Abstract:
Improved silicon carbide particles, improved silicon carbide abrasive particles, and abrasive slurry compositions for use chemical mechanical planarization (CMP) processes, the particles can comprise nano-sized carbide particles, particularly silicon carbide particles having a surface chemistry similar to silica.
Abstract:
The present invention contemplates a variety of methods and techniques for fabricating an improved carbon nanotube (CNT) device such as an AFM probe. A CNT is first formed on a desired location such as a substrate. The CNT and substrate are then covered with a protective layer through a CVD or other suitable process. Then a length of the CNT is exposed through etching or other suitable process, the exposed length being formed to a length suitable for a desired application for the CNT device.
Abstract:
One or more two-dimensional fiber fabrics of carbon or carbon precursor fibers are impregnated (58, 59) by a solution or a suspension capable of allowing a dispersion of discrete ceramic particles to remain in the fiber fabric, and a fiber preform (51) is made by superposing plies formed of two-dimensional fabric made of carbon or carbon precursor fibers, the plies being bonded to one another, and at least some of the plies being at least partially formed of a previously- impregnated two- dimensional fabric. The field of application is particularly that of friction parts made of C/C composite material with incorporated ceramic particles.
Abstract:
Binder compositions are disclosed that include silica aquasols having silica that is metal-modified to include a monolayer or less of a metal such as aluminum, tin, zinc or lead, and deionized to a pH of 2,5-7.0 and a water soluble polymer such as poly(vinyl alcohol). An adhesive that includes a silica aquasol, an oxygen-moiety containing polymer, and clay, the surface of the silica being modified to include a metal, and the silica aquasol being deionized to a pH of 2.5 to 7.
Abstract:
Binder compositions are disclosed that include silica aquasols having silica that is metal-modified to include a monolayer or less of a metal such as aluminum, tin, zinc or lead, and deionized to a pH of 2,5-7.0 and a water soluble polymer such as poly(vinyl alcohol). An adhesive that includes a silica aquasol, an oxygen-moiety containing polymer, and clay, the surface of the silica being modified to include a metal, and the silica aquasol being deionized to a pH of 2.5 to 7.
Abstract:
Nuclear fuel structures and methods for fabricating are disclosed herein. The nuclear fuel structure includes a plurality of fibers arranged in the structure and a multilayer fuel region within at least one fiber of the plurality of fibers. The multilayer fuel region includes an inner layer region made of a nuclear fuel material, and an outer layer region encasing the nuclear fuel material. A plurality of discrete multilayer fuel regions may be formed over a core region along the at least one fiber, the plurality of discrete multilayer fuel regions having a respective inner layer region of nuclear fuel material and a respective outer layer region encasing the nuclear fuel material. The plurality of fibers may be wrapped around an inner rod or tube structure or inside an outer tube structure of the nuclear fuel structure, providing both structural support and the nuclear fuel material of the nuclear fuel structure.
Abstract:
A cBN tool that exhibits: excellent chipping resistance and wear resistance; and excellent cutting performance, for a long term use even in intermittent cutting work on high hardened steel is provided. The cutting tool includes a cutting tool body that is a cubic boron nitride-based material containing cubic boron nitride particles as a hard phase component. In the cutting tool, the cubic boron nitride particles includes an Al 2 O 3 layer with an average layer thickness of 1.0-10 nm on a surface of the cubic boron nitride particles, a rift with an average rift formation ratio of 0.02-0.20 being formed in the Al 2 O 3 layer, and the cubic boron nitride-based sintered material includes a binding phase containing at least one selected from a group consisting of: titanium nitride; titanium carbide; titanium carbonitride; titanium boride; aluminum nitride; aluminum oxide; inevitable products; and mutual solid solution thereof, around the cubic boron nitride particles.
Abstract translation:具有优异的耐崩裂性和耐磨性的cBN工具; 并提供优异的切割性能,即使在高硬度钢上进行间歇切割加工也能长期使用。 切削工具包括:切削工具主体,其是立方氮化硼基材料,其包含立方氮化硼颗粒作为硬相成分。 在切割工具中,立方氮化硼颗粒包括在立方氮化硼颗粒的表面上平均层厚度为1.0-10nm的Al 2 O 3层,平均裂缝形成比为0.02-0.20的裂纹为 形成在所述Al 2 O 3层中,所述立方氮化硼系烧结体包含含有选自氮化钛中的至少一种的结合相, 碳化钛; 碳氮化钛; 硼化钛 氮化铝; 氧化铝 不可避免的产品; 和其相互固溶体,在立方氮化硼颗粒周围。