94 results about "Base metal alloy" patented technology

An abradable coating composition for use on shrouds in gas turbine engines or other hot gas path metal components exposed to high temperatures containing an initial porous coating phase created by adding an amount of inorganic microspheres, preferably alumina-ceramic microballoons, to a base metal alloy containing high Al, Cr or Ti such as β-NiAl or, alternatively, MCrAlY that serves to increase the brittle nature of the metal matrix, thereby increasing the abradability and oxidation resistance of the coating at elevated temperatures. Coatings having a total open and closed porosity of between 20% and 55% by volume due to the presence of ceramic microballoons ranging in size from about 10 microns to about 200 microns have been found to exhibit excellent abradability for applications involving turbine shroud coatings. An abradable coating thickness in the range of between 40 and 60 ml provides improved performance for turbine shrouds exposed to gas temperatures between 1380° F. and 1800° F. Abradable coatings in accordance with the invention can be used for new metal components or to repair existing equipment. The coatings can be applied to the metal shroud using thermal spray, processes that integrate sintering and brazing, or direct write techniques.

The present invention relates to variable melting point solder formulations. The solder is comprised of at least one base metal or base metal alloy, preferably alloyed with at least one melting point depressant metal, such that the solidus point of the solder composition is reduced to an initial solidus temperature. Said base metal or base metal alloy, alloyed with at least one melting point depressant metal is mixed with at least one additive metal or additive metal alloy. When heated to a process temperature above said initial solidus temperature, a reaction occurs between the melting point depressant metal, and the additive metal, such that solidification occurs at the process temperature via the formation of intermetallic phases, effectively increasing the solidus of the base metal, and of the overall solder.

System for repairing worn surfaces of steam turbine components and especially high pressure turbine rotors, are disclosed. These systems include depositing a first layer of weld metal on a worn surface of the component, whereby a heat-affected zone is created. A second layer of weld metal is then deposited over the first layer using a greater amount of heat to temper at least a portion of the heat-affected zone produced by the first layer. The preferred embodiments include the use of gas tungsten arc welding for providing fine-grain size and more creep resistance, especially in the weld and heat-affected zone. The resulting build-up can be machined, for example into a blade fastening to produce a component having properties equal to or better than the base-metal alloy. The invention also provides a longer lasting turbine system, including rotors which have serrated steeples that are more resistant to failure.

The present invention relates to a method and apparatus for treating materials such as copper or copper based metal alloys, used in fabricating semiconductor devices with an ozone solvent solution and avoiding damage to metals by corrosion. The invention is also applicable to treating of materials such as copper and copper based alloys for the purpose of forming a protective layer on the exposed metal surface for protection of those copper surfaces from damage or corrosion caused by subsequent exposure to other liquid, gas, or plasma environments. This can be achieved by properly selecting the composition of the ozone solvent solution and controlling the pH and ORP of the ozone-solvent solution while avoiding the use of certain chemical constituents in the ozone solvent solution.

An electrode catalyst for a fuel cell includes a conductive support, and catalytic particles loaded on the conductive support. The catalytic particles include platinum and a base metal being on the lower end of the electrochemical series with respect to platinum. The number of the atoms of the base metal, forming metallic oxides without alloying with the platinum, is less than 5 atomic % of the number of the atoms of the platinum on a surface of the catalytic particles. The electrode catalyst is produced by loading the platinum and base metal on the conductive support, alloying the platinum and base metal thereon by a heat treatment, thereby making the catalytic particles, and removing metallic oxides from a surface of the catalytic particles. The electrode catalyst is less expensive comparatively, exhibits high catalytic activities, and hardly lowers the battery performance of fuel cells.

A reflective metrological scale has a scale pattern of elongated side-by-side marks surrounded by reflective surface areas of a substrate, which may be a nickel-based metal alloy such as Invar TM or Inconel TM and may be a thin and elongated flexible tape. Each mark has a furrowed cross section and may have a depth in the range of 0.5 to 2 microns. The central region of each mark may be rippled or ridged and may be darkened to provide an enhanced optical reflection ratio with respect to surrounding reflective surface areas. A manufacturing method includes the repeated steps of (1) creating a scale mark by irradiating a surface of the substrate at a mark location with a series of overlapped pulses from a laser, each pulse having an energy density of less than about 1 joule per cm<2>, and (2) changing the relative position of the laser and the substrate by a displacement amount defining a next mark location on the substrate at which a next mark of the scale is to be created.

A method for applying a NiAl based bond coat and a diffusion aluminide coating to a metal substrate comprises, in part, coating a portion of the external surface of the superalloy substrate, by physical vapor deposition with a layer of a NiAl based metal alloy, wherein the deposited NiAl based metal alloy includes a controlled amount of about 6 to 25 weight percent aluminum, wherein the deposited aluminum level of the NiAl based metal alloy is controlled to be about 50-100% of its final level after aluminizing to form a coated external portion; and subsequently, simultaneously aluminizing the coated external portion and a different surface of the superalloy substrate.

An article of iron base metal base metal alloyed with an alloying element is prepared by mixing a chemically reducible nonmetallic base-metal precursor compound of the iron base metal and a chemically reducible nonmetallic alloying-element precursor compound of an alloying element to form a compound mixture. The alloying element is preferably thermophysically melt incompatible with the iron base metal. The method further includes chemically reducing the compound mixture to a metallic alloy, without melting the metallic alloy, and thereafter consolidating the metallic alloy to produce a martensitic-composition consolidated metallic article, without melting the metallic alloy and without melting the consolidated metallic article.

The invention relates to an electrothermal organic electrode slurry for a heater. The slurry comprises the following main components in percentage by weight: 5-30% of epoxy modified high polymer, 2-6% of flame-retardant temperature-resistant high polymer, 3-6% of latent curing agent, 1-2% of latent curing promoter, 5-10% of silicon modified high polymer, 50-70% of superfine metal powder conductive filler, 1-3% of antioxidant assistant, 0-5% of base metal alloy powder conductive filler and a small amount of functional auxiliary phase. The invention solves the problem that the ordinary slurry is difficult to realize thin type, light type or special type, has the characteristics of low-temperature curing and high-temperature use, ensures direct printing or spraying and satisfies the technical development requirements of small type, thin type, light type (shape and application) and special type of the electric heater.

Coatings comprising metallurgical slag are applied to refractory substrates having molten metal-contacting surfaces to create a chemically active and viscous surface that dramatically increases the ability of the treated substrate to remove slag, dross and other inclusions from a base metal alloy as it passes through or contacts the substrate. The refractory substrates include molten metal filters used by foundries and metal casters such as reticulated ceramic foam, cellular/honeycomb, silica mesh, and others that rely on their physical or sieving ability to remove particulate impurities from the base alloy being cast. The chemically active surfaces significantly increase filtration efficiency through a treatment process tailored to the specific chemistry of the alloy being filtered, such as ferrous metals that include iron, steel and more. Other refractory substrates such as aluminum oxide, magnesium oxide, zirconium oxide, aluminum silicate, silicon carbide (as common with reticulated ceramic foam filters) and the like may also include the coatings.

Orthopaedic implants are formed using processes whereby a metal alloy is cooled at a rate rapid enough that an amorphous or partially amorphous structure is retained. In the preferred embodiment, the metal alloy is a calcium-based metal alloy. The fabrication process may include die-casting or additive manufacturing process of the type wherein material increments are consolidated in accordance with the description without melting the material in bulk. Such processes include ultrasonic consolidation, electrical resistance consolidation, and frictional consolidation. The material increments are provided in the form of sheets, elongated tapes, filaments, dots or droplets. A preferred method includes a casting process to produce an initial form having an outer surface followed by an additive manufacturing process used to build up at least a portion of the outer surface. For example, the portion may include an intramedullary stem, bone-ingrowth surface, or articulating surface.

The invention relates to an energy-saving intermittent pulse-feeding technology of a closed submerged arc furnace. The feeding method of the closed submerged arc furnace is a smelting intermittent pulse-feeding mode of the closed (semi-closed) submerged arc furnace, which is proposed after various smelting principles and a plurality of special factors are deeply researched and can be applied to the smelting of calcium carbide, yellow phosphorus, silicon-based metal alloys (ferrosilicon, calcium silicon, barium ferrosilicon, metallic silicon, and the like), manganese-based metal alloys (ferromanganese, silicon manganese, metallic manganese, and the like), nickel-based metal alloys, chrome-based metal alloys, tammite, ferrotitanium, and the like or other smelting. The technology enables a domestic closed furnace using general raw materials to lower the power ton consumption by 3-10 percent and increase the yield by 2-20 percent and benefit the safe and stable operation of subsequent environment-friendly dedusting equipment and the implementation of an unmanned control technology of submerged arc furnaces, thereby having a profound popularization meaning and development potential on various large-scale closed submerged arc furnaces over 25*10<6> VA.

The technique of the present invention attains simple and accurate evaluation of the performance of a fuel cell and enables produce of a high-performance electrode catalyst and a high-performance fuel cell. The procedure makes platinum, a noble metal, and iron, a base metal, carried on carbon having a large specific surface area, and heats up the carbon with platinum and iron to a specific temperature to reduce iron. A resulting platinum-iron alloy electrode catalyst exerts excellent catalytic functions. A fuel cell using this electrode catalyst has a high IR compensation voltage. The quantity of carbon monoxide adsorbed by this novel electrode catalyst is not less than 14 Ncc per one gram of platinum. The atomic number ratio of iron (Fe) to platinum (Pt) in the catalyst is not lower than 0.14 by EDX analysis, and the ratio of the binding number of Pt atom with Fe atom to the total binding number relating to Pt atom is not lower than 0.10 by EXAFS analysis. Each electrode catalyst produced is evaluated by measurement of these data. The fuel cell including the electrode catalyst having the favorable result of evaluation ensures the desired performances.

Zirconium-based metal alloy compositions comprise zirconium, a first additive in which the permeability of hydrogen decreases with increasing temperatures at least over a temperature range extending from 350° C. to 750° C., and a second additive having a solubility in zirconium over the temperature range extending from 350° C. to 750° C. At least one of a solubility of the first additive in the second additive over the temperature range extending from 350° C. to 750° C. and a solubility of the second additive in the first additive over the temperature range extending from 350° C. to 750° C. is higher than the solubility of the second additive in zirconium over the temperature range extending from 350° C. to 750° C. Nuclear fuel rods include a cladding material comprising such metal alloy compositions, and nuclear reactors include such fuel rods. Methods are used to fabricate such zirconium-based metal alloy compositions.

The invention provides an ultra-light high-modulus high-strength casting aluminum-lithium matrix composite and a preparation method thereof. The aluminum-lithium matrix composite comprises a matrix alloy and a strengthening phase, the matrix alloy comprises the following elements of, by mass, 2.5%-3.5% of Li, 1%-2.5 % of Cu, 0.4%-0.5% Mg, 0.15%-0.2% of Sc, 0.15%-0.2% Zr, 0-0.2% of Cd, less than 0.2% of the total content of impurity elements and the balance Al; and the strengthening phase is TiB2. The preparation method comprises the steps that Ti B2/Al base metal alloy is prepared by using in-situ synthesized reaction; and then the TiB2/Al base metal alloy, pure aluminum and Al-Cu, Al-Li and other intermediate alloys are smelted to obtain a composite, and after specific solid solution andaging treatment are carried out, the ultra-light high-modulus high-strength casting aluminum-lithium matrix composite is obtained. The ultra-light high-modulus high-strength casting aluminum-lithium matrix composite has higher strength and elastic modulus and lower density, and has lower cost meanwhile.

A method for preparing an article of a base metal alloyed with an alloying element includes the steps of preparing a compound mixture by the steps of providing a chemically reducible nonmetallic base-metal precursor compound of a base metal, providing a chemically reducible nonmetallic alloying-element precursor compound of an alloying element, and thereafter mixing the base-metal precursor compound and the alloying-element precursor compound to form a compound mixture. The compound mixture is thereafter reduced to a metallic alloy, without melting the metallic alloy. The step of preparing or the step of chemically reducing includes the step of adding an other additive constituent. The metallic alloy is thereafter consolidated to produce a consolidated metallic article, without melting the metallic alloy and without melting the consolidated metallic article.

The invention discloses a garbage truck body which comprises a garbage truck body itself. An anti-corrosion layer is arranged on the inner surface of the garbage truck body. An insulating layer is arranged on the outer surface of the anti-corrosion layer and is smaller than the garbage truck body itself in thickness. The anti-corrosion layer is made of aluminum-base metal alloy. The insulating layer is made of phenolic resin materials. According to the garbage truck body, the anti-corrosion layer is arranged on the inner surface of the garbage truck body, and the insulating layer is arrange outside the anti-corrosion layer so as to effectively insulate corrosion damage of collected garbage to the truck body itself, prolong the service life of a garbage truck, and reduce maintenance cost.

The silicon content of the silica-based metal alloy film of the invention is 62-85% in terms of weight percent, the remaining weight percent is metals selected from clusters of aluminum, nickel, titanium, zinc or the combination of the metals. Furthermore, the silica-based metal alloy film is arranged on the case, e.g. case surface of the electronic device can be manufactured into an electronic device provided with the silica-based metal alloy film. The silica-based metal alloy film of the invention can not generate dampening to any electromagnetic signals, has metal glossiness and texture so as to add product values, and has the efficacies of unlikely color change, high defect-free yield, tiny difference in color among batches, good weather-proofing, strong adhesiveness, long storage time for semi-finished products and the like. In addition, the silica-based metal alloy film can be directly applied to inner die emitting technique of high yield to increase output, and can be manufactured by using direct current sprinkle plating method with low cost, thus reducing production cost.

The invention discloses a method for preparing a single-phase SmCo7 nanocrystalline alloy block material without doping elements, which belongs to the technical field of nanometer materials and novel powder metallurgy. The method comprises the following steps of: mixing metals Sm and Co in the mass ratio of 26.7:73.3, and smelting the mixture to form SmCo7 alloy ingot casting base metal by using a vacuum induction smelting furnace; under the protection of argon gas, crushing the base metal alloy into powder, and placing the powder in a ball milling jar for ball milling to prepare allow powder with an amorphous structure; placing the amorphous alloy powder in a mould, and fast sintering the powder for forming by using spark plasma sintering technology to obtain the single-phase SmCo7 nanocrystalline alloy block material; and placing the single-phase SmCo7 nanocrystalline alloy block material which is obtained by the spark plasma sintering in a vacuum thermal treatment furnace for annealing. The single-phase SmCo7 nanocrystalline alloy prepared by the method has a uniform and fine organization and a pure grain boundary area without precipitated phases, and the method has a simple route, short flow and controllable technical parameters.