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    Cooled laser mirror materials
    2.
    发明授权
    Cooled laser mirror materials 失效
    冷却激光镜材料

    公开(公告)号：US5579333A

    公开(公告)日：1996-11-26

    申请号：US772492

    申请日：1985-09-04

    申请人： Jeffrey T. Neil ,  J. Thomas Smith

    发明人： Jeffrey T. Neil ,  J. Thomas Smith

    IPC分类号： G02B7/18 ,  C02B5/08

    CPC分类号： G02B7/1815

    摘要： An improved cooled high power laser mirror system is described which uses ailicon mirror face with an attached silicon nitride based heat exchanger assembly. The silicon nitride provides a high strength, high toughness, and stiff backup assembly. The particular silicon nitride system is microstructurally engineered to provide a thermal expansion match to silicon designed to insure high quality bonding and minimum mirror distortion.

    摘要翻译： 描述了一种改进的冷却大功率激光反射镜系统，其使用具有附接的氮化硅基热交换器组件的硅镜面。 氮化硅提供高强度，高韧性和刚性的后备组件。 特定的氮化硅系统被微结构设计以提供与设计用于确保高质量接合和最小镜面失真的硅的热膨胀匹配。

    Apparatus and process for automatically measuring aperture size of apertured material
    3.
    发明授权
    Apparatus and process for automatically measuring aperture size of apertured material 失效
    用于自动测量孔径材料的孔径尺寸的设备和工艺

    公开(公告)号：US4533251A

    公开(公告)日：1985-08-06

    申请号：US158023

    申请日：1980-06-09

    申请人： Kenneth French ,  Robert C. Kocher ,  Alfred Piorkow ,  Kenneth Shaner ,  J. Thomas Smith

    发明人： Kenneth French ,  Robert C. Kocher ,  Alfred Piorkow ,  Kenneth Shaner ,  J. Thomas Smith

    IPC分类号： G01B11/02

    CPC分类号： G01B11/02

    摘要： Apparatus for automatically measuring aperture size of apertured material includes a means for supporting and transporting the apertured material and a light source providing a light beam directed for passage through the apertured material to a light detector and is characterized by a comparator mask of alternate light transparent and opaque sectors of a given dimension and means for overlaying the apertured material with the comparator mask to provide a given length of light transparent slot and responsive to signals representing light transmitted through the given length of slot for deriving a signal representing the width of the slots of the slotted material. Also, a process for automatically measuring aperture size includes the steps of overlaying the slotted material with the comparator mask and utilizing a signal from the light detector representing light transmission of the slots of a given length to derive a signal representative of the slot width.

    摘要翻译： 用于自动测量多孔材料的孔径尺寸的装置包括用于支撑和输送多孔材料的装置和一个光源，该光源提供一个指向的光束，以便通过多孔材料到光检测器，并且其特征在于： 给定尺寸的不透明扇区以及用于利用比较器掩模覆盖有孔材料的装置，以提供给定长度的光透明时隙，并且响应于表示通过给定长度的时隙传输的光的信号，用于导出表示槽的宽度的信号 开槽材料。 此外，用于自动测量孔径尺寸的过程包括以下步骤：用比较器掩模覆盖开槽材料，并利用表示给定长度的槽的光传输的光检测器的信号来导出代表槽宽度的信号。

    Oxidation resistant silicon nitride containing rare earth oxide
    4.
    发明授权
    Oxidation resistant silicon nitride containing rare earth oxide 失效
    含氧化氮化硅的稀土氧化物

    公开(公告)号：US4350771A

    公开(公告)日：1982-09-21

    申请号：US303445

    申请日：1981-09-18

    申请人： J. Thomas Smith

    发明人： J. Thomas Smith

    IPC分类号： C04B35/584 ,  C04B35/593 ,  C04B35/50 ,  C04B35/58

    CPC分类号： C04B35/584 ,  C04B35/593

    摘要： Si.sub.3 N.sub.4 polycrystalline ceramic bodies formed from starting materials containing about 2 to 4 weight percent SiO.sub.2, less than 0.1 weight percent cation impurities and Y.sub.2 O.sub.3 in critical amounts exhibit optimum oxidation resistance. Such bodies are useful as engine parts or components or as regenerator structures for waste heat recovery.

    摘要翻译： 由起始材料形成的Si3N4多晶陶瓷体，其含有约2至4重量％的SiO 2，少于0.1重量％的阳离子杂质和临界量的Y 2 O 3表现出最佳的抗氧化性。 这样的物体可用作发动机部件或部件或用作废热回收的再生器结构。

    Silicon nitride based ceramics and method
    5.
    发明授权
    Silicon nitride based ceramics and method 失效
    氮化硅基陶瓷和方法

    公开(公告)号：US4603116A

    公开(公告)日：1986-07-29

    申请号：US781314

    申请日：1985-09-27

    申请人： J. Thomas Smith ,  Carr Lane W. Quackenbush ,  Anthony P. Moschetti ,  Helmut Lingertat

    发明人： J. Thomas Smith ,  Carr Lane W. Quackenbush ,  Anthony P. Moschetti ,  Helmut Lingertat

    IPC分类号： C04B35/584 ,  C04B35/58

    CPC分类号： C04B35/584

    摘要： A method of preparing fully dense silicon nitride based ceramic articles comprises the steps of blending a metal oxide component and silicon nitride, wherein a portion of the silicon nitride comprises acicular crystals; comminuting the powder mixture to reduce the aspect ratio of the acicular crystals to an average of less than about 3; pressing the comminuted powder to form a compact; and pressureless sintering the compact to a fully dense ceramic body. Powder mixtures and powder compacts for forming fully dense silicon nitride based ceramic bodies are also disclosed.

    摘要翻译： 一种制备完全致密的氮化硅基陶瓷制品的方法包括以下步骤：混合金属氧化物组分和氮化硅，其中一部分氮化硅包括针状结晶; 将粉末混合物粉碎以将针状晶体的长宽比平均降低至约3; 挤压粉碎成粉末; 并将压块无压烧结成完全致密的陶瓷体。 还公开了用于形成完全致密的氮化硅基陶瓷体的粉末混合物和粉末压块。