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    • 9. 发明授权
    • Tandem ceramic composite
    • 串联陶瓷复合材料
    • US5198282A
    • 1993-03-30
    • US106746
    • 1987-10-08
    • Anna L. BakerKristina S. Preedy
    • Anna L. BakerKristina S. Preedy
    • B32B5/26C03C14/00F25D3/10F28D15/04F28F21/04H01L39/14
    • B32B5/26C03C14/002C03C14/004F25D3/10F28D15/046F28F21/04H01L39/143C03C2214/02C03C2214/04C03C2214/06C03C2214/10C03C2214/20C03C2214/32Y10T428/24132Y10T428/24149Y10T428/24157Y10T428/24165Y10T428/2931
    • The composite comprises ceramic fiberformed insulation bonded to a fiber reinforced ceramic matrix laminate. Ceramic insulation has a mat of intersecting, discrete ceramic fibers bonded with a sol-gel glass binder. The insulation is prepared by forming a slurry of ceramic fibers, molding the slurry to form a soft felt mat, drying the mat, and incrementally introducing the binder into the mat with a multiple-impregnation technique, which controls shrinkage of the ceramic fiber mat. This process provides a layering technique that permits formation of a continuous fibrous structure having layers that impart distinct characteristics at desired regions within the structure. By using different ceramic fibers and fibers of differing physical dimension, or by including additives with the slurries, tailoring of the physical characteristics of the insulation is achieved.The reinforced ceramic matrix laminate is laid up on the ceramic insulation in a wet lay-up technique and includes a continuous ceramic fiber reinforcement and a cementaceous matrix that includes a ceramic filler, like mullite; ceramic reinforcing whiskers, such as silicon nitride or silicon carbide whiskers; and a binder, such as colloidal silica. An activator may also be used in the matrix. Matrix is worked into the ceramic insulation and fiber reinforcement during the lay-up.The tandem composite exhibits resistance to high temperatures for extended exposure without degradation and possesses improved flexural strength over conventional ceramics made without exotic pressure fabricating processes. The tandem composite can readily be formed into complex curvatures and can include integral mounting flanges (strengthened with the matrix laminate) for fastening the composite to structural materials.
    • 复合材料包括陶瓷纤维成型绝缘体,结合到纤维增强陶瓷基体层压板上。 陶瓷绝缘体具有与溶胶 - 凝胶玻璃粘合剂结合的相交的离散陶瓷纤维垫。 通过形成陶瓷纤维的浆料,模塑浆料以形成软毡垫,干燥垫子,并以多次浸渍技术逐渐将粘合剂引入垫中来制备绝缘体,该技术控制陶瓷纤维毡的收缩。 该方法提供了一种分层技术,其允许形成具有在结构内的期望区域赋予不同特征的层的连续纤维结构。 通过使用具有不同物理尺寸的不同陶瓷纤维和纤维,或通过在浆料中包含添加剂,实现了绝缘物理特性的定制。 增强陶瓷基体层压板以湿法铺设技术铺在陶瓷绝缘层上,其中包括连续的陶瓷纤维增强材料和包括陶瓷填料如莫来石的胶结基质; 陶瓷增强晶须,例如氮化硅或碳化硅晶须; 和粘合剂,例如胶体二氧化硅。 活化剂也可用于基质中。 矩阵在堆叠过程中进入陶瓷绝缘层和纤维增强层。 串联复合材料展现出对高温的抗性,用于延长曝光而不降解,并且具有比不具有外来压力制造工艺的常规陶瓷更好的弯曲强度。 串联复合材料可以容易地形成复杂的曲率,并且可以包括用于将复合材料紧固到结构材料的整体安装凸缘(与基体层压件一起加固)。