Abstract:
Disclosed herein are embodiments of a porous aluminum oxide thin film having a surface RMS roughness value of less than 1 nm. The thin film may also comprise phosphorus. The disclosed thin films may have a refractive index of from 1 to 2, such as from 1 to 1.5. Also disclosed are embodiments of as method for making the disclosed thin films, comprising forming an aqueous solution of the alumina precursor, a surfactant and optionally a phosphorus-containing precursor, and depositing the solution on a substrate.
Abstract:
A method of improving the flow of a proppant pack or gravel pack comprises: introducing into a subterranean formation or a well a plurality of ceramic particles, the ceramic particles comprising about 0.1 wt.% to about 25 wt.% of a rare earth-containing compound, based on the total weight of the ceramic particles; and forming a proppant pack or gravel pack comprising the plurality of the ceramic particles; wherein the proppant pack or gravel pack improves fluid flow as compared with a reference proppant pack or gravel pack formed from otherwise identical ceramic particles except for being free of the rare earth-containing compound.
Abstract:
A silicon carbide -graphite composite is described, including (i) interior bulk graphite material and (ii) exterior silicon carbide matrix material, wherein the interior bulk graphite material and exterior silicon carbide matrix material inter-penetrate one another at an interfacial region therebetween, and wherein graphite is present in inclusions in the exterior silicon carbide matrix material. Such material may be formed by contacting a precursor graphite article with silicon monoxide (SiO) gas under chemical reaction conditions that are effective to convert an exterior portion of the precursor graphite article to a silicon carbide matrix material in which graphite is present in inclusions therein, and wherein the silicon carbide matrix material and interior bulk graphite material interpenetrate one another at an interfacial region therebetween. Such silicon carbide -graphite composite is usefully employed in applications such as implant hard masks in manufacturing solar cells or other optical, optoelectronic, photonic, semiconductor and microelectronic products, as well as in ion implantation system materials, components, and assemblies, such as beam line assemblies, beam steering lenses, ionization chamber liners, beam stops, and ion source chambers.
Abstract:
Die Erfindung betrifft Werkstoffe auf Basis von α/β-Sialon. Insbesondere betrifft die Erfindung Werkstoffe auf Basis von α/β-Sialon mit einer verbesserten Sinteraktivität und einer hohen Kantenbeständigkeit der aus den Werkstoffen gefertigten Sinterformkörper.
Abstract:
Composite materials with dielectric properties for use in microwave applications, and methods of fabrication, are described. The composite materials include a filler, for example a ceramic, with high relative permittivity and a polymer constituent. The resulting composite material has a relative permittivity suitable for use in microwave applications. Dielectric resonator antennas using the composite material are also described.
Abstract:
The disclosure relates generally to a method for reducing the thermal expansion/shrinkage behavior between fiber reinforced plies and monolithic matrix plies, and reducing the macroscopic defects that occur during process of making a ceramic matrix composite article.
Abstract:
The present invention relates to a body made of a ceramic material based on zirconia, said body having a surface region extending from the surface of the body to a predetermined depth and a core region integrally formed with said surface region. The ceramic material in the surface region comprises a crystalline phase A formed by zirconia in tetragonal phase. The invention is characterized in that the ceramic material in the surface region further comprises a crystalline phase B, the crystal structure of which comprising apart from zirconium and oxygen at least one further component X in a periodic arrangement, said crystalline phase B having a lower theoretical density than crystalline phase A.
Abstract:
A method for incorporating strontium ions in zirconia, the method comprising: a) contacting a liquid solution comprising strontium ions with a zirconia body implant; b) drying said zirconia body implant; c) heating said dried zirconia body implant at temperature higher than 1000 °C.
Abstract:
Systems and methods for fabricating multi-functional articles comprised of additively formed gradient materials are provided. The fabrication of multi-functional articles using the additive deposition of gradient alloys represents a paradigm shift from the traditional way that metal alloys and metal/metal alloy parts are fabricated. Since a gradient alloy that transitions from one metal to a different metal cannot be fabricated through any conventional metallurgy techniques, the technique presents many applications. Moreover, the embodiments described identify a broad range of properties and applications.
Abstract:
L'invention se rapporte à un procédé pour réduire la rugosité de surface de fibres de carbure de silicium, lesdites fibres étant des fibres de 3 ème génération et étant destinées à forme la préforme fibreuse d'un composite à matrice céramique. Le procédé comprend un traitement d'attaque chimique de la surface des fibres par mise en contact desdites fibres avec une solution comprenant un agent oxydant.