Abradable CMC stacked laminate ring segment for a gas turbine
    71.
    发明授权
    Abradable CMC stacked laminate ring segment for a gas turbine 有权
    用于燃气轮机的可堆叠的CMC堆叠层压环段

    公开(公告)号:US07819625B2

    公开(公告)日:2010-10-26

    申请号:US11800787

    申请日:2007-05-07

    IPC分类号: F01D11/08

    CPC分类号: F01D9/06 F01D11/122

    摘要: A pattern of depressions (36) in a sealing surface (34) on a CMC wall (32) of gas turbine ring segment (30) allows minimum clearance against turbine blades tips, and thus maximizes working gas sealing. An array of depressions (36) on the surface (34) increases abradability of the surface (34) by blade tip contact during zero clearance conditions and reduces blade tip damage. The depressions (36) are unconnected, preventing bypass of the working gas around the blade tips. A desired abradable surface geometry may be formed in a stacked laminate wall construction (40-43, 52) by staggered laminate edge profiles (50, 52) or by machining of depressions (36, 54) after construction.

    摘要翻译: 在燃气轮机环段(30)的CMC壁(32)上的密封表面(34)中的凹陷(36)的图案允许对涡轮叶片尖端的最小间隙,从而使工作气体密封最大化。 在零间隙条件下,表面(34)上的凹陷(36)的阵列通过叶片尖端接触增加了表面(34)的耐磨性,并且减少了叶片尖端损伤。 凹陷(36)是未连接的,防止围绕叶片尖端的工作气体旁路。 期望的可磨损表面几何形状可以通过交错的层压边缘轮廓(50,52)或通过在构造之后机械加工凹陷(36,54)而形成在堆叠的层叠壁结构(40-43,52)中。

    Formation of Imprints and Methodology for Strengthening a Surface Bond in a Hybrid Ceramic Matrix Composite Structure
    73.
    发明申请
    Formation of Imprints and Methodology for Strengthening a Surface Bond in a Hybrid Ceramic Matrix Composite Structure 审中-公开
    形成用于加强混合陶瓷基体复合结构中表面键合的印记和方法

    公开(公告)号:US20100080953A1

    公开(公告)日:2010-04-01

    申请号:US12238897

    申请日:2008-09-26

    IPC分类号: B32B3/12 B05D3/12

    摘要: A hybrid ceramic matrix composite structure and method for fabricating such an structure are provided. A ceramic matrix composite substrate 12 includes a plurality of layers of ceramic fibers. A plurality of spaced apart imprints 22 is disposed in at least one of the plurality of layers. An outer surface of a subsequent layer disposed over the layer with the imprints to influence a texture of the outer surface of the substrate by defining a plurality of indent regions 32 on the outer surface of the substrate. A ceramic coating 14 is deposited on the surface of the substrate. The plurality of indent regions 32 constitutes a bond-enhancing arrangement between the surface of the substrate and a corresponding boundary of the coating.

    摘要翻译: 提供了一种用于制造这种结构的混合陶瓷基体复合结构和方法。 陶瓷基复合基板12包括多层陶瓷纤维。 多个间隔开的印记22设置在多个层中的至少一个层中。 通过在衬底的外表面上限定多个凹陷区域32,设置在具有印记的层上的后续层的外表面以影响衬底的外表面的纹理。 陶瓷涂层14沉积在基板的表面上。 多个凹口区域32构成了衬底的表面和涂层的相应边界之间的粘结增强布置。

    Patterned reduction of surface area for abradability
    77.
    发明授权
    Patterned reduction of surface area for abradability 有权
    图形化的表面积减少磨损性

    公开(公告)号:US09297269B2

    公开(公告)日:2016-03-29

    申请号:US11800801

    申请日:2007-05-07

    IPC分类号: B32B3/30 F01D11/12

    摘要: A gas turbine component (20) with a layer of ceramic material (22) defining a wear surface (21), in which an array of cross-shaped depressions (26A, 26B) formed in the wear surface (21) define a continuous labyrinth of orthogonal walls (28, 30) of the ceramic material, and reduce the area of the wear surface (21) by about 50%. Within a representative area (36) of the wear surface (21), the depressions (26A, 26B) provide a ratio of a lineal sum of depression perimeters (27) divided by the representative area (36) of the wear surface of least 0.9 per unit of measurement for improved abradability characteristics of the wear surface (21).

    摘要翻译: 一种具有限定磨损表面(21)的陶瓷材料层(22)的燃气轮机部件(20),其中形成在磨损表面(21)中的十字形凹陷阵列(26A,26B)限定了连续的迷宫 的陶瓷材料的正交壁(28,30),并且将磨损表面(21)的面积减小约50%。 在磨损表面(21)的代表区域(36)内,凹陷(26A,26B)提供凹陷周长(27)的直线和除以磨损表面的代表区域(36)的比率为至少0.9 每单位测量以改善磨损表面(21)的耐磨特性。

    Method of joining ceramic parts and articles so formed
    79.
    发明授权
    Method of joining ceramic parts and articles so formed 有权
    陶瓷部件和如此形成的制品的接合方法

    公开(公告)号:US09068464B2

    公开(公告)日:2015-06-30

    申请号:US11188406

    申请日:2005-07-25

    摘要: A method for joining a first CMC part (30) having an outer joining portion (32), and a second CMC part (36) having an inner joining portion (38). The second CMC part (36) is heat-cured to a stage of shrinkage more complete than that of the first CMC part (30) prior to joining. The two CMC parts (30, 36) are joined in a mating interface that captures the inner joining portion (38) within the outer joining portion (32). The assembled parts (30, 36) are then fired together, resulting in differential shrinkage that compresses the outer joining portion (32) onto the inner joining portion (38), providing a tightly pre-stressed joint. Optionally, a refractory adhesive (42) may be used in the joint. Shrinkage of the outer joining portion (32) avoids shrinkage cracks in the adhesive (42).

    摘要翻译: 一种用于接合具有外接合部分(32)的第一CMC部件(30)和具有内接合部分(38)的第二CMC部件(36)的方法。 第二CMC部分(36)在接合之前被热固化到比第一CMC部分(30)的收缩阶段更完整的阶段。 两个CMC部件(30,36)连接在捕获外接合部分(32)内的内接合部分(38)的配合接口中。 然后将组装好的部件(30,36)烧结在一起,导致不均匀的收缩,将外部接合部分(32)压缩到内部接合部分(38)上,从而提供紧密的预应力接头。 可选地,可以在接头中使用耐火粘合剂(42)。 外接合部分(32)的收缩避免了粘合剂(42)中的收缩裂纹。