摘要:
A composition for manufacturing a composite of a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix includes a preceramic polymer for forming a non-oxide ceramic matrix and a refractory material dispersed within the preceramic polymer.
摘要:
A method of manufacturing a composite article includes pyrolyzing a preceramic polymer to form a non-oxide ceramic matrix and a byproduct, and reacting the refractory material with the byproduct to form a refractory phase within the non-oxide ceramic matrix.
摘要:
The disclosure provides a device and method used to produce a tubular structure made of a refractory metal compound. In particular, the disclosure provides a device and method used to produce a tubular structure made of a refractory metal compound by reacting a green tubular structure made of a refractory metal with at least one reactive gas.
摘要:
Embodiments of the present invention disclosed herein include a sintering aid composition that has a material useful for sintering, an amine, and optionally a carboxylic acid.
摘要:
The application discloses and claims an oxidation resistant, continuous-fiber-reinforced ceramic composition, durable at temperatures above 1000° C., and capable of taking on any arbitrary near net shape formed without machining and tooling. The composition of the invention comprises a fine grained ceramic matrix which in turn comprises a mixture of a ZrB2 phase and a SiC phase with the matrix being reinforced with SiC or C or an oxide fiber, resulting in a fine grained ZrB2—SiC matrix with domain sizes ≦0.5 μm. The ZrB2 phase of the invention is capable of forming small microcrystalline domains ≦0.5 μm upon heat treatment. The composition the invention also comprises a fiber reinforced composite with a high degree of filling and densification of its preform resulting in a composition containing a low level of porosity and high fiber volume fraction.
摘要:
The invention relates to a method for continuously producing pre-ceramic polymers. The inventive method consists in synthesizing polymers, in separating polymers from a reaction mixture and in thermally conditioning for defining a cross linkage degree and rheological properties, wherein all said steps are integrated into a single method. The thus obtainable polymers are used in the form of an initial material for producing non-oxidized ceramics in ternary X/Y/N or X/Y/N/C quaternary systems. Said materials are characterized by the high mechanical, thermal and chemical resistance thereof, wherein any X and Y combination can represent in particular Si, B, P, Al, Ti, V, Zr, Ta elements.
摘要翻译:本发明涉及连续生产预陶瓷聚合物的方法。 本发明的方法在于将聚合物从反应混合物中分离出来并在热调节中用于限定交联度和流变性质,其中所有所述步骤被整合成单一方法。 由此获得的聚合物以用于在三元X / Y / N或X / Y / N / C四元体系中生产未氧化陶瓷的初始材料的形式使用。 所述材料的特征在于其机械,耐热和耐化学性能高,其中任何X和Y组合可特别表示Si,B,P,Al,Ti,V,Zr,Ta元素。
摘要:
The invention relates to a new class of luminescent substances (phosphorous) based on an universally dopable matrix made of an amorphous, at the most partially crystalline network of the elements P, Si, B, Al and N, preferably the composition Si3B3N7. Optical excitation and emission can be varied in this system over the entire practically relevant field by incorporation of any cationic activators, alone or in combination, but also by incorporation of oxygen as anionic component. This opens up the entire spectrum of use of luminescent substances, such as illumination systems or electronic screens.
摘要翻译:本发明涉及一种基于由元素P,Si,B,Al和N的最部分结晶网络(优选组成Si 3 B 3 N 7)由非晶体制成的普遍可掺杂的基质的新一类发光物质(磷)。 在整个实际相关领域中,光学激发和发射可以通过并入任何阳离子活化剂,单独或组合,而且通过引入氧作为阴离子组分,可以在该系统中变化。 这开辟了发光物质的全部使用范围,如照明系统或电子屏幕。
摘要:
There are provided in accordance with embodiments of the invention metal-containing inorganic block copolymers, structures formed by self-assembly of such copolymers, and metal-containing ceramics which may be formed from such copolymers and/or structure. Methods for making such copolymers, structures and ceramics are also provided. Other embodiments are also disclosed.
摘要:
This invention pertains to a method of forming a fiber-reinforced ceramic matrix composite comprising: (a) impregnating a ceramic fiber coated with at least one layer binary coating comprised of boron nitride and silicon nitride wherein the silicon nitride is applied over the boron nitride with a preceramic composition comprising a curable preceramic polymer; (b) forming the impregnated fibers into a desired shape; (c) curing the formed impregnated fibers; (d) heating the cured impregnated fibers of (c) to a temperature of at least 1000null C. in an inert atmosphere for a time effective to convert the preceramic polymer to a ceramic.
摘要:
This invention pertains to ceramic matrix composites that comprise the coated ceramic fibers wherein the coating comprises at least one binary coating of boron nitride (BN) and silicon nitride (Si3N4) within ceramic matrices derived from curable preceramic polymers. The composites can be formed into complex shapes which have good oxidation resistance at high temperature, good resistance to moisture high flexural strength and are resistant to moisture.
摘要翻译:本发明涉及包含涂覆的陶瓷纤维的陶瓷基质复合材料,其中涂层包含至少一种二氧化氮(BN)和氮化硅(Si 3 N 4)的二元涂层,该陶瓷基体来源于可固化预陶瓷聚合物。 复合材料可以形成复杂的形状,在高温下具有良好的抗氧化性,良好的抗潮湿性,抗弯曲强度和抗潮湿性。