Abstract:
Structural parts of portable electronic devices are made from a synthetic resin coated with a metal. The parts are lightweight while having good physical properties such as stiffness. They are useful devices such as cell phones, portable DVD players, and personal digital assistants.
Abstract:
A process for in situ electroforming a structural reinforcing layer of selected metallic material for repairing an external surface area of a degraded section of metallic workpieces, especially of tubes and tube sections, is described. Preferably, the metal layer coatings are made of fine-grained metals, metal alloys or metal matrix composites. The plating system can be used on straight tubes, tube joints to different diameter tubes or face plates, tube elbows and other complex shapes encountered in piping systems. A suitable apparatus is assembled on or near the degraded site and is sealed in place to form the plating cell. Also described is a process for plating "patches" onto degraded areas by selective plating including brush plating.
Abstract:
Sacrificial inserts for use in gas turbine engines to reduce friction and wear damage between compressor fan blades and the fan rotors are disclosed. The consumable metallic shims have low friction and reduce fretting and galling on fan blade roots and fan rotor dovetail slots thereby increasing their operating lives, as well as reduce engine noise and improve engine efficiency. The electroformed, compliant, multi-purpose shims may have variable thickness and, when positioned between the blade dovetail root and the rotor disk dovetail slot, prevent movement and slippage between air foil blades and the rotor.
Abstract:
Articles including durable and icephobic polymeric coatings are disclosed. The polymeric coatings include a bonding layer which may contain a substantially fully cured polymeric resin providing excellent adhesion to metallic or polymer substrates. The polymeric coating further includes an outer surface layer which is smooth, hydrophobic and icephobic and, in addition to a substantially fully cured resin, contains silicone comprising additives near the exposed outer surface. The anisotropic polymeric coatings are particularly suited for strong and lightweight parts required in aerospace, automotive and sporting goods applications. A process for making the articles is disclosed as well.
Abstract:
Sacrificial inserts for use in gas turbine engines to reduce friction and wear damage between compressor fan blades and the fan rotors are disclosed. The consumable metallic shims have low friction and reduce fretting and galling on fan blade roots and fan rotor dovetail slots thereby increasing their operating lives, as well as reduce engine noise and improve engine efficiency. The electroformed, compliant, multi-purpose shims may have variable thickness and, when positioned between the blade dovetail root and the rotor disk dovetail slot, prevent movement and slippage between air foil blades and the rotor.
Abstract:
Metal-clad polymer articles containing structural fine-grained and/or amorphous metallic coatings/layers optionally containing solid particulates dispersed therein. The fine-grained and/or amorphous metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling although the CLTE of the metallic layer and the one of the substrate is mismatched. The interface between the metallic layer and the polymer is suitably pretreated to withstand thermal cycling without failure.
Abstract:
Free standing articles or articles at least partially coated with substantially porosity free, fine-grained and/or amorphous Co-bearing metallic materials optionally containing solid particulates dispersed therein, are disclosed. The electrodeposited metallic layers and/or patches comprising Co provide, enhance or restore strength, wear and/or lubricity of substrates without reducing the fatigue performance compared to either uncoated or equivalent thickness chromium coated substrate. The fine-grained and/or amorphous metallic coatings comprising Co are particularly suited for articles exposed to thermal cycling, fatigue and other stresses and/or in applications requiring anti-microbial properties.
Abstract:
An article of manufacture includes a substrate having an outer surface clad with a metal construct including one or more continuous metal layers, at least one of which is an amorphous layer or a microcrystalline layer having a grain size below 5000 nm. A bonding layer is provided between the substrate and the layered metallic construct so that the bonding layer is in direct contact with the substrate and with the layered metallic construct. The bonding layer is made of a substantially fully cured resin including at least 10% of a rubber. The layered metallic construct has peel strength greater than 10N/cm. Also provided is a process for making the article including coating an article outer surface with a bonding layer and a layered metallic construct. The bonding layer is substantially fully cured before the layered metal construct is bonded to the article. The coated article is annealed.
Abstract:
Un procedimiento de preparación de al menos un depósito metálico de propiedad variable,que comprende las etapas de - depositar electrolitícamente de forma continua un material metálico de un baño de electrolito acuoso en unacelda electrolítica única que tiene al menos un ánodo y al menos un cátodo, en el que la composición delbaño es selectiva y reversiblemente modulada por una o más etapas que comprendenel uso de dos ánodos con control de corriente individual; añadir componentes utilizando una bomba dosificadora, agitación por aire para oxidar selectivamente componente de baño, agitación para mantener las partículas ensuspensión para que se depositan; añadir, modificar o eliminar de los componentes del baño a través de un bucle de circulación de fluido, ymezclar a fin de afectar a la(s) concentración(concentraciones) de iones local(es) en la superficie del cátodo,en el que los parámetros de electrodeposición son densidad de corriente promedio que varía de 5 a 10 000 mA/cm2, pulso directo de trabajo que varía de 0,1 a 500 ms, pulso de reposo que varía de 0 a 10 000 ms, pulso inverso de trabajo que varía de 0 a 500 ms, densidad máxima de corriente directa que varía de 5 a 10 000 mA/cm2; densidad máxima de corriente inversa que varía de 5 a 20 000 mA/cm2; frecuencia que varía de 0 a 1 000 Hz; un ciclo de trabajo que varía de 5 a 100%; temperatura del baño que varía de 0 a 100°C; velocidad de rotación del electrodo de trabajo que varía de 0 a 1 000 rpm; cuando se utilizan dos o más ánodos solubles de diferentes composiciones, la fracción de corriente media encada ánodo que varía de 5 a 95%; velocidad de agitación del baño que varía de 1 a 6 000 ml/(min cm2); la dirección del flujo de baño en elcátodo que varía desde incidente (perpendicular) a tangencial; apantallar el ánodo cubriendo entre el 0 al 95% del área geométrica de superficie del ánodo; y contenido de baño de partículas electroquímicamente inerte que varía del 0 al 70% en volumen; y - modular al menos uno de estos parámetros durante la electrodeposición para causar la variación en unapropiedad de depósito en más de un 10% para variar al menos una propiedad seleccionada del grupo queconsiste en tamaño de grano, dureza, límite de fluencia, módulo de Young, resistencia, límite elástico, ductilidad, tensiónde depósito interno o residual, rigidez, composición química, coeficiente de expansión térmica, coeficiente defricción, conductividad eléctrica, fuerza coercitiva magnética; y en el caso de electrodepósito de materiales dematriz metálica, volumen de partículas fracción de partículas tamaño de partículas, forma de partículas y/oquímica de partículas, en el que depositar electrolícamente es no sólo para causar variación en más de un 10% en propiedad a lolargo de la profundidad del depósito, sino también a lo largo de la longitud y/o anchura del depósito; y - proporcionar un espesor de depósito que varía desde 20 mm a 5 cm que tienen una microestructura de45 grano fino con un tamaño promedio de grano que varía desde 2 nm a 10 000 nm a lo largo de 1,5 nm a 5 cmde dicho espesor.