摘要:
Ceramic composite materials that are reinforced with carbide fibers can exhibit ultra-high temperature resistance. For example, such materials may exhibit very low creep at temperatures of up to 2700°F (1480°C). The present composites are specifically engineered to exhibit matched thermodynamically stable crystalline phases between the materials included within the composite. In other words, the reinforcing fibers, a debonding interface layer disposed over the reinforcing fibers, and the matrix material of the composite may all be of the same crystalline structural phase (all hexagonal), for increased compatibility and improved properties. Such composite materials may be used in numerous applications.
摘要:
Vessels selected from crucibles, pans, open cups and saggars essentially comprising of two components, from which (A) one component being a monolithic ceramic material, (B) the second component being a ceramic matrix composite, and wherein component (A) is the inner part, or inlay.
摘要:
An inorganic fiber containing silica and magnesia as the major fiber components which further includes intended synergistic amounts of calcia and, an additional alkali metal oxide other than magnesia, such as lithium oxide, to improve the thermal performance and manufacturability of the fiber. The inorganic fiber is easier to manufacture, has a better fiber quality, exhibits good thermal performance at a use temperature of 1260°C and greater, retains mechanical integrity after exposure to the use temperature, and exhibits low biopersistence in physiological fluids. Also provided are methods of preparing the inorganic fiber and of thermally insulating articles using thermal insulation prepared from the inorganic fibers.
摘要:
Apparatus for forming melt-formed fibres comprises:- • a source of molten material; • a spinning head comprising one or more rotors; • a plurality of nozzles or slots disposed around at least part of the one or more rotors, configured to supply a stream of gas; • a conveyor; and • a barrier (4) between the spinning head and the conveyor (6), an upper edge of the barrier lying below a horizontal line (22) lying in a first vertical plane (17) including the axis of rotation (16) of at least one rotor of the one or more rotors and intersecting the intersection of the axis of rotation with a second vertical plane (18) orthogonal to the first vertical plane and including a vertical line (20) through said region, the included angle between the horizontal line (22) and a line (21) in the first vertical plane joining the upper edge of the barrier and the intersection of the horizontal line and axis of rotation being in the range 40°-85°. Method of making melt-formed fibres using the apparatus. Melt formed biosoluble fibres being alkaline earth silicate fibres having a low shot content.
摘要:
An inorganic fiber containing silica and magnesia as the major fiber components and which further includes an intended iron oxide additive to improve the dimensional stability of the fiber. The inorganic fiber exhibits good thermal insulation performance at 1400°C and greater, retains mechanical integrity after exposure to the use temperature, and which remains non-durable in physiological fluids. Also provided are thermal insulation product forms comprising a plurality of the inorganic fibers, methods of preparing the inorganic fiber and of thermally insulating articles using thermal insulation prepared from a plurality of the inorganic fibers.
摘要:
Provided herein is a method of manufacturing a nanoscale coated network, which includes providing nanofibers, capable of forming a network in the presence of a liquid vehicle and providing a nanoscale solid substance in the presence of the liquid vehicle. The method may also include forming a network of the nanofibers and the nanoscale solid substance and redistributing at least a portion of the nanoscale solid substance within the network to produce a network of nanofibers coated with the nanoscale solid substance. Also provided herein is a nanoscale coated network with an active material coating that is redistributed to cover and electrochemically isolate the network from materials outside the network.
摘要:
Matériau composite constitué par une matrice en au moins un aluminosilicate choisi notamment parmi l'aluminosilicate de baryum BAS, l'aluminosilicate de baryum et de strontium BSAS, l'aluminosilicate de strontium SAS, et leurs mélanges, renforcée par des renforts en au moins un oxyde de métal ou de métalloïde dont le coefficient de dilatation est voisin de celui du au moins un aluminosilicate. Procédé de préparation dudit matériau composite. Matériau composite selon l'invention trouvant notamment son application dans le domaine aéronautique ou aérospatial, par exemple pour la fabrication de radomes.
摘要:
Provided herein are lithium-containing nanofibers (e.g., nanocomposite nanofibers) and processes for preparing the same. In specific examples, provided herein are nanocomposite nanofibers comprising continuous lithium matrices and nanocomposite nanofibers comprising non-aggregated lithium domains.
摘要:
Exemplary embodiments provide systems, devices and methods for the fabrication of three-dimensional polymeric fibers having micron, submicron, and nanometer dimensions, as well as methods of use of the polymeric fibers.