摘要:
A tubular body according to the present invention has a SiC tube reinforced by SiC fiber as a base material and a metal layer formed inside the base material. Also, in a structure of the tubular body, a rare earth silicate layer is formed on a side of an outer surface of the base material. According to this, a tubular body is provided which relates to a fuel placed in a core part in a reactor for using water as a coolant and prevents generation of hydrogen due to a reaction with water in case of an accident. The tubular body is suitable for a fuel cladding tube having a structure with high reliability relative to radioactive nuclide containment at the time of a normal operation and transfer.
摘要:
A method for forming a pattern on a surface of an insulating substrate and a ceramic article comprises: forming a film that comprises any one of ZnO, SnO 2 , TiO 2 and a combination thereof on at least one surface of the insulating substrate; irradiating at least a part of the film by an energy beam to form the pattern in the film.
摘要:
L'invention se rapporte à un procédé de fabrication (21) d'un élément (10, 10', 10") comportant les étapes suivantes : a) former (20) un corps (11, 11', 11 ") en céramique à base d'oxyde ; b) exposer (22) à une réaction de réduction, au moins une partie (15, 15', 15") de surface externe (F) du corps (11, 11', 11") afin de l'appauvrir en atomes d'oxygène selon une profondeur prédéterminée dans le but de rendre ladite au moins une partie (15, 15', 15") électriquement conductrice ; c) déposer (24) un matériau métallique (16, 16', 16") à partir de ladite au moins une partie (15, 15', 15") rendue électriquement conductrice ; d) usiner (26) le corps (11, 11', 11") et/ou le matériau métallique (16, 16', 16") afin de finir esthétiquement l'élément (10, 10', 10"). L'invention concerne le domaine des pièces d'horlogerie.
摘要:
The invention relates to a process for producing a resistance heating element and also a resistance heating element (10), where the resistance heating element has a tubular shape, where the resistance heating element is made in one piece, where the resistance heating element is made of silicon carbide, which comprises the process steps: - formation of a one-piece shaped body composed of fibres of a fibre material, where the fibres have an unstructured fibre orientation, - impregnation of the shaped body with a matrix material, - curing of the matrix material, - pyrolysis of the materials of the shaped body, - silicization of the shaped body, with the shaped body being converted into the resistance heating element.
摘要:
An LED light source (10) comprises a ceramic substrate (20) with first and second opposed surfaces (30, 40). Pockets (50) are formed in the first surface (30) and each of the pockets includes a bottom (60) and a sidewall or sidewalls (70). A final electrical contact (105) comprised of a first electrically conductive material (57) with a coating of a second electrically conductive material (100) thereover is positioned in each of the pockets (50). An LED (110) is positioned in each of the pockets (50) and affixed to the electrical contact (105) and electrical connections (120), preferably in form of wire bonds, join the LEDs, the electrical connections (120) extending from a first LED (110) to an adjacent electrical contact (105). The ceramic substrate (20) is formed by injection molding a ceramic material and binder to form a green substrate (12) and subsequently sintering the green substrate to form the substrate (20). An LED light (150) can be formed from the LED light source (10) by adding a dome (150) formed of a ceramic material containing therein a homogeneous dispersion of a phosphor material capable of emitting light when excited by the light emitted from the operating LEDs (110).
摘要:
The invention relates to a method for smoothing a corrugated, rough surface of a part made from a ceramic matrix composite material. According to the invention, a ceramic coating is formed on the surface of the part by means of the following steps, namely: application (20) of a liquid composition on the surface of the part, said composition containing a ceramic precursor polymer and a solid refractory filler; crosslinking (40) of the polymer; and conversion (50) of the crosslinked polymer into ceramic by means of heat treatment. The method also includes the impregnation of the ceramic coating with a liquid metal composition (60).