摘要:
Hard-material-coated bodies composed of metal, cemented hard material, cermet or ceramic, coated with a TiSiCN composite layer or with a multilayer layer system which contains at least one TiSiCN composite layer. The TiSiCN composite layer is a nanocomposite layer which has been produced by a thermal CVD process without additional plasma excitation and contains a nanocrystalline phase composed of TiCxN1-x having a crystallite size in the range from 5 nm to 150 nm and a second phase composed of amorphous SiCxNy. The layer is characterized by a high hardness, a high oxidation and heat resistance and a high adhesive strength.
摘要:
The present invention provides a functionally graded glass/ceramic/glass sandwich system for use in damage resistant, ceramic and orthopedic prosthesis. The functionally graded glass/substrate/glass composite structure comprises an outer residual glass layer, a graded glass-ceramic layer, and a dense interior ceramic. The functionally graded glass/substrate/glass composite structure may further comprise a veneer on an exterior surface. The present invention also provides a method for preparing a functionally graded glass/ceramic/glass sandwich system. A powdered glass-ceramic composition is applied to the accessible surfaces of a presintered zirconia substrate to thereby substantially cover the substrate surfaces. The glass of the composition has a CTE similar to that of the substrate material. The glass-ceramic composition is infiltrated into and densifies the substrate by heating the assembly to at least the sintering temperature of the substrate.
摘要:
A method of manufacturing a porous cementitious product, which method comprises: forming a cementitious premix; casting the premix in a desired configuration; generating gas bubbles within the premix; and curing the premix, wherein gas bubbles are generated and/or collapsed at specific locations within the premix in order to produce a porosity profile along a cross-section of the product such that the product comprises a relatively low density core region and higher density outer regions.
摘要:
An environmental barrier is formed on a substrate (10) of ceramic matrix composite material and comprises an outer anticorrosion protection layer (12) containing a compound of the type comprising an aluminosilicate of an alkali, or an alkaline-earth, or a rare-earth element. A bond sub-layer (14) is formed between the substrate (10) and the protection layer (12), the composition of the bond sub-layer varying from substantially pure silicon to substantially pure mullite between an inner face beside the substrate and an outer face, with the silicon content decreasing and the mullite content increasing.
摘要:
On the surface of a carbon substrate 41, a tantalum carbide coating film 42 is formed to coat the carbon substrate 41. The tantalum carbide coating film 42 has a maximum peak value of at least 80 degrees in an orientation angle of a (311) plane corresponding to a diffraction peak of tantalum carbide as determined by X-ray diffraction.
摘要:
A refractory object can include a beta alumina. In an embodiment, the refractory object is capable of being used in a glass fusion process. In another embodiment, the refractory object can have a total Al2O3 content of at least 10% by weight. Additionally, a Mg—Al oxide may not form along a surface of the refractory object when the surface is exposed to a molten glass including an Al—Si—Mg oxide. In a particular embodiment, a refractory object can be in the form of a glass overflow forming block used to form a glass object that includes an Al—Si—Mg oxide. When forming the glass object, the glass material contacts the beta alumina, and during the flowing of the glass material, a Mg—Al oxide does not form along the beta alumina at the surface.
摘要翻译:难熔物体可以包括β氧化铝。 在一个实施方案中,耐火物体能够用于玻璃熔融法。 在另一个实施方案中,耐火物体可以具有至少10重量%的总Al 2 O 3含量。 此外,当表面暴露于包含Al-Si-Mg氧化物的熔融玻璃时,Mg-Al氧化物可能不沿着耐火物体的表面形成。 在一个具体实施方案中,耐火物体可以是用于形成包括Al-Si-Mg氧化物的玻璃物体的玻璃溢流形成块的形式。 当形成玻璃物体时,玻璃材料接触β氧化铝,并且在玻璃材料流动期间,Mg-Al氧化物不会沿着表面的β氧化铝形成。
摘要:
The present invention provides biocidal ceramic compositions incorporating a bioactive ionic species that is chemically bound in a substantially single-phase, crystalline, [NZP]-type structure, methods for producing the crystalline structures, and articles of manufacture incorporating the crystalline structures, and uses of the articles of manufacture. Bioactive ionic species can be, but are not limited to, Ag, Cu, Ni, Zn, Mn, Sn, Co, H, and combinations thereof.
摘要:
A method of installing an acoustical system that provides a desired sound attenuation includes attaching an acoustical panel having a first density, a first porosity and a first void volume to the substrate. A first finishing layer is prepared with first particles, a first binder, a first rheological modifier and water which are combined, applied to the substrate and dried. The first finishing layer has a first density. When the first sound attenuation changes to a second sound attenuation a second finishing layer is prepared to include second particles, a second binder, a second rheological modifier and water. The dried second finishing layer has a second density. If the second density is less than the first density, the second sound attenuation is greater than the first sound attenuation. If the second density is greater than the first density, the second sound attenuation is less than the first sound attenuation.
摘要:
Described herein is a cordierite membrane coated on a monolith substrate formed from cordierite. The membrane coating is formed from cordierite particles which have been processed to have a median particle size diameter of between 1 and 3 microns with a narrow particle size distribution suitable for forming a cordierite membrane on a cordierite monolith substrate. After the cordierite membrane is formed on the cordierite monolith substrate, the cordierite membrane monolith has a pore size of less than 1 micron.
摘要:
A method for fabricating a component having an environmental barrier coating. The method includes providing a component including silicon having a first coefficient of thermal expansion. A bondcoat is bonded to at least a portion of an outer surface of the component. An intermediate layer having a general composition of RE2Si2O7 is bonded to the bondcoat. The intermediate layer has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. A protective layer having a general composition of RE2SiO5 is bonded to the intermediate layer. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.
摘要翻译:一种制造具有环境屏障涂层的部件的方法。 该方法包括提供包括具有第一热膨胀系数的硅的部件。 键合涂层结合到组件的外表面的至少一部分上。 将具有一般组成为RE 2 Si 2 O 7的中间层粘合到粘合涂层。 中间层具有与第一热膨胀系数相匹配的第二热膨胀系数。 具有一般组成为RE 2 SiO 5的保护层与中间层接合。 表面层与保护层结合。 表面层包括RE,RE与氧的比例至少为2:3。