1367 results about "Alloy substrate" patented technology

The invention discloses a method for preparing single-layer graphene. The method comprises the following steps of: 1) preparing an alloy substrate; and 2) in the hydrogen and inert atmosphere, catalyzing to grow graphene on the surface of the alloy substrate obtained in the step 1) by a chemical vapor deposition method, thereby finishing the preparation of the single-layer graphene. The method makes use of the characteristics of two or more alloy metals in the alloy substrate, realizes control on the decomposition, diffusion and precipitation processes of a carbon source, simply and efficiently restrains the precipitation process of carbon dissolved in the metal substrate to enable the graphene to be capable of growing in a surface catalytic manner to obtain the single-layer graphene withuniform layer distribution, and is suitable for industrial production and particularly for the controllable preparation of single-layer or few-layer graphene.

In the multi-layer-coated member composed of an ultra-hard alloy substrate and a multi-layer coating formed thereon, the multi-layer coating comprises two or more first layers each composed of at least one of carbides, nitrides and carbonitrides of elements of Groups 4a, 5a and 6a of the Periodic Table and Al, and two or more second layers each composed of at least one of oxides, carboxides, oxinitrides and carboxinitrides of elements of Groups 4a, 5a and 6a of the Periodic Table and Al laminated alternately. The first layers adjacent via the second layer are continuous in crystal orientation.

A method for fabricating diamond nanopillars includes forming a diamond film on a substrate, depositing a metal mask layer on the diamond film, and etching the diamond film coated with the metal mask layer to form diamond nanopillars below the mask layer. The method may also comprise forming diamond nuclei on the substrate prior to forming the diamond film. Typically, a semiconductor substrate, an insulating substrate, a metal substrate, or an alloy substrate is used.

A coated electrically conductive substrate has particular utility where there are multiple closely spaced leads and tin whiskers constitute a potential short circuit. Such substrates include leadframes, terminal pins and circuit traces such as on printed circuit boards and flexible circuits. This electrically conductive substrate has a plurality of leads separated by a distance capable of bridging by a tin whisker, a silver or silver-base alloy layer coating at least one surface of at least one of the plurality of leads, and a fine grain tin or tin-base alloy layer directly coating said silver layer. An alternative coated electrically conductive substrate has particular utility where debris from fretting wear may oxidize and increase electrical resistivity, such an in a connector assembly. This electrically conductive substrate has a barrier layer deposited on the substrate that is effective to inhibit diffusion of constituents the substrate into a plurality of subsequently deposited layers. The subsequently deposited layers include a sacrificial layer deposited on the barrier layer that is effective to form intermetallic compounds with tin, a low resistivity oxide metal layer deposited on said sacrificial layer, and an outermost layer of tin or a tin-base alloy directly deposited on the low resistivity oxide metal layer. In this alternative embodiment, the barrier layer is preferably nickel or a nickel-base alloy and the low resisitivity oxide metal layer is preferably silver or a silver-base alloy. When heated, the coated substrate of this second embodiment forms a unique structure having a copper or copper-base alloy substrate, an intervening layer formed from a mixture or metals including copper and tin, and an outermost layer which is a mixture of a copper-tin intermetallic containing phase and a silver-rich phase. It is believed that this silver-rich phase is particularly beneficial to reduce an increase in resistivity due to oxidation of fretting wear debris.

A bright finish aluminum alloy on high strength aluminum or aluminum alloy lamination is disclosed including a bright finish top sheet, a high strength aluminum or aluminum alloy substrate, and an adhesive bonding the bright finish metal top sheet to the high strength aluminum or aluminum alloy substrate to provide a bright finish aluminum on high strength aluminum or aluminum alloy lamination product having brighter finish than a sheet product of said high strength aluminum or aluminum alloy and higher strength than a sheet product of said bright finish aluminum of the same thickness as said lamination product, wherein said lamination product withstands galvanic corrosion. In one aspect, the bright finish metal top sheet is 5657 aluminum foil. In one aspect, the high strength aluminum alloy is 5182 alloy sheet.

The invention relates to a thermal barrier coating part electromagnetic eddy current thermal imaging non-destructive detection system and a detection method thereof. The detection system comprises an electromagnetic heating device connected with a thermal barrier coating part requiring detection, an infrared thermal imager, and a computer connected with the infrared thermal imager. The detection method comprises that: a conductor coil of the electromagnetic heating device is wound on a thermal barrier coating part requiring detection, the conductor coil is connected with a power supply system, the infrared thermal imager is adopted to carry out infrared image acquisition on a coating surface temperature field of the thermal barrier coating part requiring detection, the acquired image is input into the computer, and computer processing is performed to finally obtain the detection result. According to the present invention, electromagnetic induction is adopted to heat a high temperature alloy substrate, and the ceramic coating surface temperature field is monitored to obtain defect distribution; heat generated by eddy current is uniformly distributed, the detection result has high accuracy, and errors due to different heat flow injection directions are avoided; the detection process does not cause damage on the thermal barrier coating part requiring detection; and detection speed is rapid, efficiency is high, operation is convenient, and cost is low.

The invention relates to a method for preparing a super-hydrophobic surface with metal corrosion protection and self-cleaning functions, which comprises the following steps: 1) washing a metal or an alloy substrate clean by using acetone, deionized water and ethanol sequentially; 2) using the cleaned metal or the alloy substrate as an anode and a cathode respectively and putting the anode and the cathode into a fatty acid CH3(CH2)n-2COOH electrolyte solution with the concentration of between 0.001 and 0.5 mol per liter, wherein n is equal to between 10 and 14; and applying voltage of between 0.5 and 25 volts between the cathode and anode to perform an electrochemical reaction for 0.5 to 6 hours so as to deposit a layer of a fatty acid salt super-hydrophobic surface with the metal corrosion protection and self-cleaning functions on the surface of the metal or the alloy substrate serving as the cathode. The method has simple operation and low equipment requirement, is not limited by the shape of a substrate, is easy to achieve industrialization, and has comparatively wide practical value.

The present invention provides composite reinforcing treatment process for aluminum or aluminum alloy substrate surface through both ion implantation and deposition. The present invention solves the problems of great residual stress, lower binding force and poor bearing capacity of diamond-like carbon film on aluminum or aluminum alloy substrate, and the low wear resistance of DLC film under high speed and heavy load condition. The composite reinforcing treatment process includes the following steps: ultrasonic cleaning of aluminum or aluminum alloy substrate; Ar ion sputtering cleaning; Ti ion implantation; PIIID deposition of Ti film; PIIID deposition of TiN film; PIIID deposition of Ti(CN) film; PIIID deposition of TiC film and synthesis of diamond-like carbon film. All the steps but the first mentioned one are completed in vacuum chamber. The DLC film of the present invention has 10 times over raised wear life compared with single DLC film in the same thickness and friction coefficient lower than 0.1.

This invention provides a method for modifying the surface properties of a Si or Si alloy substrate by performing repeated etch-grow cycles of thermal oxide to yield a more defect free substrate with a more uniform nucleating surface which provides an improved interface for dielectric formation. Additionally, this method of processing does not expose the substrate to ambient atmosphere and preserves the improved surface until subsequent processing steps are performed.

The invention provides a water-based porcelain film coating. The formula of the water-based porcelain film coating comprises the following components in parts by weight: 45% to 55% of colloidal silica dispersion liquid, 30% to 45% of a silane coupling agent, 5% to 15% of an inorganic pigment, 2% to 5% of alumina packing, 0.5% to 1% of a flatting agent, 1% to 2% of hydroxy silicone oil with low molecular weight and 1% to 1.5% of an organic acid catalyst, wherein the colloidal silica dispersion liquid is prepared by mixing colloidal silica with big and small particle diameters according to the mass ratio of (1-3):1, wherein the particle diameters of the colloidal silica with the small particle diameters are distributed within 10nm to 15nm while the particle diameters of the colloidal silica with the big particle diameters are distributed within 40nm to 50nm; the silane coupling agent is prepared by mixing methyl trimethoxysilane and methyl triethoxysilane according to the mass ratio of (1-2):1; the organic acid catalyst can be a formic acid or an acetic acid or can be a mixture of the formic acid and the acetic acid. The water-based porcelain film coating has the good adhesive force and the good waterproof and cohesive-proof on an aluminum alloy substrate.

The invention relates to a three-dimensional orthotropic carbon fiber reinforced aluminum-based composite material and a preparation method thereof in the technical field of carbon fibers. The material consists of the following components in percentage by volume: 30 to 60 percent of carbon fiber reinforcement and 40 to 70 percent of aluminum or aluminum alloy substrate, wherein the aluminum or aluminum alloy substrate comprises the following components in percentage by mass: 0 to 13 percent of Si, 0 to 11 percent of Mg, 0 to 10 percent of Zn, 0 to 8 percent of Cu, 0 to 2 percent of Mn, 0 to 1 percent of Ti and the balance of Al. The defect when a three-dimensional orthotropic carbon fiber structure is compounded with metal in the prior art is effectively overcome, three-dimensional orthotropic carbon fibers are taken as the reinforcement in the metal-based composite material, and the compounding of the three-dimensional orthotropic carbon fibers and aluminum or an aluminum alloy is realized.

A corrosion resistant electrically conductive component that can be used as a bipolar plate in a PEM fuel cell application is composed of an alloy substrate which has 10-30 wt. % Cr, 0.5 to 7 wt. % V, and base metal being Fe, and a continuous surface layer of chromium nitride and vanadium nitride essentially free of base metal. A oxide layer of chromium vanadium oxide can be disposed between the alloy substrate and the continuous surface nitride layer. A method to prepare the corrosion resistant electrically conductive component involves a two-step nitridization sequence by exposing the alloy to a oxygen containing gas at an elevated temperature, and subsequently exposing the alloy to an oxygen free nitrogen containing gas at an elevated temperature to yield a component where a continuous chromium nitride layer free of iron has formed at the surface.

An aluminum alloy substrate for a magnetic disk includes 0.5 mass % or more and 24.0 mass % or less of Si, 0.01 mass % or more and 3.00 mass % or less of Fe, and the balance of Al and unavoidable impurities. The aluminum alloy substrate for a magnetic disk includes a smooth plated surface and has high rigidity.

The invention relates to a process for anodizing an aluminum-alloy substrate. The process comprises the following steps of: (S1) degreasing; (S2) washing for the first time; (S3) washing by an alkali; (S4) washing for the second time; (S5) polishing; (S6) washing for the third time; (S7) anodizing; (S8) washing for the fourth time; (S9) carrying out electrolytic coloring; (S10) washing for the fifth time; (S11) sealing holes; (S12) washing for the sixth time to finally obtain a dense anodic oxide film. The whole anodizing process is carried out in the environment of normal temperature, less energy is consumed, the sulfuric acid used for anodizing can be reused for degreasing, the utilization rate of raw materials is high, the production cost is low, the holes are sealed after carrying out the anodizing reaction, the anodizing film can effectively protect the aluminum and the aluminum-alloy, the surface of the anodizing film has no honeycomb-like porous structure, is highly smooth and can be kept to be smooth for a long time.

The invention provides a preparation method of a titanium alloy thin-wall honeycomb structure. The preparation method comprises the steps that (a) a titanium alloy thin-wall honeycomb structure model is sliced and layered according to 20-30 mu m layer thickness; (2) titanium alloy powder is uniformly paved on a titanium alloy substrate, a laser beam which is emitted by a laser is used for selectively melting a titanium alloy powder layer according to the determined scan locus of the laser beam to complete the processing of one layer of titanium alloy thin-wall honeycomb structure; (c) the titanium alloy powder is paved on the layer of formed titanium alloy thin-wall honeycomb structure again, the laser beam which is emitted by the laser is used for selectively melting the titanium alloy powder layer according to the determined scan locus of the laser beam; (d) the titanium alloy thin-wall honeycomb structure is processed layer by layer, and the titanium alloy thin-wall honeycomb structure is finally formed. According to the method, the stress accumulation and the deformation of a forming piece in the forming process are reduced, the flexibility degree is high, and a thin-wall honeycomb component with variable honeycomb distance and a three-dimensional dot matrix structure can be prepared.

The invention provides a preparation method of a metal resin complex and the metal resin complex prepared thereby. The preparation method of the metal resin complex comprises the following steps: S1, micropores are formed on the surface of a pretreated metal substrate, and the metal substrate is an aluminum alloy substrate or aluminum substrate; S2, the metal substrate having the micropores on the surface thereof and obtained by the step S1 is soaked in a water-soluble polymer solution for modification; and S3, the surface of the treated metal substrate modified by soaking in the step S2 is coated with a resin composition, and after molding the metal resin complex is obtained. In the metal resin complex, the binding force between metal and resin is strong, and the process is simple, is easy for large-scale production, and has no pollution.