摘要:
A light-weight composite material with enhanced structural characteristics includes, in one embodiment, a compositionally modulated nanolaminate coating electrically deposited into an open, accessible void structure of a porous substrate. As a result of including a nanolaminate within the void structure, the composite can include a greater amount of nanolaminate material per unit volume than can be achieved by depositing a nanolaminate material solely on a two-dimensional surface. In addition, the nanolaminate material as well as other material electrodeposited to form the composite is compositionally modulated so that discontinuities between layers are minimized and potentially eliminated. The light-weight but structurally enhanced composite material can be used in a number of different applications including, but not limited to, ballistic applications (e.g., armor panels or tank panels), automotive protection applications (e.g., car door panels, racing shells) and sporting equipment applications (e.g., golf club shafts and tennis racket frames).
摘要:
Devices for modification of a microwave signal using a magnetically saturated ferrite magnetoelectric device with electrical control are disclosed. The device is useful for microwave resonators, band pass filters, delay lines and phase shifters.
摘要:
Devices for modification of a microwave signal using a magnetically saturated ferrite magnetoelectric device with electrical control are disclosed. The device is useful for microwave resonators, band pass filters, delay lines and phase shifters.
摘要:
The invention relates to a component made from aluminium material with a partial or complete coating of the surfaces for brazing and method for production of the coating. According to the method, fine-grain particulate brazing material is at least partly fused by means of a low temperature plasma beam and spayed onto the surfaces of the component in fused form, whereby the brazing agent forms a uniform good adhesion to the surfaces of the component. The application of the brazing agent can occur at any region of the surfaces of the component, for example, even on the edges. The particular advantage of said method is that a precisely dosed, uniform and well adhering coating of brazing agent can be achieved, whereby the use of solvents and binders can be avoided in the production process which is environmentally-friendly.
摘要:
A wear-resistant component of a carbon seal includes a surface and a coating applied onto the surface. The coating is a chromium carbide-nickel chromium composition constituting between about 75% and about 85% by weight chromium carbide and between about 15% and about 25% by weight nickel chromium. The chromium carbide-nickel chromium composition is applied onto the surface by high velocity oxy-fuel spraying (HVOF).
摘要:
Method for forming a unitary component from a plurality of powder metallurgy compacts. The method in some embodiments includes fluidizing first and second surfaces, wherein a first powder metallurgy compact defines the first surface and a second powder metallurgy compact defines the second surface. The method also includes joining the fluidizing first and second surfaces to form a bonded structure and thermally treating the bonded structure to fuse the first and second compacts into a unitary component.
摘要:
A stabilized, chemically reactive, metallic nano-material effective for degradation of chlorinated organic compounds in soils, sediments and groundwater. The nano-material is composed of a magnetic metal nanoparticle and a carbohydrate stabilizer bound to the nanoparticle. The preferred metal nanoparticle is iron and the preferred carbohydrate stabilizer is either a starch or a water soluble cellulose such as sodium carboxymethyl cellulose. The nanoparticle may be either mono-metallic, bi-metallic or multi-metallic in nature, but is preferably bi-metallic wherein it is coated with a secondary catalytic metal coating, preferably palladium. A method of making the metallic nano-material is further disclosed wherein a solution of the metal nanoparticle and carbohydrate stabilizer is prepared, and the nanoparticle is then reduced under inert conditions. A process for reductive dechlorination of chlorinated organic compounds is also disclosed wherein the reduced magnetic metal nanoparticle is prepared, and then contacted with a chlorinated organic compound to dechlorinate the compound. Preferably, the nano-material is injected into a site such as soil subsurface or groundwater contaminated with a chlorinated organic compound to provide in-situ dechlorination.
摘要:
Structures and methods for hindering molded part deformation during densification are discussed. Such devices and techniques can help alleviate stresses that tend to result in part deformation during firing, sintering, or other densification processes, and thus reduce the need for secondary straightening operations post-densification. In some instances, a support structure is utilized to orient a molded greenbody in a preferred direction to reduce deformation during firing (e.g., orienting a thin tail section is a plane parallel to the direction of gravity). The support structure can also be part of, or the entirety of, a thermal mass to help alleviate stresses that lead to part deformation. Though such structures and methods can be used for any molded piece, it can be particularly used to create a portion, or an entirety of, a medical device such as a jaw of an surgical instrument.
摘要:
There is provided a method for depositing a modified MCrAlY coating on a surface of a gas turbine engine component. The method includes cold gas dynamic spraying techniques to provide a metallurgical bond between a substrate, such as a superalloy substrate, and the modified MCrAlY composition. The method further includes post deposition heat treatments including hot isostatic pressing. The modified MCrAlY composition includes one or more elements of Pt, Hf, Si, Zr, Ta, Re, Ru, Nb, B, and C, which improves the corrosion and environmental resistance of the coated component
摘要:
A composite chromium plating film containing hard particles in network-shaped microcracks, a surface-occupying ratio of the microcracks being 10 to 20% by area, a distribution density of the microcracks being 1,200 to 2,500/cm, and the amount of the above hard particles being 1 to 15% by mass per 100% by mass of the above entire plating film. This composite chromium plating film has excellent wear resistance and scuffing resistance with small attacking ability to a mating member.