利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.029 秒)

    Engineered ceramic components for the leading edge of a helicopter rotor blade
    3.
    发明授权
    Engineered ceramic components for the leading edge of a helicopter rotor blade 失效
    用于直升机转子叶片前缘的工程陶瓷部件

    公开(公告)号：US5542820A

    公开(公告)日：1996-08-06

    申请号：US363498

    申请日：1994-12-23

    申请人： Harry E. Eaton ,  John E. Holowczak ,  William C. Reinfelder

    发明人： Harry E. Eaton ,  John E. Holowczak ,  William C. Reinfelder

    IPC分类号： B64C27/473 ,  F04D29/18

    CPC分类号： B64C27/473 ,  B64C2027/4736

    摘要： An engineered ceramic component for the leading edge of a rotor blade provides enhanced erosion protection therefor. In one embodiment, the engineered ceramic component includes a strain isolator member, an aerodynamic ceramic member, a first adhesive bond layer, and a second adhesive bond layer. The strain isolator member, which is operative to minimize strain transfer between the rotor blade infrastructure and the aerodynamic ceramic member, is configured so that inner mold line surface thereof is complementary to outer mold line surface of the rotor blade infrastructure. The aerodynamic ceramic member, which is operative to provide enhanced erosion protection for the respective leading edge of the rotor blade, is configured so that the outer mold line surface thereof defines the aerodynamic configuration of the respective leading edge and the inner mold line surface is complementary to the outer mold line surface of the strain isolator member. The aerodynamic ceramic member is fabricated from an engineered ceramic material, which are defined in the present context as ceramic materials having a hardness greater than 1200 kg/mm.sup.2 and an average flexural strength equal to or greater than 40 ksi. The first adhesive bond layer is operative to bond the strain isolator member to the rotor blade infrastructure and the second adhesive bond layer is operative to bond the aerodynamic ceramic member to the strain isolator member. In another embodiment, the engineered ceramic member includes the aerodynamic ceramic member described hereinabove and a thick adhesive layer. The thick adhesive layer is operative to minimize strain transfer between the rotor blade infrastructure and the aerodynamic ceramic member and to bond the aerodynamic ceramic member in combination with the rotor blade infrastructure.

    摘要翻译： 用于转子叶片前缘的工程陶瓷部件为其提供了增强的侵蚀保护。 在一个实施例中，工程陶瓷部件包括应变隔离构件，空气动力学陶瓷构件，第一粘合剂接合层和第二粘合剂接合层。 用于使转子叶片基础设施和空气动力陶瓷构件之间的应变传递最小化的应变隔离构件被构造成使得其内模线表面与转子叶片基础设施的外模线表面互补。 用于为转子叶片的相应前缘提供增强的侵蚀保护的空气动力陶瓷构件被构造成使得其外模具线表面限定相应前缘的空气动力学构造，并且内模线表面是互补的 到应变隔离构件的外模线表面。 空气动力陶瓷构件由工程陶瓷材料制成，其在本上下文中被定义为具有大于1200kg / mm2的硬度和等于或大于40ksi的平均弯曲强度的陶瓷材料。 第一粘合剂层可操作以将应变隔离器构件结合到转子叶片基础设施，并且第二粘合剂粘合层可操作以将空气动力学陶瓷构件结合到应变隔离构件。 在另一个实施例中，工程陶瓷构件包括上述空气动力陶瓷构件和厚粘合剂层。 厚粘合剂层可操作以最小化转子叶片基础设施和空气动力学陶瓷构件之间的应变传递并将空气动力学陶瓷构件与转子叶片基础结构结合。

    Lightweight projectile resistant armor system
    7.
    发明授权
    Lightweight projectile resistant armor system 有权
    轻量级防弹装甲系统

    公开(公告)号：US09103633B2

    公开(公告)日：2015-08-11

    申请号：US11682390

    申请日：2007-03-06

    申请人： John E. Holowczak ,  Connie E. Bird

    发明人： John E. Holowczak ,  Connie E. Bird

    IPC分类号： F41H5/00 ,  F41H5/04

    CPC分类号： F41H5/0414

    摘要： An armor system with a lightweight armored panel manufactured as a multi-material structure having a multiple of layers including a hard ballistic material layer of a Ceramic/CMC (Ceramic Matrix Composite) hybrid armor material capable of defeating ballistic threats.

    摘要翻译： 具有轻质装甲面板的装甲系统，其制造为具有多层的多层材料结构，其中包括能够击退弹道威胁的陶瓷/ CMC（陶瓷矩阵复合）混合装甲材料的硬质弹性材料层。

    Low dieletric constant erosion resistant material
    10.
    发明授权
    Low dieletric constant erosion resistant material 失效
    低耐腐蚀耐腐蚀材料

    公开(公告)号：US06447254B1

    公开(公告)日：2002-09-10

    申请号：US09861125

    申请日：2001-05-18

    申请人： John E. Holowczak ,  Elliot Olster ,  Willard H. Sutton

    发明人： John E. Holowczak ,  Elliot Olster ,  Willard H. Sutton

    IPC分类号： B64C1124

    CPC分类号： F01D5/284 ,  B64C11/205 ,  B64C27/473 ,  Y02T50/672 ,  Y02T50/673

    摘要： An erosion resistant ceramic component is synthesized from a silicon oxynitride precursor powder with a sintering aide. The sintering aide, preferably aluminum oxide and/or lutetium oxide are added to the silicon oxynitride precursor powder and ball milled. The composition is then decanted, dried and granulated. The composition is then formed into the shape of the desired component by hot pressing in a graphite die. A heat treatment process may also be applied after hot pressing to further improve erosion resistance by crystallizing amorphous grain boundary phases to provide a ceramic component having sand erosion characteristics superior to electro-formed nickel. The component provides a dielectric constant which is much lower than the dielectric constant of an electro-formed nickel component. The erosion resistant ceramic components are particularly applicable to leading edge components of main rotor blades, however, erosion protection of tail rotor blades, engine propellers, turbine blades, and other such components where high levels of erosion protection, and a low dielectric constant are desired will also benefit.

    摘要翻译： 耐磨陶瓷成分由氮氧化硅前体粉末与烧结助剂合成。 将烧结助剂，优选氧化铝和/或氧化镥加入到氮氧化硅前体粉末中并进行球磨。 然后将组合物倾析，干燥并造粒。 然后通过在石墨模具中热压将组合物形成为所需组分的形状。 也可以在热压后进行热处理，通过结晶非晶质晶界相进一步提高抗侵蚀性，提供具有优于电铸镍的砂蚀特性的陶瓷成分。 该组分提供的电介质常数远小于电成镍组分的介电常数。 耐腐蚀陶瓷部件特别适用于主转子叶片的前缘部件，然而，对于需要高水平的侵蚀保护和低介电常数的尾旋翼叶片，发动机螺旋桨，涡轮机叶片和其它这些部件的侵蚀保护 也将受益。