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    Ceramic material for use in casting reactive metals
    2.
    发明授权
    Ceramic material for use in casting reactive metals 失效

    公开(公告)号：US5580837A

    公开(公告)日：1996-12-03

    申请号：US378452

    申请日：1995-01-26

    申请人： Gerald C. Dodds ,  Ricky A. Alexander

    发明人： Gerald C. Dodds ,  Ricky A. Alexander

    IPC分类号： C04B35/117 ,  C04B35/638 ,  B28B7/28

    CPC分类号： C04B35/638 ,  C04B35/117

    摘要： An improved sintered ceramic core is used in a mold during the casting of a reactive metal. Prior to sintering, the core contains ceramic material which includes yttrium aluminate and alumina (Al.sub.2 O.sub.3). It is preferred to have the ceramic material contain between 10% and 40% yttrium aluminate. Prior to sintering, the yttrium aluminate has a mean particle size of less than 20 microns and, preferably, less than 10 microns. Particularly advantageous results has been obtained by using yttrium aluminate having a mean particle size, prior to sintering, of approximately 3 microns. It is contemplated that the ceramic material will be utilized to form other articles, such as a mold, filter, or liner for a ladle, which are exposed to reactive metals during casting.

    Boron nitride-toughened single phase silicon aluminum oxynitride composite, article and method of making same
    4.
    发明授权
    Boron nitride-toughened single phase silicon aluminum oxynitride composite, article and method of making same 失效
    氮化硼增韧单相硅铝氮化铝复合材料及其制备方法

    公开(公告)号：US5925584A

    公开(公告)日：1999-07-20

    申请号：US287179

    申请日：1988-12-21

    申请人： Gerald C. Dodds ,  Richard A. Tanzilli

    发明人： Gerald C. Dodds ,  Richard A. Tanzilli

    IPC分类号： C04B35/597 ,  H01Q1/12 ,  H01Q15/00 ,  C06B35/58

    CPC分类号： H01Q1/1271 ,  C04B35/597

    摘要： Multiphase ceramic composites containing single phase silicon aluminum oxynitride and boron nitride wherein the boron nitride is one phase in the composite and the single phase silicon aluminum oxynitride is the matrix phase in the composite. The boron nitride phase is uniformly distributed in the form of discrete particles throughout the single phase silicon aluminum oxynitride matrix. A window transparent to electromagnetic radiation in a predetermined frequency spectrum is made by forming a homogeneous, finely-divided mixture of boron nitride and single phase silicon aluminum oxynitride matrix-forming compound and compacting the homogeneous, finely-divided mixture at an elevated temperature and pressure for a sufficient time to form the composite. In a preferred embodiment, about 75% by weight homogeneous, finely-divided mixture of single phase silicon aluminum oxynitride matrix-forming compound and the balance boron nitride is densified at a temperature of 1,760.degree. C. and at a pressure of about 3,775 p.s.i. for about 1 hour. The single phase silicon aluminum oxynitride corresponds to the formula: Si.sub.6-x Al.sub.x O.sub.x N.sub.8-x, where x is at least 0.1 and less than or equal to 4.2, and preferably 3 or 4. The single phase silicon aluminum oxynitride matrix is derived from any effective combination of aluminum nitride, silicon nitride, silica and alumina.

    摘要翻译： 包含单相硅氮氧化铝和氮化硼的多相陶瓷复合材料，其中氮化硼是复合材料中的一相，单相硅铝氧氮化物是复合材料中的基体相。 氮化硼相在整个单相硅铝氧氮化物基体中以分散的颗粒的形式均匀分布。 通过形成氮化硼和单相硅铝氮氧化铝基质形成化合物的均匀，细分的混合物并在高温和高压下压制均匀的细碎混合物来制备在预定频谱中对电磁辐射透明的窗口 足够的时间来形成复合材料。 在优选的实施方案中，将约75重量％的单相硅铝氧氮化物基质形成化合物和余量氮化硼的均匀的细分散混合物在1760℃的温度和约3,775p.s.i的压力下致密化。 约1小时。 单相硅铝氧氮化物对应于下式：Si 6-x Al x O x N x-x，其中x为至少0.1且小于或等于4.2，优选为3或4.单相硅铝氧氮化物基体衍生自 任何有效组合的氮化铝，氮化硅，二氧化硅和氧化铝。

    Method of forming a cast metal article
    5.
    发明授权
    Method of forming a cast metal article 有权
    铸造金属制品的成型方法

    公开(公告)号：US07905273B2

    公开(公告)日：2011-03-15

    申请号：US11899217

    申请日：2007-09-05

    申请人： Gerald C. Dodds ,  Jonathan Jarrabet ,  Lawrence D. Graham

    发明人： Gerald C. Dodds ,  Jonathan Jarrabet ,  Lawrence D. Graham

    IPC分类号： B22C9/04

    CPC分类号： B22C9/103 ,  B22C7/02 ,  B22C9/04

    摘要： An unfired ceramic base core having a first coefficient of thermal expansion is provided. A core element having a second coefficient of thermal expansion is positioned in an opening formed in the unfired ceramic base core. The opening in the unfired ceramic base core is filled with a filler material having a third coefficient of thermal expansion. The third coefficient of thermal expansion is greater than the first coefficient of thermal expansion and less than the second coefficient of thermal expansion. The ceramic base core is fired without cracking the base core and without cracking the filler material. The ceramic base core contains silica and zircon and has a silica content of 70% or less and a zircon content of 30% or more. The core element may be formed of a ceramic material or a refractory metal.

    摘要翻译： 提供具有第一热膨胀系数的未焙烧陶瓷基底芯。 具有第二热膨胀系数的芯元件位于未烧结的陶瓷基底芯中形成的开口中。 在未焙烧的陶瓷基底芯中的开口填充有具有第三热膨胀系数的填充材料。 第三热膨胀系数大于第一热膨胀系数，小于第二热膨胀系数。 烧制陶瓷基芯不会使基体芯破裂，也不会使填料破裂。 陶瓷基核含有二氧化硅和锆石，二氧化硅含量为70％以下，锆石含量为30％以上。 芯元件可以由陶瓷材料或难熔金属形成。

    Supporting ceramic articles during firing
    6.
    发明授权
    Supporting ceramic articles during firing 有权
    烧制时支撑陶瓷制品

    公开(公告)号：US07780905B2

    公开(公告)日：2010-08-24

    申请号：US12074679

    申请日：2008-03-04

    申请人： Gerald C. Dodds

    发明人： Gerald C. Dodds

    IPC分类号： C04B33/32

    CPC分类号： F27D5/0006 ,  C04B35/64 ,  F27D3/0021

    摘要： An adjustable mold is used to mold material to form a first support. A first ceramic article is supported by the first support during firing. The adjustable mold may be adjusted and used to mold material to form a second support having a second configuration. The second support is used to support a second ceramic article during firing. The first and second supports may advantageously be formed with projections which engage the ceramic articles during firing. The length of these projections may be varied by adjusting the mold. A second adjustable mold may be used to form a first retainer which limits upward movement of the first ceramic article during firing. The second adjustable mold may be adjusted and used to form a second retainer which limits upward movement of the second ceramic article during firing.

    摘要翻译： 使用可调模具来模制材料以形成第一支撑件。 第一陶瓷制品在烧制期间由第一支撑件支撑。 可调整的模具可用于模制材料以形成具有第二构造的第二支撑件。 第二个支架用于在烧制过程中支撑第二个陶瓷制品。 第一和第二支撑件可以有利地形成有在烧制期间与陶瓷制品接合的突起。 这些突起的长度可以通过调节模具来改变。 可以使用第二可调模具来形成在烧制期间第一陶瓷制品向上运动的第一保持器。 可以调节第二可调模具并且用于形成第二保持器，该第二保持器在烧制期间限制第二陶瓷制品的向上运动。

    Supporting ceramic articles during firing
    7.
    发明申请
    Supporting ceramic articles during firing 有权
    烧制时支撑陶瓷制品

    公开(公告)号：US20090224441A1

    公开(公告)日：2009-09-10

    申请号：US12074679

    申请日：2008-03-04

    申请人： Gerald C. Dodds

    发明人： Gerald C. Dodds

    IPC分类号： F27D5/00 ,  C04B33/32 ,  B29C33/00

    CPC分类号： F27D5/0006 ,  C04B35/64 ,  F27D3/0021

    摘要： An adjustable mold is used to mold material to form a first support. A first ceramic article is supported by the first support during firing. The adjustable mold may be adjusted and used to mold material to form a second support having a second configuration. The second support is used to support a second ceramic article during firing. The first and second supports may advantageously be formed with projections which engage the ceramic articles during firing. The length of these projections may be varied by adjusting the mold. A second adjustable mold may be used to form a first retainer which limits upward movement of the first ceramic article during firing. The second adjustable mold may be adjusted and used to form a second retainer which limits upward movement of the second ceramic article during firing.

    摘要翻译： 使用可调模具来模制材料以形成第一支撑件。 第一陶瓷制品在烧制期间由第一支撑件支撑。 可调整的模具可用于模制材料以形成具有第二构造的第二支撑件。 第二个支架用于在烧制过程中支撑第二个陶瓷制品。 第一和第二支撑件可以有利地形成有在烧制期间与陶瓷制品接合的突起。 这些突起的长度可以通过调节模具来改变。 可以使用第二可调模具来形成在烧制期间第一陶瓷制品向上运动的第一保持器。 可以调节第二可调模具并且用于形成第二保持器，该第二保持器在烧制期间限制第二陶瓷制品的向上运动。

    Method of forming a cast metal article
    9.
    发明申请
    Method of forming a cast metal article 有权
    铸造金属制品的成型方法

    公开(公告)号：US20090056902A1

    公开(公告)日：2009-03-05

    申请号：US11899217

    申请日：2007-09-05

    申请人： Gerald C. Dodds ,  Jonathan Jarrabet ,  Lawrence D. Graham

    发明人： Gerald C. Dodds ,  Jonathan Jarrabet ,  Lawrence D. Graham

    IPC分类号： B22C9/00

    CPC分类号： B22C9/103 ,  B22C7/02 ,  B22C9/04

    摘要： An unfired ceramic base core having a first coefficient of thermal expansion is provided. A core element having a second coefficient of thermal expansion is positioned in an opening formed in the unfired ceramic base core. The opening in the unfired ceramic base core is filled with a filler material having a third coefficient of thermal expansion. The third coefficient of thermal expansion is greater than the first coefficient of thermal expansion and less than the second coefficient of thermal expansion. The ceramic base core is fired without cracking the base core and without cracking the filler material. The ceramic base core contains silica and zircon and has a silica content of 70% or less and a zircon content of 30% or more. The core element may be formed of a ceramic material or a refractory metal.

    摘要翻译： 提供具有第一热膨胀系数的未焙烧陶瓷基底芯。 具有第二热膨胀系数的芯元件位于未烧结的陶瓷基底芯中形成的开口中。 在未焙烧的陶瓷基底芯中的开口填充有具有第三热膨胀系数的填充材料。 第三热膨胀系数大于第一热膨胀系数，小于第二热膨胀系数。 烧制陶瓷基芯不会使基体芯破裂，也不会使填料破裂。 陶瓷基核包含二氧化硅和锆石，二氧化硅含量为70％以下，锆石含量为30％以上。 芯元件可以由陶瓷材料或难熔金属形成。