Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von schweiß- und lötbaren Metallisierungen auf keramischen Substraten zur elektrischen Kontaktierung sowie keramische Substrate mit solchen Metallisierungen.
Abstract:
The present invention is a technological sequence which is composed of uniaxial freezing with control solution composition, followed by freeze-drying, followed by sintering, and followed by infiltration. The invention enables the manufacturing of functionally graded composites. These composites can include spatially distributed phases of ceramics, metals, polymers, glasses, and their combinations as long as the composite matrix material is originally in the form of powders. During uniaxial freezing, the diameter of crystals growing from the suspension (and, thus, the diameter of the voids formed after freeze-drying) is dependent on the controllable rate of cooling, pressure and the changeable chemical composition of the suspension liquid phase. Thereby a structure with conic voids can be created. After following sintering and infiltration, the produced composite (e.g., ceramic-metal composite) will have a specially distributed concentration of the second phase in the composite matrix, that is, it will have a functionally-graded structure.
Abstract:
Un procédé pour le lissage de surface d'une pièce en matériau composite à matrice céramique présentant une surface ondulée et rugueuse. Le procédé comprend Ia formation sur Ia surface de Ia pièce d'un revêtement céramique réalisé par application (20) sur la surface de la pièce d'une composition liquide contenant un polymère précurseur de céramique et une charge solide réfractaire, réticulation du polymère (40), et transformation (50) du polymère réticulé en céramique par traitement thermique. Le procédé comprend en outre Pimprégnatïon du revêtement céramique par une composition métallique liquide (60).
Abstract:
Die Erfindung betrifft einen Körper aus keramischen Werkstoffen mit einer Grundmetallisierung aus mindestens einem el ektrisch leitfähigen Material, wie beispielsweise Wolfram-Glas- oder Molybdän-Glasverbindungen und einem haftfähigen, elektrisch leitfähigen und korrosionsbeständigen Überzug. Um Energieverluste zu verbessern, d. h. den Q-Faktor zu erhöhen, wird vorgeschlagen, dass der Überzug mindestens eine Funktionsschicht aus einem Metall und / oder mehreren Metallen mit einem zum elektrisch leitfähigen Material und den übrigen Bestandteilen des Überzuges niedrigeren spezifischen elektrischen Widerstand enthält / trägt.
Abstract:
Disclosed is a series of materials which can be applied as surface coating film to double-fired, porous single-fired, single-fired and porcelain stoneware ceramic objects. These materials can be in powder form, in a carrier suspension, in granular form, atomized, sintered, pelletized and the like, in the most suitable grain sizes.
Abstract:
Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85 %. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material. Typically, less than about 70 % of the body of the diamond matrix table is free of the catalyzing material.
Abstract:
The invention relates to the field of technical ceramics and specifically relates to a method of synthesis for aluminum oxides of different crystalline structure and to the products obtained by said method. The aim of the invention is to provide a method of producing redispersible nanoparticulate corundum and nanoporous Al2O3 sintered products, said method using precursors and being viable on a commercial scale. To this aim, inter alia, a method of producing redispersible nanoparticulate corundum of an average particle size of D50
Abstract:
The invention relates to the field of technical ceramics and specifically relates to a method of synthesis for aluminum oxides of different crystalline structure and to the products obtained by said method. The aim of the invention is to provide a method of producing redispersible nanoparticulate corundum and nanoporous Al2O3 sintered products, said method using precursors and being viable on a commercial scale. To this aim, inter alia, a method of producing redispersible nanoparticulate corundum of an average particle size of D50
Abstract:
A carbon-based metal composite material comprising a carbonaceous matrix and a metal component dispersed therein, wherein 90 volume % or more of pores present in the carbonaceous matrix are replaced by the metal component and the content of the metal component is 35 % or less based on the total volume of the carbon-based metal composite material; a method for preparing a carbon-based metal composite material by the impregnation of a formed article of carbon with a molten metal under pressure which comprises preheating the formed article of carbon and then forcing the molten metal into pores of the formed article of carbon by the application of a pressure of 200 kg/cm or more, to thereby impregnate the formed article with the molten metal; and a formed article in the shape of a substrate for electronic equipment which comprises the carbon-based metal composite material.
Abstract translation:包含碳质基质和分散在其中的金属成分的碳基金属复合材料,其中存在于碳质基质中的孔的90体积%以上被金属成分代替,金属成分的含量为35%以下 关于碳基金属复合材料的总体积; 通过在压力下用熔融金属浸渍成形品碳制备碳基金属复合材料的方法,该方法包括预热形成的碳制品,然后将熔融金属强制成形成碳制品的孔 施加200kg / cm 2以上的压力,从而使熔融金属浸渍成型制品; 以及包含碳基金属复合材料的电子设备用基板形状的成形体。
Abstract:
The invention relates to a substrate consisting of sintered SiC. The inventive substrate is provided with a silicon layer and is characterised in that an inert layer is provided on said silicon layer. The substrate is especially suitable as a substrate for storage disks.