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    HIGH STRENGTH CERAMIC FIBERS AND METHODS OF FABRICATION
    7.
    发明申请
    HIGH STRENGTH CERAMIC FIBERS AND METHODS OF FABRICATION 审中-公开
    高强度陶瓷纤维和制造方法

    公开(公告)号：US20150004393A1

    公开(公告)日：2015-01-01

    申请号：US14372085

    申请日：2013-01-18

    申请人： FREE FORM FIBERS, LLC

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

    IPC分类号： C04B35/76 ,  C04B41/50 ,  C01B31/36 ,  D01F9/08

    CPC分类号： C04B35/76 ,  C01B32/956 ,  C04B35/565 ,  C04B35/62865 ,  C04B35/62868 ,  C04B35/62873 ,  C04B35/806 ,  C04B2235/3409 ,  C04B2235/5244 ,  C04B2235/5264 ,  C04B2235/616 ,  D01F9/08 ,  D10B2101/16 ,  Y10T428/249964

    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.

    摘要翻译： 一种从（例如CVD）前体形成多根纤维的方法和装置，包括适于生长多根单独纤维的反应器; 和多个可独立控制的激光器，所述多个激光器的每个激光器生长相应的光纤。 一种高性能纤维（HPF）结构，包括布置在结构中的多根纤维; 设置在纤维之间的矩阵; 其中沿着至少一些所述纤维的表面设置有具有片状强度的内层区域的多层涂层; 以及具有粒状强度的外层区域，使得从基体向外层传播的任何裂纹沿外层传播并返回到基体中，从而防止裂纹接近纤维。 在具有多个SiC纤维的陶瓷基复合材料中形成界面的方法，其通过使纤维与纤维桥接最小化而使韧性最大化，包括将多个SiC纤维布置在预成型体中; 选择性地从硅纤维表面去除（例如蚀刻）硅，导致纤维上的多孔碳层; 并用间隙层（例如，氮化硼）代替多孔碳层，其涂覆纤维，从而使纤维与预制棒中的纤维桥接最小化。

    High strength ceramic fibers and methods of fabrication
    8.
    发明授权
    High strength ceramic fibers and methods of fabrication 有权

    公开(公告)号：US10822240B2

    公开(公告)日：2020-11-03

    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.