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    Ceramic composites having a weak bond material selected from monazites and xenotimes
    12.
    发明授权
    Ceramic composites having a weak bond material selected from monazites and xenotimes 失效
    具有选自独居石和不定时的弱键材料的陶瓷复合材料

    公开(公告)号：US5514474A

    公开(公告)日：1996-05-07

    申请号：US424767

    申请日：1995-04-19

    申请人： Peter E. D. Morgan ,  David B. Marshall

    发明人： Peter E. D. Morgan ,  David B. Marshall

    IPC分类号： B32B18/00 ,  C04B35/00 ,  C04B35/10 ,  C04B35/447 ,  C04B35/80 ,  B32B9/04 ,  B32B19/00

    CPC分类号： C04B35/447 ,  C04B35/803 ,  Y10S428/902 ,  Y10T428/2933 ,  Y10T428/2938

    摘要： Thermodynamically stable ceramic composites are provided for use in high temperature oxidizing environments. A phosphate selected from monazites and xenotimes functions as a weak bond interphase material between the constituents of the composites. Monazite comprises a family of minerals having the form MPO.sub.4, where M is selected from the larger trivalent rare earth elements of the lanthanide series (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, and Tb) and coupled substituted divalents and tetravalents such as Ca or Sr with Zr or Th. Xenotimes are phosphates similar to monazite where M is selected from Sc, Y, and the smaller trivalent rare earth elements of the lanthanide series (Dy, Ho, Er, Tm, Yb, and Lu). High temperature ceramic composites that include monazite or xenotime and exhibit damage tolerant behavior or non-catastrophic fracture may be fabricated in a variety of material systems and reinforcement morphologies, including multilayered laminar composites; fiber, whisker, and particulate reinforced composites; and hybrid laminar composites. Alumina fibers may be used in single crystal or polycrystalline form as a reinforcement material. In preferred embodiments, the ceramic matrix comprises a material similar to the reinforcement to improve compatibility of the composite materials. The interphase material allows debonding and "frictional" sliding between the constituents of the composite and inhibits crack growth across the interface.

    摘要翻译： 提供热力学稳定的陶瓷复合材料用于高温氧化环境。 选自独居石和异氰酸酯的磷酸盐在复合材料的组分之间用作弱键相间材料。 独居石包括具有MPO4形式的矿物族，其中M选自镧系（La，Ce，Pr，Nd，Pm，Sm，Eu，Gd和Tb）的较大的三价稀土元素和偶联的取代的二价 和四价体如Ca或Sr与Zr或Th。 Xenotimes是类似于独居石的磷酸盐，其中M选自Sc，Y，以及镧系（Dy，Ho，Er，Tm，Yb和Lu）中较小的三价稀土元素。 包括独居石或堇青石并具有损伤容忍行为或非灾难性断裂的高温陶瓷复合材料可以在各种材料体系和增强形态中制造，包括多层层状复合材料; 纤维，晶须和颗粒增强复合材料; 和混合层流复合材料。 氧化铝纤维可以单晶或多晶形式用作增强材料。 在优选的实施方案中，陶瓷基质包括类似于增强材料以改善复合材料的相容性的材料。 相间材料允许在复合材料的组分之间脱粘和“摩擦”滑动并且抑制在界面上的裂纹增长。

    S-parameter measurement system for wideband non-linear networks
    13.
    发明授权
    S-parameter measurement system for wideband non-linear networks 失效
    宽带非线性网络的S参数测量系统

    公开(公告)号：US06594604B2

    公开(公告)日：2003-07-15

    申请号：US09783912

    申请日：2001-02-14

    申请人： Donald M. Metzger ,  David B. Marshall ,  Curtis C. Hainds

    发明人： Donald M. Metzger ,  David B. Marshall ,  Curtis C. Hainds

    IPC分类号： G01C1900

    CPC分类号： G01R31/2822 ,  G01R27/28 ,  G01R35/005

    摘要： A system for determining scattering parameters (S-parameters) characterizing the behavior of a network applies a wideband stimulus signal containing multiple signal components as input to the network. The system then measures incident and reflected waveforms at all of the network's ports, digitizes and converts the measured waveforms from time domain to frequency domain data, and then computes the S-parameters values for each frequency component of interest from the frequency domain data for that frequency. The system also determines its own error coefficients (E-coefficients) for each frequency of interest from data collected during a sequence of measurements in response to either a sinusoid or a wideband signal and adjusts the computed S-parameter values accordingly.

    摘要翻译： 用于确定表征网络行为的散射参数（S参数）的系统将包含多个信号分量的宽带激励信号作为对网络的输入。 该系统然后测量所有网络端口的入射和反射波形，将测量的波形从时域数字化并转换为频域数据，然后从频域数据中计算感兴趣的每个频率分量的S参数值 频率。 系统还根据响应于正弦波或宽带信号的测量序列期间收集的数据，确定每个感兴趣频率的自己的误差系数（E系数），并相应调整计算出的S参数值。

    High temperature ceramic composites
    15.
    发明授权
    High temperature ceramic composites 失效
    高温陶瓷复合材料

    公开(公告)号：US5137852A

    公开(公告)日：1992-08-11

    申请号：US639857

    申请日：1991-01-11

    申请人： Peter E. D. Morgan ,  David B. Marshall

    发明人： Peter E. D. Morgan ,  David B. Marshall

    IPC分类号： C04B35/10 ,  C04B35/111 ,  C04B35/113 ,  C04B35/44 ,  C04B35/443 ,  C04B35/486 ,  C04B35/80

    CPC分类号： C04B35/443 ,  C04B35/111 ,  C04B35/113 ,  C04B35/44 ,  C04B35/486 ,  C04B35/803 ,  Y10T428/2916 ,  Y10T428/2924 ,  Y10T428/2938

    摘要： Thermodynamically stable ceramic composites are provided for use in high temperature oxidizing environments. The composites comprise high strength alumina fibers (Al.sub.2 O.sub.3) in a ceramic matrix. The ceramic matrix comprises material similar to the fibers to improve compatibility of the composite materials. A material selected from the .beta.-alumina and magnetoplumbite family of materials is used to provide a weakly bonded interface between the fibers and the ceramic matrix. .beta.-aluminas and magnetoplumbites have weak layers as an intrinsic characteristic of their crystal structure, which comprise spinel layers (basically Al.sub.2 O.sub.3) separated by very weakly bonded planes containing the .beta.-forming ions. The weak planes of these materials allow preferential debonding and sliding, and thus inhibit crack growth across the interface between the fibers and the ceramic matrix. The alumina fibers can be coated with .beta.-alumina by any of several methods such as heat treating the fibers in an atmosphere containing the desired .beta.-forming ions. Composite structures can be fabricated by placing the coated fibers in powdered matrix material and hot pressing. .beta.-alumina can also be formed in situ within a preformed composite by providing the .beta.-forming ions in a compound that is phase compatible with the ceramic matrix material and then heat treating the composite to form .beta.-alumina at the fiber-matrix interface.

    Monazite-based thermal barrier coatings
    18.
    发明授权
    Monazite-based thermal barrier coatings 有权
    独居石型热障涂层

    公开(公告)号：US06863999B1

    公开(公告)日：2005-03-08

    申请号：US10057184

    申请日：2002-01-23

    申请人： Olivier H. Sudre ,  David B. Marshall ,  Peter E. D. Morgan

    发明人： Olivier H. Sudre ,  David B. Marshall ,  Peter E. D. Morgan

    IPC分类号： B32B9/06 ,  C23C28/00 ,  C23C28/04 ,  F01D5/28 ,  F03B3/12

    CPC分类号： F01D5/288 ,  C23C28/04 ,  C23C28/042 ,  C23C28/048

    摘要： Monazites and xenotimes are rare-earth phosphates showing a combination of properties expected to be suitable for thermal barrier coatings. For example, lanthanum phosphate (La-monazite) can be used to form thermal barrier coatings to protect superalloy and ceramic parts exposed to high temperature and damage by sulfur, vanadium, phosphorus and other contaminants. The monazite or xenotime coatings can be applied using any of the common application methods including EB-PVD, laser ablation and plasma spraying. The stoichiometry of the coatings can be modulated according to the stoichiometry of specially prepared starting target (source) material. The most effective coatings appear to be largely crystalline and show a columnar structure with feather-like microstructure. For La-monazite, effective coatings between 10 and 500 micrometers in thickness can be deposited on substrates having temperatures between about 750° C. and about 950° C.

    摘要翻译： 独居石和异味是稀土磷酸盐，显示出预期适用于热障涂层的性能组合。 例如，可以使用磷酸镧（La-monazite）形成热障涂层，以保护暴露于高温的高温合金和陶瓷部件，并受到硫，钒，磷和其他污染物的损害。 可以使用任何常见的应用方法（包括EB-PVD，激光烧蚀和等离子体喷涂）来应用独居石或含钇矿涂层。 涂层的化学计量可以根据专门制备的起始靶（源）材料的化学计量来调节。 最有效的涂层看起来很大程度上是结晶的，并且显示出具有羽状微结构的柱状结构。 对于独立For石，厚度为10至500微米的有效涂层可以沉积在温度在约750℃至约950℃之间的基底上。

    Fibrous composites including monazites and xenotimes
    20.
    发明授权
    Fibrous composites including monazites and xenotimes 失效
    纤维复合材料包括独居石和异型材

    公开(公告)号：US5665463A

    公开(公告)日：1997-09-09

    申请号：US592155

    申请日：1996-01-26

    申请人： Peter E. D. Morgan ,  David B. Marshall

    发明人： Peter E. D. Morgan ,  David B. Marshall

    IPC分类号： C04B35/447 ,  C04B35/80 ,  B32B7/00

    CPC分类号： C04B35/447 ,  C04B35/803 ,  Y10T428/2933 ,  Y10T428/294 ,  Y10T428/2958 ,  Y10T442/2361 ,  Y10T442/2975 ,  Y10T442/3659 ,  Y10T442/488 ,  Y10T442/67

    摘要： Thermodynamically stable ceramic composites are provided for use in high temperature reactive environments. A phosphate selected from monazites and xenotimes functions as a weak bond material in the composite. Monazite comprises a family of minerals having the form MPO.sub.4, where M is selected from the larger trivalent rare earth elements of the lanthanide series (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, and Tb) and coupled substituted divalents and tetravalents such as Ca or Sr with Zr or Th. Xenotimes are phosphates similar to monazite where M is selected from Sc, Y, and the smaller trivalent rare earth elements of the lanthanide series (Dy, Ho, Er, Tm, Yb, and Lu). High temperature ceramic composites that include monazite or xenotime and exhibit damage tolerant behavior or non-catastrophic fracture may be fabricated in a variety of material systems and reinforcement morphologies, including multilayered laminar composites; fiber, whisker, and particulate reinforced composites; hybrid laminar composites; and fabric or fiber preform composites. In preferred embodiments, the ceramic matrix comprises a material similar to the reinforcement to improve compatibility of the composite materials. The weak bond material allows debonding and "frictional" sliding between the constituents of the composite and inhibits crack growth across the interface.

    摘要翻译： 提供热力学稳定的陶瓷复合材料用于高温反应性环境。 选自独居石和硝酸盐的磷酸盐在复合材料中起到弱键材料的作用。 独居石包括具有MPO4形式的矿物族，其中M选自镧系（La，Ce，Pr，Nd，Pm，Sm，Eu，Gd和Tb）的较大的三价稀土元素和偶联的取代的二价 和四价体如Ca或Sr与Zr或Th。 Xenotimes是类似于独居石的磷酸盐，其中M选自Sc，Y，以及镧系（Dy，Ho，Er，Tm，Yb和Lu）中较小的三价稀土元素。 包括独居石或堇青石并具有损伤容忍行为或非灾难性断裂的高温陶瓷复合材料可以在各种材料体系和增强形态中制造，包括多层层状复合材料; 纤维，晶须和颗粒增强复合材料; 混合层流复合材料; 织物或纤维预制件复合材料。 在优选的实施方案中，陶瓷基质包括类似于增强材料以改善复合材料的相容性的材料。 弱粘合材料允许复合材料的组分之间的剥离和“摩擦”滑动并且抑制在界面上的裂纹扩展。