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    CERAMIC MATRIX COMPOSITE MEMBER
    5.
    发明申请
    CERAMIC MATRIX COMPOSITE MEMBER 有权

    公开(公告)号：US20210245460A1

    公开(公告)日：2021-08-12

    申请号：US17245706

    申请日：2021-04-30

    申请人： MITSUBISHI HEAVY INDUSTRIES, LTD.

    发明人： Masahiko Mega ,  Takayuki Kurimura ,  Taiji Torigoe ,  Mineaki Matsumoto

    IPC分类号： B29C73/24 ,  B29C73/04 ,  B29C73/26 ,  C04B41/00 ,  C04B35/76 ,  C04B41/52 ,  C04B41/89 ,  C04B35/80 ,  C04B35/626

    摘要： A ceramic matrix composite member including a ceramic matrix composite reinforced by ceramic fiber, includes a body portion and a joint portion joined integrally to the body portion, the joint portion occupying a part of a surface of the ceramic matrix composite member, wherein the body portion includes at least one hole extending toward an inside of the body portion from a boundary surface between the body portion and the joint portion, and the at least one hole is filled with a matrix of the ceramic matrix composite, wherein the body portion includes a first region where a density of the ceramic fiber is relatively high and a second region where the density of the ceramic fiber is lower than that in the first region, and wherein the at least one hole exists so as to cut off a part of bundles of the ceramic fiber in the second region.

    Method to process a ceramic matrix composite (CMC) with a protective ceramic coating
    8.
    发明授权
    Method to process a ceramic matrix composite (CMC) with a protective ceramic coating 有权

    公开(公告)号：US11001532B2

    公开(公告)日：2021-05-11

    申请号：US15956097

    申请日：2018-04-18

    申请人： Rolls-Royce High Temperature Composites Inc.

    发明人： Sungbo Shim

    IPC分类号： C04B35/80 ,  C04B41/00 ,  C04B41/89 ,  C04B35/573 ,  C04B41/52 ,  C04B35/571 ,  C04B35/565 ,  C04B35/76 ,  C04B38/06 ,  B32B18/00

    摘要： A method of producing a ceramic matrix composite including a protective ceramic coating thereon comprises applying a surface slurry onto an outer surface of an impregnated fiber preform. The surface slurry includes particulate ceramic solids dispersed in a flowable preceramic polymer comprising silicon, and the impregnated fiber preform comprises a framework of ceramic fibers loaded with particulate matter. The flowable preceramic polymer is cured, thereby forming on the outer surface a composite layer comprising a cured preceramic polymer with the particulate ceramic solids dispersed therein. The cured preceramic polymer is then pyrolyzed to form a porous ceramic layer comprising silicon carbide, and the impregnated fiber preform and the porous ceramic layer are infiltrated with a molten material comprising silicon. After infiltration, the molten material is cooled to form a ceramic matrix composite body with a protective ceramic coating thereon.

    High strength ceramic fibers and methods of fabrication
    9.
    发明授权
    High strength ceramic fibers and methods of fabrication 有权

    公开(公告)号：US10882749B2

    公开(公告)日：2021-01-05

    申请号：US16101730

    申请日：2018-08-13

    申请人： FREE FORM FIBERS, LLC

    发明人： Joseph Pegna ,  John L. Schneiter ,  Kirk L. Williams ,  Ramkiran Goduguchinta

    IPC分类号： C01B32/956 ,  C04B35/565 ,  C04B35/628 ,  C04B35/80 ,  D01F9/08 ,  C04B35/76

    摘要： A method and apparatus for forming a plurality of fibers from (e.g., CVD) precursors, including a reactor adapted to grow a plurality of individual fibers; and a plurality of independently controllable lasers, each laser of the plurality of lasers growing a respective fiber. A high performance fiber (HPF) structure, including a plurality of fibers arranged in the structure; a matrix disposed between the fibers; wherein a multilayer coating is provided along the surfaces of at least some of the fibers with an inner layer region having a sheet-like strength; and an outer layer region, having a particle-like strength, such that any cracks propagating toward the outer layer from the matrix propagate along the outer layer and back into the matrix, thereby preventing the cracks from approaching the fibers. A method of forming an interphase in a ceramic matrix composite material having a plurality of SiC fibers, which maximizes toughness by minimizing fiber to fiber bridging, including arranging a plurality of SiC fibers into a preform; selectively removing (e.g., etching) silicon out of the surface of the fibers resulting in a porous carbon layer on the fibers; and replacing the porous carbon layer with an interphase layer (e.g., Boron Nitride), which coats the fibers to thereby minimize fiber to fiber bridging in the preform.