Method for preventing low-temperature degradation of tetragonal zirconia
containing materials
    5.
    发明授权
    Method for preventing low-temperature degradation of tetragonal zirconia containing materials 失效
    防止含四方氧化锆的材料的低温降解的方法

    公开(公告)号:US4853353A

    公开(公告)日:1989-08-01

    申请号:US148726

    申请日:1988-01-25

    IPC分类号: C04B35/486

    CPC分类号: C04B35/486

    摘要: A ceramic body has a surface region that contains tetragonal zirconia. The body is partially stabilized with yttria and, optionally, ceria. Substantially the entire surface region is composed of recrystallized tetragonal strain free grains of yttrium oxide zirconium oxide. The content of yttrium in the surface region is substantially the same as the average content of yttrium in the ceramic body, and the surface region is covered with a thin layer of stable tetragonal grains.

    摘要翻译: 陶瓷体具有包含四方晶氧化锆的表面区域。 身体部分地用氧化钇和任选地二氧化铈稳定。 基本上整个表面区域由氧化钇氧化锆的重晶化四方无应变晶粒组成。 表面区域中的钇的含量与陶瓷体的钇的平均含量基本相同,表面区域覆盖有稳定的四方晶格的薄层。

    Gel cast molding with fugitive molds
    6.
    发明授权
    Gel cast molding with fugitive molds 失效
    凝胶浇注成型与逃逸模具

    公开(公告)号:US5824250A

    公开(公告)日:1998-10-20

    申请号:US672858

    申请日:1996-06-28

    IPC分类号: C04B35/622 C04B33/28

    CPC分类号: C04B35/622

    摘要: A ceramic component is manufactured rapidly using a mold made directly from a solid freeform manufacturing process. Solid freeform fabrication, or rapid prototyping, procedures are used to generate molds of materials that are soluble or otherwise fugitive. A gel casting suspension containing ceramic and emulsifying agents is poured into the cavity of the mold and caused to set. The mold is then removed by dissolution or heat treatment, leaving intact the gelcast part. Conventional procedures are then utilized to densify the gelcast component to the required final component. Time consuming and expensive machine tooling procedures are virtually eliminated. Ceramic components are generated rapidly in a cost effective manner.

    摘要翻译: 使用直接由固体自由形成制造工艺制成的模具快速制造陶瓷部件。 使用固体自由形式制造或快速原型制作程序来生产可溶或其他易失性物质的模具。 将含有陶瓷和乳化剂的凝胶浇注悬浮液倒入模具的腔体中并使其凝固。 然后通过溶解或热处理除去模具,保留凝胶体部分。 然后使用常规程序将凝胶体组分致密化成所需的最终组分。 实际上消除了耗时且昂贵的机床加工程序。 以成本有效的方式快速生成陶瓷部件。