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    CERAMIC MATRIX COMPOSITES HAVING MONOMODAL PORE SIZE DISTRIBUTION AND LOW FIBER VOLUME FRACTION
    1.
    发明申请
    CERAMIC MATRIX COMPOSITES HAVING MONOMODAL PORE SIZE DISTRIBUTION AND LOW FIBER VOLUME FRACTION 审中-公开

    公开(公告)号：US20180093926A1

    公开(公告)日：2018-04-05

    申请号：US15831896

    申请日：2017-12-05

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Gregory Scot CORMAN ,  Jared Hogg WEAVER ,  Krishan Lal LUTHRA

    IPC分类号： C04B35/76 ,  F01D5/28 ,  C04B38/06 ,  F01D9/02 ,  C04B35/626 ,  C04B35/80

    摘要： Ceramic matrix composite articles include, for example, a plurality of unidirectional arrays of fiber tows in a matrix having a monomodal pore size distribution, and a fiber volume fraction between about 15 percent and about 35 percent. The articles may be formed by, for example, providing a shaped preform comprising a prepreg tape layup of unidirectional arrays of fiber tows, a matrix precursor, and a pore former, curing the shaped preform to pyrolyze the matrix precursor and burnout the pore former so that the shaped preform comprises the unidirectional arrays of fiber tows and a porous matrix having a monomodal pore size distribution, and subjecting the cured shaped preform to chemical vapor infiltration to densify the porous matrix so that the ceramic matrix composite article has a fiber volume fraction between about 15 percent and about 35 percent.

    METHODS AND SYSTEMS FOR REDUCING SILICA RECESSION IN SILICON-CONTAINING MATERIALS
    2.
    发明申请
    METHODS AND SYSTEMS FOR REDUCING SILICA RECESSION IN SILICON-CONTAINING MATERIALS 有权
    用于减少含硅材料中二氧化硅含量的方法和系统

    公开(公告)号：US20140165419A1

    公开(公告)日：2014-06-19

    申请号：US13717773

    申请日：2012-12-18

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Krishan Lal LUTHRA

    IPC分类号： F26B23/02

    CPC分类号： F26B23/02 ,  C04B41/009 ,  C04B41/4519 ,  C04B41/80 ,  F01D5/28 ,  F01D5/288 ,  F02C6/08 ,  F02C7/18 ,  F23R3/007 ,  C04B35/565 ,  C04B35/806 ,  C04B35/584 ,  C04B35/58085

    摘要： The present disclosure relates to methods and systems for reducing silica recession of silicon-containing ceramics or silicon-containing ceramic composites, particularly those exposed to a combustion gas or to combustion gas environments, including those exposed to high temperature combustion gas environments. The methods and systems involve silicon-doping of compressed air and/or removal of moisture from compressed air prior to co-mingling the treated compressed air with the combustion gas to which the silicon-containing ceramics or silicon-containing ceramic composites are exposed.

    摘要翻译： 本公开内容涉及用于减少含硅陶瓷或含硅陶瓷复合材料的二氧化硅凹陷的方法和系统，特别是暴露于燃烧气体或燃烧气体环境中的那些，包括暴露于高温燃烧气体环境的那些。 在将经处理的压缩空气与含硅陶瓷或含硅陶瓷复合材料暴露于其中的燃烧气体共混之前，该方法和系统涉及压缩空气的硅掺杂和/或从压缩空气中去除水分。

    HIGH TEMPERATURE TOLERANT CERAMIC MATRIX COMPOSITES AND ENVIRONMENTAL BARRIER COATINGS
    8.
    发明申请
    HIGH TEMPERATURE TOLERANT CERAMIC MATRIX COMPOSITES AND ENVIRONMENTAL BARRIER COATINGS 审中-公开
    高温耐火陶瓷基复合材料和环境阻隔涂料

    公开(公告)号：US20160017749A1

    公开(公告)日：2016-01-21

    申请号：US14772883

    申请日：2014-03-04

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Krishan Lal LUTHRA ,  Don M. LIPKIN ,  Julin WAN

    IPC分类号： F01D25/00 ,  C04B35/565

    摘要： High-temperature machine components, more particularly, articles capable of operating in high-temperature environments, including for example turbines of gas engines, may be formed of a high temperature ceramic matrix composite that includes a ceramic substrate including silicon; an environmental harrier coating system including a silicon containing bond coat; and a diffusion barrier layer of a carbide or a nitride between the substrate of the article and the silicon bond coat of the environmental barrier coating system. The diffusion harrier layer selectively prevents or reduces the diffusion of boron and impurities from the substrate to the bond coat of the environmental barrier coating system.

    摘要翻译： 高温机器部件，更具体地，能够在高温环境中操作的制品，包括例如燃气发动机的涡轮机，可以由包括包括硅的陶瓷基板的高温陶瓷基体复合材料形成; 包括含硅粘结涂层的环境覆盖系统; 以及物品的基板与环境保护涂覆系统的硅键合层之间的碳化物或氮化物的扩散阻挡层。 扩散阻挡层选择性地防止或减少硼和杂质从衬底到环境屏障涂层系统的粘结层的扩散。