摘要:
SiC—C/C composite materials having a suitable kinetic coefficient of friction, good corrosion resistance in strongly oxidizing and corrosive environments, good creep resistance and spalling resistance, and high hardness. The materials are hardly oxidized or abraded even when exposed to high temperatures, while maintaining the excellent impact resistance and light weight of C/C composites. Molten metal pumps using the materials are provided from which components do not dissolve into the molten metal even when used in molten metal and have sufficient thermal impact resistance and oxidation resistance.
摘要:
A member for brakes that has a light weight, shock resistance characteristics, excellent corrosion resistance characteristics etc., high abrasive wear resistance characteristics and is made from fiber-composite material is comprised of an assemblage of yarns in which yarns, containing at least a bundle of carbon fibers and a carbon component other then carbon fiber are three-dimensionally combined and integrally formed so as to avoid separation there between; and matrices made of Si—SiC-based material filling the spaces between said yarns adjacent to each other within said assemblage of yarns.
摘要:
A fiber-composite material (7) is comprised of a yarn aggregate (6) in which yam (2A, 2B) including at least a bundle (3) of carbon fiber and a carbon component other than carbon fiber is three-dimensionally combined and integrally formed without separation from each other; and a matrix made of Si—SiC-based materials (4A, 4B, 5A, 5B) filled between the yarn (2A, 2B) adjacent to each other within the yarn aggregate (6). A method of preparing fiber-composite material is comprised of the steps of: producing bundles (3) of carbon fiber by impregnating a component of powdery carbon into the bundles (3) of carbon fiber, which eventually forms a matrix shape; forming a plastic coat around the bundles (3) of carbon fiber to obtain an intermediate material; molding the intermediate material to obtain a molded product by making the intermediate material into a yarn-shape and laminating a predetermined amount of the material, or burning the molded product to obtain a burned product; holding the molded product or the burned product and Si, at 1100 to 1400° C. in an atmosphere of inert gas; and heating the molded product or the burned product and Si to a temperature from 1450 to 2500° C., to thereby impregnate Si—SiC-based material into the inside of pores of the molded product or the burned product. A light and strong composite material is provided, which has excellent shock resistance, corrosion resistance in a strong oxidation and corrosion environments, creep resistance, spalling resistance, wear resistance, a low friction coefficient and a self-restorative ability by which a defect is healed.
摘要:
A furnace for sintering non-oxide ceramics, particularly Si.sub.3 N.sub.4, which includes a space for accommodating a ceramic shaped body, carbon heaters arranged around the ceramic shaped body in said space and heat insulating layers of carbon fiber mat that cover the inner walls of the furnace. The furnace also includes sheets composed of laminated graphite leaves having an ash content of not more than 0.3% by weight extendedly provided between the heat insulating layers and the ceramic shaped body. As the carbon heaters, those composed of a high purity graphite having a carbon content of at least 99.9980%, a silicon content of not more than 5 ppm and an iron content of not more than 9 ppm, by weight, are preferably used. A process is also disclosed which utilizes the above apparatuses to protect the shaped body from an influence of carbon fiber dusts liberating from the insulating layers during sintering.
摘要:
A structure defining a divided combustion chamber of an internal combustion engine, including an upper ceramic member and a lower ceramic member having a passage which abut on each other at an interface to form therein the divided combustion chamber such that the chamber communicates with a main combustion chamber through a passage formed in the lower ceramic member. The upper and lower ceramics members have cutouts formed respectively in their outer surfaces so as to cooperate to constitute at least one external recess which extends across the interface. An expansion member is fitted in each external recess, and has a larger coefficient of thermal expansion than the upper and lower ceramic members, whereby the expansion member keeps the upper and lower ceramic members spaced apart from each other by a predetermined amount at their interface while the engine is operated.
摘要:
A precombustion chamber construction of an internal combustion engine includes an upper ceramic body, a lower ceramic body abutting against the upper ceramic body to form a precombustion chamber communicating through an injection hole with a main combustion chamber of the internal combustion engine, and a metal ring member fitted on outer circumferences of the upper and lower ceramic bodies. According to the invention, the precombustion chamber construction comprises a first key member provided in the upper ceramic body and the metal ring member in the proximity of its upper end, and a second key member provided in the lower ceramic body and the metal ring member in the proximity of its lower end. In this manner, the upper and lower ceramic bodies are prevented from being rotatively moved even if they are subjected to rotating forces caused by vibrations of the engine or explosions of a fuel. The precombustion chamber construction is easy to handle and superior in gas sealing because an air layer is easily formed between the metal ring member and a cavity of a cylinder head for accommodating the precombustion chamber construction.
摘要:
The present invention provides a column for a liquid chromatograph having a honeycomb substrate including holes through which a sample flows and a separation phase filled in the holes. The separation phase is a porous bone structure composed of an inorganic material having open pores formed therein, and the porous bone structure is generated by a sol-gel transition process accompanied by a phase transition.
摘要:
The present invention provides a firing furnace (100) comprising a combusting means (2) for combusting a fuel (11), a firing furnace main body (1) for firing a member to be fired and exhausting a combustion gas, and a methane reforming device (3) for reacting a reforming material (23) composed of a methane sub fuel for reformation (21) and steam (22) with a methane reforming catalyst (6) filled therein while heating the same by the combustion gas for producing a reformed gas (24) containing hydrogen and carbon dioxide, capable of cutting back the fuel cost.
摘要:
An object of the present invention is to provide an inorganic porous body having an inorganic porous bone structure as the main body in which various kinds of particles can be uniformly loaded onto the wall surface facing the open pores. The inorganic porous composite body has an inorganic porous bone structure with open pores formed therein and particles for dispersion exposing to the wall surfaces of the bone structure facing the open pores. The bone structure is generated by sol-gel transition accompanied by phase transition.
摘要:
The present invention provides a firing furnace (100) comprising a combusting means (2) for combusting a fuel (11), a firing furnace main body (1) for firing a member to be fired and exhausting a combustion gas, and a methane reforming device (3) for reacting a reforming material (23) composed of a methane sub fuel for reformation (21) and steam (22) with a methane reforming catalyst (6) filled therein while heating the same by the combustion gas for producing a reformed gas (24) containing hydrogen and carbon dioxide, capable of cutting back the fuel cost.