 -BaO 0-25 As2O3 0 -3BaO + MgO + Na2O + K2O + TiO2ZrO2 + As2O3 0-30 - 优选的主要结晶相选自钙长石及其伪二进制,与莫来石,堇青石,奥斯米石和钠长石固溶体相组合。

    Bonding frits for ceramic composites
    10.
    发明授权
    Bonding frits for ceramic composites 失效
    陶瓷复合材料的粘结玻璃料

    公开(公告)号:US4973564A

    公开(公告)日:1990-11-27

    申请号:US402516

    申请日:1989-09-05

    摘要: A sealing method and sealed assemblies incorporating novel devitrifiable sealing frits based on thermally crystallizable alkaline earth aluminosilicate glasses, are disclosed. The frits exhibit improved compatibility with refractory composites employed for the fabrication of high temperature fiber-reinforced glass-ceramic assemblies and can be cured at temperatures below those needed to cure prior art sealing compositions to provide strong seals wherein refractory crystal phases selected from the group consisting of anorthite (CaO.Al.sub.2 O.sub.3.2SiO.sub.2), celsian (BaO.Al.sub.2 O.sub.3.2SiO.sub.2), and sanidine, orthoclase or other potash feldspar (K.sub.2 O.Al.sub.2 O.sub.3.6SiO.sub.2) polymorphs constitute the principal phases.