摘要:
A thermal management system utilizing a composite thermal radiation barrier comprising alternating layers of a carbon cloth insulating layer and a silica-based organic cloth to reduce the temperatures experienced by the insulating layer.
摘要:
A thermal protection system (TPM) for protecting a surface subject to high thermal load comprising a fiber substrate where the substrate is composed of woven or non-woven layers of fibers laminated together, or the substrate is formed by a process of three-dimensional weaving, wherein the fiber substrate has a variable density of fibers, with said density of fibers increasing across the thickness of the TPM, and further wherein the substrate is needled and coupled to an insulation backing.
摘要:
A fire-resistant heat insulating material excellent in resistance to heat, resistance to slag, resistance to molten iron, resistance to wear, and resistance to mechanical impulse is provided. A highly endurable heat insulating material characterized by being provided on the surface of a layer of inorganic heat insulating fibers through the medium of a coating film of surface hardening material with a flame sprayed film of a fire-resistant ceramic substance.
摘要:
A flexible insulation blanket having a smoothly surfaced, secondarily bonded, ceramic matrix composite (CMC) outer layer, and a method of producing a flexible insulation blanket having a secondarily bonded CMC layer by forming a CMC prepreg layer comprising a woven ceramic fabric layer impregnated with a pre-ceramic slurry and layering the prepreg layer with a flexible insulation blanket. The blanket and prepreg layer are then compressed such that the prepreg layer abuts a rigid smoothly surfaced plate and the ceramic material is cured by heating while under compression. Pressure is then released and the insulation is fired to center the ceramic material of the CMC layer.
摘要:
Monazite or xenotime-based blanket coatings that stiffen ceramic fabrics without causing embrittlement at temperatures of at least as high as 2400null F. are provided. Methods for making the coatings are also provided. The methods comprise the synthesis of high purity, monazite and xenotime powders with the stoichiometric ratio of metal to phosphorous of about 1:1.
摘要:
A coated fiber mat of improved tear strength upon dividing pieces of the coated mat and the coating is provided. The coated mat is a cured, non-woven mat including a mixture of fibers having different fiber lengths. The fibers contain a polysiloxane compound and are fixedly distributed in a binder.
摘要:
A rocket motor assembly is insulated or thermally protected with a rocket motor ablative material formed from a prepreg. The prepreg contains at least an impregnating resin matrix and, as a precursor prior to carbonization, either carded and yarn-spun solvent-spun staple cellulosic fibers, solvent-spun cellulosic filaments, or a combination thereof. When patterned and carbonized, the rocket motor ablative material can be lined or otherwise placed into a rocket motor assembly, such as between the solid propellant and case, in the bulk area of the exit nozzle liner, or at susceptible portions of a re-entry vehicle, such as the nose cone.
摘要:
A composite fiber prepared by wrapping a core of polyethylene filaments having a dielectric of less than 3.0 with a direct sized quartz fiber to provide a composite fiber and fabric woven therefrom with improved high temperature strength and low dielectric constant.
摘要:
An aqueous binder composition containing a urea-formaldehyde resin modified with a water-soluble styrene-maleic anhydride copolymer is used in the preparation of fiber mats.
摘要:
Reinforcement of structures in high-moisture environments is achieved by applying reinforcement layers which include a fabric portion and an uncured resin portion where the uncured resin contains a moisture curable silicon-modified polyether resin. The uncured reinforcement layer is cured in place about the structure to form a composite reinforcement shell. The uncured reinforcement layer is formed from either dry-woven fabric or woven fabric which is pre-impregnated with a cured resin and then coated with the moisture-curable silicon-modified polyether resin. The invention finds particular use in reinforcing bridge supports and pilings which are at least partially submerged in water. Containment layers are used to prevent de-lamination during curing of the reinforcement structure. Use of a containment layer not only prevents de-lamination caused by waves or other turbulent water, but also enhances the underwater curing process.