公开(公告)号：US06979490B2

公开(公告)日：2005-12-27

申请号：US10261475

申请日：2002-09-30

Applicant: Wayne S. Steffier

Inventor： Wayne S. Steffier

IPC: B32B17/12 ,  B32B18/00 ,  B32B27/04 ,  C04B35/565 ,  C04B35/628 ,  C04B35/80 ,  D04H1/00 ,  D04H1/42 ,  D04H3/00 ,  D04H13/00

CPC classification number: B32B18/00 ,  C04B35/565 ,  C04B35/62868 ,  C04B35/62873 ,  C04B35/62884 ,  C04B35/62894 ,  C04B35/62897 ,  C04B35/806 ,  C04B2235/428 ,  C04B2235/5244 ,  C04B2235/5256 ,  C04B2235/5268 ,  C04B2235/614 ,  C04B2235/77 ,  C04B2235/80 ,  C04B2235/96 ,  C04B2237/361 ,  C04B2237/363 ,  C04B2237/365 ,  C04B2237/368 ,  C04B2237/38 ,  D04H1/42 ,  Y10T428/249924 ,  Y10T428/249928 ,  Y10T428/24993 ,  Y10T428/249931 ,  Y10T428/24994 ,  Y10T428/249945 ,  Y10T428/2918 ,  Y10T428/2933 ,  Y10T428/2938

Abstract: A fiber-reinforced ceramic matrix composite material exhibiting increased matrix cracking strength and fracture toughness is produced by sequentially depositing a plurality of 5-500 nanometer-thick layers of a primary ceramic matrix material phase periodically separated by 1-100 nanometer-thick intermediate layers of a secondary matrix material phase onto the reinforcing fibers upon their consolidation. The resultant nanolayered matrix enhances the resistance to the onset of matrix cracking, thus increasing the useful design strength of the ceramic matrix composite material. The nanolayered microstructure of the matrix constituent also provides a unique resistance to matrix crack propagation. Through extensive inter-layer matrix fracture, debonding and slip, internal matrix microcracks are effectively diverted and/or blunted prior to their approach towards the reinforcing fiber, thus increasing the apparent toughness of the matrix constituent. This unique toughening mechanism serves to dampen energetic co-planar macrocrack propagation typically observed in conventionally manufactured ceramic matrix composites wherein matrix cracks are usually deflected at the fiber/matrix interphase region.

Abstract translation: 表现出增加的基体裂解强度和断裂韧性的纤维增强陶瓷基复合材料是通过依次沉积多个5-500纳米厚的初级陶瓷基体材料相，其中第一陶瓷基体材料相周期性地被1-100纳米厚的中间层 次级基质材料相在其固结时在增强纤维上。 所得的纳米基体增强了基体开裂的抗性，从而增加了陶瓷基复合材料的有用设计强度。 基体组分的纳米层状微结构也提供了对基体裂纹扩展的独特的抗性。 通过广泛的层间基体断裂，剥离和滑动，内部基体微裂纹在进入增强纤维之前有效地转向和/或钝化，从而增加基体成分的表观韧性。 这种独特的增韧机理用于抑制通常在常规制造的陶瓷基质复合材料中观察到的能量共面的宏观裂纹扩展，其中基体裂纹通常在纤维/基质相间区域被偏转。

公开(公告)号：US06783824B2

公开(公告)日：2004-08-31

申请号：US10039991

申请日：2002-01-08

Applicant: Wayne S. Steffier

Inventor： Wayne S. Steffier

IPC: F02K964

CPC classification number: B23P15/008 ,  F02K9/64 ,  F28D7/0041 ,  F28F21/04 ,  Y10T428/13 ,  Y10T428/131 ,  Y10T428/1314

Abstract: An actively-cooled, fiber-reinforced ceramic matrix composite thrust chamber for liquid rocket propulsion systems is designed and produced with internal cooling channels. The monocoque tubular structure consists of an inner wall, which is fully integrated to an outer wall via radial coupling webs. Segmented annular void spaces between the inner wall, outer wall and adjoining radial webs form the internal trapezoidal-shaped cooling channel passages of the tubular heat exchanger. The manufacturing method enables producing any general tubular shell geometry ranging from simple cylindrical heat exchanger tubes to complex converging-diverging, Delaval-type nozzle structures with an annular array of internal cooling channels. The manufacturing method allows for transitioning the tubular shell structure from a two-dimensional circular geometry to a three-dimensional rectangular geometry. The method offers the flexibility of producing internal cooling channels of either constant or continuously variable cross-sectional area, in addition to orienting the cooling channels either axially, helically or sinusoidally (e.g., undulating) with respect to the longitudinal axis of the tubular shell structure with without significant added manufacturing complication.

Abstract translation: 用于液体火箭推进系统的主动冷却的纤维增强陶瓷基体复合推进室由内部冷却通道设计和生产。 单壳式管状结构由内壁组成，内壁通过径向联接网完全集成到外壁。 在内壁，外壁和相邻的径向腹板之间的分段的环形空隙形成管状热交换器的内部梯形形状的冷却通道通道。 该制造方法能够产生从简单的圆柱形换热器管到具有内部冷却通道的环形阵列的复合会聚发散的Delaval型喷嘴结构的任何通用的管状壳体几何形状。 制造方法允许将管状壳结构从二维圆形几何转变为三维矩形几何形状。 除了将冷却通道相对于管状壳结构的纵向轴线，螺旋或正弦（例如起伏）定向以外，该方法提供产生恒定或连续可变的横截面面积的内部冷却通道的灵活性 没有显着增加制造并发症。