Method for fabricating textured ceramics
    6.
    发明授权
    Method for fabricating textured ceramics 有权
    纹理陶瓷的制造方法

    公开(公告)号:US06251335B1

    公开(公告)日:2001-06-26

    申请号:US09303720

    申请日:1999-04-30

    IPC分类号: C04B3332

    CPC分类号: C04B35/111 C04B35/65

    摘要: The process incorporating the invention enables fabrication of dense, highly textured (fraction of oriented grains >20 vol. %) alumina. The method uses a mixture of aluminum metal powder, alumina powder, tabular alumina grains and a liquid phase former. A dry powder mixtures of these components is compacted by dry forming techniques such as roll compaction, uniaxial pressing, forging and/or double action pressing. The formed part is then heated at 0.5-10° C./min. to a temperature between 450 and 500° C. and is held for 2-15 h, and is then heated at 1-10° C/min. to 900-1070° C. and is held for 2-10 hours to convert the aluminum particles into alumina. The part is then heated to a higher temperature (>1400° C.) to form a liquid phase which assists densification and promotes the growth of the tabular alumina grains. The aspect ratio range of the textured alumina grains is from 2-14.

    摘要翻译: 结合本发明的方法能够制造致密的,高度纹理的(部分取向的晶粒> 20体积%)的氧化铝。 该方法使用铝金属粉末,氧化铝粉末,平板状氧化铝颗粒和液相原料的混合物。 这些组分的干粉混合物通过干法成型技术如辊压,单轴压制,锻造和/或双作用压制而压实。 然后将形成的部分加热至0.5-10℃/ min。 温度在450-500℃之间并保持2-15小时,然后以1-10℃/分钟加热。 至900-1070℃,并保持2-10小时以将铝颗粒转化成氧化铝。 然后将该部分加热到更高的温度(> 1400℃)以形成液相,这有助于致密化并促进片状氧化铝颗粒的生长。 纹理氧化铝颗粒的纵横比范围为2-14。

    Tooth implants
    7.
    发明授权
    Tooth implants 失效
    牙植入物

    公开(公告)号:US4293302A

    公开(公告)日:1981-10-06

    申请号:US134082

    申请日:1980-03-26

    IPC分类号: A61C8/00 A61C7/00

    摘要: An improved dental endosteal implant is disclosed. The implant comprises a base and a core. The base is comprised of a bio-compatible material and has first and second ends and side walls which include serrations having substantially planar surfaces facing in the direction of the second end. The depth of the serrations nearest said second end is greater than the depth of the serrations nearest the first end. The core is configured so as to permit cooperative engagement with at least one prosthetic crown.

    摘要翻译: 公开了一种改进的牙科植入物。 植入物包括基底和芯。 基部由生物相容性材料构成,并且具有第一和第二端和侧壁,其包括具有面向第二端的方向的基本平坦的表面的锯齿状。 最靠近第二端的锯齿的深度大于最靠近第一端的锯齿的深度。 芯部构造成允许与至少一个假体冠部的协作接合。