摘要:
A hybrid insulation material comprises of porous ceramic substrate material impregnated with nanoporous material and method of making the same is the topic of this invention. The porous substrate material has bulk density ranging from 6 to 20 lb/ft3 and is composed of about 60 to 80 wt % silica (SiO2) 20 to 40 wt % alumina (Al2O3) fibers, and with about 0.1 to 1.0 wt % boron-containing constituent as the sintering agent. The nanoporous material has density ranging from 1.0 to 10 lb/ft3 and is either fully or partially impregnated into the substrate to block the pores, resulting in substantial reduction in conduction via radiation and convention. The nanoporous material used to impregnate the fiber substrate is preferably formed from a precursor of alkoxysilane, alcohol, water, and an acid or base catalyst for silica aerogels, and from a precursor of aluminum alkoxide, alcohol, water, and an acid or base catalyst for alumina aerogels.
摘要翻译:一种混合绝缘材料包括浸渍有纳米多孔材料的多孔陶瓷衬底材料及其制造方法是本发明的主题。 多孔基材材料的堆积密度为6至20lb / ft 3,并且由约60至80wt%的二氧化硅(SiO 2)20至40wt%的氧化铝(Al 2 O 3)纤维和约0.1至1.0wt %含硼组分作为烧结剂。 纳米多孔材料的密度范围为1.0至10lb / ft 3,并且完全或部分地浸渍到基底中以阻挡孔,导致通过辐射和惯例显着降低传导。 用于浸渍纤维基材的纳米多孔材料优选由烷氧基硅烷,醇,水和用于二氧化硅气凝胶的酸或碱催化剂的前体,以及来自烷氧基铝,醇,水和酸或碱催化剂的前体形成 用于氧化铝气凝胶。
摘要:
High-temperature fabrics with a coatings to provide oxidation protection at high temperatures, and capable of being formed into a variety of softgoods parts, and methods for their manufacture are disclosed.
摘要:
A method for adding insulation or bulk absorbers into high temperature sandwich structures following fabrication is presented. A slurry of ceramic fibers and/or particles, opacified particles, fugitive fibers, organic binders and inorganic binders is prepared as an aqueous solution. The slurry is cast within a prepared sandwich structure, dried, and heated to form a low density ceramic core material to provide insulation or noise absorption. Following incorporation of the ceramic material, aerogels or phase change materials may also be added to provide additional thermal management benefits.
摘要:
A thermal protection system for a vehicle may include a substantially rigid, relatively thin outer aeroshell, a relatively low density insulation layer, and a resiliently compressible conformal layer. The vehicle may include a substructure. The aeroshell may be configured to be fastened to the substructure. The insulation layer may be disposed against the aeroshell. The conformal layer may be disposable against the insulation layer. The conformal layer may be compressively preloaded against the substructure when the aeroshell is fastened to the substructure.
摘要:
Thermal insulation assemblies, methods for fabricating thermal insulation assemblies, and thermally insulated structures are provided. In an exemplary embodiment, a thermally insulated structure is disclosed that includes a thermal insulation assembly comprises a ceramic tile having a surface coated with an alumina-mullite slurry. A ceramic matrix composite is disposed on the coated surface. The ceramic matrix composite comprises a first ply of a ceramic fiber impregnated with a ceramic matrix.
摘要:
Thermal insulation assemblies and methods for fabricating thermal insulation assemblies are provided. In an exemplary embodiment, a thermal insulation assembly comprises a ceramic tile having a surface coated with an alumina-mullite slurry. A ceramic matrix composite is disposed on the coated surface. The ceramic matrix composite comprises a first ply of a ceramic fiber impregnated with a ceramic matrix.
摘要:
A method for reworking a ceramic structure. A number of holes are formed in a portion of the ceramic structure in which a rework of the ceramic structure is desired. The ceramic structure has a plurality of layers in the portion in which the rework is desired. A ceramic bonding material is introduced into the number of holes formed in the portion of the ceramic structure. The ceramic bonding material is cured in the portion of the ceramic structure.
摘要:
A flexible insulation blanket having a ceramic matrix composite (CMC) outer layer, and a method of producing a flexible insulation blanket having a smooth, aerodynamically suitable, outer surface by infiltrating ceramic material within the outer ceramic fabric layer of the flexible insulation blanket and curing the ceramic material to form a CMC layer. The CMC layer is cured while the blanket is under compression such that the resulting CMC layer has a smooth surface.
摘要:
A porous ceramic fiber insulating material and method of making a material having a combination of silica (SiO2) and alumina (Al2O3) fibers, and boron-containing powders is the topic of the new invention. The insulative material is composed of about 60 wt % to about 80 wt % silica fibers, about 20 wt % to about 40 wt % alumina fibers, and about 0.1 wt % to about 1.0 wt % boron-containing powders. A specific boron-containing powder used for this invention is boron carbide powder which provide boron-containing by-products, which aid in fusion and sintering of the silica and alumina fibers. The material is produced by forming an aqueous slurry, blending and chopping the fibers via a shear mixer, orienting the fibers in the in-plane direction, draining water from the fibers, pressing the fibers into a billet, heating the fibers to remove residual water, and firing the billet to fuse the fibers of the material. After sintering, bulk density of the new insulation material ranges from 6 to 20 lb/ft3.
摘要翻译:多孔陶瓷纤维绝缘材料和制备具有二氧化硅(SiO 2)和氧化铝(Al 2 O 3)纤维和含硼粉末的组合的材料的方法是本发明的主题。 绝缘材料由约60重量%至约80重量%的二氧化硅纤维,约20重量%至约40重量%的氧化铝纤维和约0.1重量%至约1.0重量%的含硼粉末组成。 用于本发明的特定的含硼粉末是提供含硼副产物的碳化硼粉末,其有助于二氧化硅和氧化铝纤维的熔融和烧结。 该材料通过形成含水浆料,通过剪切混合器共混和切割纤维来制造,将纤维定向在面内方向,从纤维中排出水,将纤维压制成坯料,加热纤维以除去残留的水 ,并烧制坯料以熔化材料的纤维。 烧结后,新型绝缘材料的体积密度范围为6至20磅/英尺3。
摘要:
A leading edge component for reducing drag and improving heat sink properties of an air foil. The leading edge component includes a composite tile component with a predetermined aerodynamic shape and a metallic lip portion with high thermal conductivity. The metallic lip portion is secured to a forwardmost edge portion of the composite tile component to thereby form a leading edge of the air foil. The leading edge component is better able to withstand the structural stresses and extremely high temperatures that result while travelling at hypersonic speeds, without a significant increase in weight to the air foil with which the leading edge component is used.