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    HOMOGENEOUS COMPOSITE MICROSTRUCTURE
    12.
    发明申请
    HOMOGENEOUS COMPOSITE MICROSTRUCTURE 有权

    公开(公告)号：US20230019485A1

    公开(公告)日：2023-01-19

    申请号：US17375572

    申请日：2021-07-14

    Applicant: Raytheon Technologies Corporation

    Inventor： Olivier H. Sudre ,  Kathryn S. Read

    IPC: C04B35/80 ,  B28B23/00 ,  D03D3/00 ,  C04B35/628 ,  C04B35/634

    Abstract: A method of preparing a woven ceramic fabric for use in a ceramic matrix composite includes transforming a woven fabric sheet having a first tow architecture into a separated woven fabric sheet having a second tow architecture, the first tow architecture including a plurality of warp tows and a plurality of weft tows, and the second tow architecture including a plurality of warp subtows and/or a plurality of weft subtows. Transforming the woven fabric sheet includes separating at least some of the plurality of warp tows and/or the plurality of weft tows into a greater number of corresponding warp subtows and/or weft subtows, respectively, such that second tow architecture includes more warp subtows and/or weft subtows than the first tow architecture comprises warp tows and weft tows, and wherein each of the warp subtows and/or weft subtows includes fewer filaments than corresponding warp tow and/or weft tow. Each of the plurality of warp subtows and/or weft subtows is spaced apart from the closest adjacent warp subtow and/or weft subtow, respectively, a distance of 25 to 230 microns.

    CMC laminate airfoil with ply drops
    15.
    发明授权
    CMC laminate airfoil with ply drops 有权

    公开(公告)号：US12044145B2

    公开(公告)日：2024-07-23

    申请号：US18319586

    申请日：2023-05-18

    Applicant: RAYTHEON TECHNOLOGIES CORPORATION

    Inventor： Russell Kim ,  Howard J. Liles ,  Kathryn S. Read

    IPC: F01D5/28 ,  F01D5/14

    CPC classification number: F01D5/282 ,  F01D5/147 ,  F01D5/284 ,  F05D2300/6012 ,  F05D2300/6033 ,  F05D2300/6034

    Abstract: An airfoil includes an airfoil section that has an airfoil wall that circumscribes an internal airfoil cavity and defines leading and trailing ends and pressure and suction sides. The airfoil wall is formed of a ceramic matrix composite (CMC) laminate comprised of fiber plies disposed in a ceramic matrix. The fiber plies include a skin fiber ply that defines an exterior of the airfoil section and at least one inner fiber ply that lines the skin fiber ply. At least one inner fiber ply locally terminates at one of the leading end or the trailing end such that the airfoil wall has fewer of the fiber plies in the leading end or the trailing end than in each of the pressure side and the suction side.

    AIRFOIL WITH WISHBONE FIBER STRUCTURE
    20.
    发明申请
    AIRFOIL WITH WISHBONE FIBER STRUCTURE 有权

    公开(公告)号：US20220228496A1

    公开(公告)日：2022-07-21

    申请号：US17149944

    申请日：2021-01-15

    Applicant: RAYTHEON TECHNOLOGIES CORPORATION

    Inventor： Jonas S. Banhos ,  Kathryn S. Read ,  Raymond Surace ,  Olivier H. Sudre

    IPC: F01D5/28 ,  F01D5/18 ,  F01D5/14

    Abstract: An airfoil includes an airfoil wall that defines a leading end, a trailing end, and pressure and suction sides that join the leading end and the trailing end. The airfoil wall includes a wishbone-shaped fiber layer structure that has a pair of arms that merge into a single leg. The pair of arms are formed by first and second S-shaped fiber layers each of which is comprised of a network of fiber tows. The first and second S-shaped fiber layers merge to form the single leg. The single leg comprises fiber tows from each of the first and second S-shaped fiber layers that are interwoven, and the single leg forms at least a portion of the trailing end of the airfoil wall.

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