Abstract: The present disclosure provides a microwave-assisted carbon template method for preparing supported nano metal-oxides or nano metals. The method includes mixing a carbohydrate, urea, and a precursor of an oxide support with a metal salt in a container, adding a certain amount of water, and completely dissolving the solid chemicals through ultrasonic stirring to form a homogeneous solution. The method also includes performing microwave treatment on the obtained solution for approximately 0.1 minute to 60 minutes with a microwave heating power in a range of approximately 100 W to 50 kW to dehydrate and carbonize the carbohydrate and thus form a dark brown solid. The method further includes performing heat treatment on the dark brown solid at a temperature in a range of approximately 200° C. to 1100° C. in an air atmosphere for approximately 0.5 hour to 24 hours to obtain a metal-oxide supported by a porous oxide support.

Abstract: An embodiment relates to a composition comprising an amorphous alloy having a low coefficient of friction (COF) of 0.15 or less, wherein the amorphous alloy is substantially free of phosphor (P) and substantially free of boron (B). An embodiment relates to a method comprising solidifying a molten layer of an amorphous feedstock on a preexisting layer by controlling a heating source and a cooling rate so as to avoid formation of crystals in the molten layer and not affect a crystalline structure of the preexisting layer, and forming a specimen; wherein, the at least a portion specimen has the low COF. Another embodiment relates to a system comprising a drill string, wherein the drill string comprises a drilling bit and a drill pipe connected thereto, wherein at least a portion of the drill pipe comprises a coating having the low COF.

Abstract: A method of producing a composite material comprising: supplying a metal compound (MPC) of a product metal (MP) and a reductant (R) capable of reducing the metal compound (MPC) of the product metal (MP) to a reactor; forming a composite material comprising a matrix of oxidised reductant (R0) of the reductant (R), the product metal (MP) dispersed in the matrix of oxidised reductant (R0), and at least one of (i) one or more metal compounds (MPCR) of the metal compound (MPC) in one or more oxidation states and (ii) the reductant (R); and recovering the composite material from the reactor, wherein the metal compound (MPC) of the product metal (MP) is fed to the reactor such that it is in excess relative to the reductant (R).

Abstract: A torsional actuator formed of a yarn of twisted shape memory material. The yarn has multiple strands of homogeneous shape memory material that have been homochirally twisted. For torsional actuation, a fractional portion of the yarn is heated such as by Joule heating. Various Joule heating mechanisms include passing an electrical current through an unwound segment of the yarn, or by coating a fractional portion of the length of each homogeneous strand with a coating material of higher electrical conductivity than the electrical conductivity of the shape memory material an passing current through the length of the yarn. The shape memory material may be a shape memory alloy such as a NiTi alloy.

Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.

Abstract: Apparatuses and methods of manufacturing of thermally formed composite structures, such as a projectile firing structure, are provided.

Abstract: Producing CoxFe100-x, where x is an integer from 20 to 95, nanoparticles by: (a) providing a first aqueous hydroxide solution; (b) preparing a second aqueous solution containing iron ions and cobalt ions; and (c) depositing measured volumes of the second aqueous solution into the first aqueous solution whereby coprecipitation yields CoFe alloy nanoparticles, wherein step (c) occurs in an essentially oxygen-free environment. The nanoparticles are annealed at ambient temperatures to yield soft nanoparticles with targeted particle size, saturation magnetization and coercivity. The chemical composition, crystal structure and homogeneity are controlled at the atomic level. The CoFe magnetic nanoparticles have Ms of 200-235 emu/g, (Hc) coercivity of 18 to 36 Oe and size range of 5-40 nm.

Abstract: A manufacturing method for a shaft 1 by imparting a residual compressive stress to an inner surface 4p of the lateral hole 4 of the workpiece 2 includes a disposing step and an irradiation step. In the disposing step, a lateral-hole mirror 14a is disposed inside the lateral hole 4. In the irradiation step, a laser beam L is emitted from one of an inner-side opening 4a and an outer-side opening 4b of the lateral hole 4 toward the lateral-hole mirror 14a, making the laser beam L reflect on the lateral-hole mirror 14a, and thereby applying the laser beam L to the inner surface 4p of the lateral hole 4.

Abstract: Some variations provide a method of making a nanofunctionalized metal powder, comprising: providing metal particles containing metals selected from aluminum, iron, nickel, copper, titanium, magnesium, zinc, silicon, lithium, silver, chromium, manganese, vanadium, bismuth, gallium, or lead; providing nanoparticles selected from zirconium, tantalum, niobium, or titanium; disposing the nanoparticles onto surfaces of the metal particles, in the presence of mixing media, thereby generating nanofunctionalized metal particles; and isolating and recovering the nanofunctionalized metal particles as a nanofunctionalized metal powder. Some variations provide a composition comprising a nanofunctionalized metal powder, the composition comprising metal particles and nanoparticles containing one or more elements selected from the group consisting of zirconium, tantalum, niobium, titanium, and oxides, nitrides, hydrides, carbides, or borides thereof, or combinations of the foregoing.

Abstract: The present invention relates to a technical field of functional materials, and in particular to a high-strength dissolvable aluminum alloy and a preparation method therefor. In order to solve the problem of a relatively low strength of the existing dissolvable materials, a high-strength dissolvable aluminum alloy material and a preparation method therefor are provided. The raw materials of the high-strength dissolvable aluminum alloy comprise: aluminum, a functional metal, and a metal oxide; the addition amounts of the aluminum and the functional metals are: 60-99 wt. % of aluminum, 0.9-39.9 wt. % of the functional metals; and the addition amount of the metal oxide is: 0.01-11 wt. %. The high-strength dissolvable aluminum alloy can not only meet the usage requirements of high mechanical strength in service, but can also rapidly degrade after the service is completed. In addition, the preparation method of this material is simple, low in cost, and easy for large-scale production.

Abstract: Provided is a method for preparing a reduced titanium powder by a multistage deep reduction, including the following steps of: uniformly mixing a dried titanium dioxide powder with a magnesium powder to obtain a mixture, adding the mixture in a self-propagating reaction furnace, triggering a self-propagating reaction, obtaining an intermediate product of which low-valence titanium oxides TixO are dispersed in an MgO matrix, leaching the intermediate product with a hydrochloric acid as a leaching solution, performing filtering, washing and vacuum drying to obtain a low-valence titanium oxide TixO precursor, uniformly mixing the low-valence titanium oxide TixO precursor with a calcium powder, performing a pressing to obtain semi-finished products, placing the semi-finished products in a vacuum reduction furnace for a second-time deep reduction, and leaching a deep reduction product with a hydrochloric acid as a leaching solution so as to obtain the reduced titanium powder.

Abstract: Provided is an aluminum alloy substrate for a magnetic disk that includes an aluminum alloy containing 0.4 to 3.0 mass % (hereinafter abbreviated as “%”) of Fe, 0.005% to 1.000% of Cu, and 0.005% to 1.000% of Zn, with a balance of Al and unavoidable impurities. This substrate has a ratio A/B of 0.70 or more, where A indicates a distribution density of Al—Fe intermetallic compound particles having maximum diameters of 10 ?m or more and less than 16 ?m, and B indicates a distribution density of Al—Fe intermetallic compound particles having maximum diameters of 10 ?m or more. The distribution density of Al—Fe intermetallic compound particles having maximum diameters of 40 ?m or more is at most one per square millimeter. Also provided are a method of fabricating this aluminum alloy substrate for a magnetic disk and a magnetic disk composed of the aluminum alloy substrate for a magnetic disk.

Abstract: The present disclosure relates to a powder of an austenitic alloy and a HIP:ed object manufactured thereof and a process for the manufacturing the HIP:ed object and its use in corrosive environments.

Abstract: The present disclosure discloses a method for heat treating an iron-carbon alloy. The method comprises acts of heating the iron-carbon alloy to a first pre-determined temperature at a pre-determined heating rate, holding the iron-carbon alloy at the first pre-determined temperature for a pre-set period of time. The method further comprises acts of cooling the iron-carbon alloy to a second pre-determined temperature at a pre-determined cooling rate and inducing magnetic field on the iron-carbon alloy selectively during at least one of heating and cooling of the iron-carbon alloy. The induction of magnetic field on the iron-carbon alloy results in microstructural changes to improve formation of pearlitic structure in the iron-carbon alloy.

Abstract: The invention relates to a method for coding metal powder. Said method comprises the following steps: providing a melt, forming a melt stream, spraying the melt stream by means of a spraying fluid, and forming metal powder particles from the melt stream. The method is characterized in that, during the spraying of the melt and/or the spraying fluid, a coding component or a coding gas is added in such a way that the use of the coding component in the metal powder can be detected, wherein the gaseous coding component comprises one or more isotopes of at least one gas and the fraction of the at least one isotope is changed in comparison with the naturally occurring fraction of said isotope in the gas and/or wherein the gaseous coding component contains gaseous alloying elements.

Abstract: A powder metallurgy moulding composition intended for manufacturing decorative or covering articles in sintered massive cermet, including an inorganic powder to form the cermet and an organic binder. The inorganic powder includes by weight of 35% to 95% of at least one ceramic phase based on ceramic selected from the group consisting of TiC, TiCN, TiN and mixtures thereof, and from 5% to 65% of a metallic phase, the metallic phase consisting by weight of at least 40% of iron, from 15% to 45% of chromium, from 0.1% to 25% of molybdenum, from 0.1% to 10% of silicon, from 0 to 10% of boron, and from 0 to 10% of niobium, the respective amounts of the elements of the metallic phase being such that their sum is equal to 100 wt % of the metallic phase.

Abstract: An electrode structure, which can be used as a biosensor, is provided that has non-random topography located on one surface of an electrode base substrate. The non-random topography of the electrode structure and the electrode base substrate of the electrode structure are of unitary construction and unitary composition and thus there is no interface is located between these elements of the electrode structure.

Abstract: Systems and methods for continuously casting Al—Mg alloy sheet or plate product having a high amount of magnesium are disclosed. The Al—Mg products have 4 or 6 to 8 or 10 wt. % Mg and are resistant to both stress corrosion cracking and intergranular corrosion.

Abstract: An aluminum alloy fin material for a heat exchanger in the present invention comprises an aluminum alloy having a composition containing Mn: 1.2 to 2.0%, Cu: 0.05 to 0.20%, Si: 0.5 to 1.30%, Fe: 0.05 to 0.5%, and Zn: 1.0 to 3.0% by mass and a remainder comprising Al and an unavoidable impurity, further containing one or two or more of Ti: 0.01 to 0.20%, Cr: 0.01 to 0.20% and Mg: 0.01 to 0.20% by mass as desired, and, after heating in brazing, has a tensile strength of 140 MPa or more, a proof stress of 50 MPa or more, an electrical conductivity of 42% IACS or more, an average grain diameter of 150 ?m or more and less than 700 ?m, and a potential of ?800 mV or more and ?720 mV or less.

Abstract: Wire products, such as round and flat wire, strands, cables, and tubing, are made from a shape memory material in which inherent defects within the material are isolated from the bulk material phase of the material within one or more stabilized material phases, such that the wire product demonstrates improved fatigue resistance. In one application, a method of mechanical conditioning in accordance with the present disclosure isolates inherent defects in nickel-titanium or NiTi materials in fields of a secondary material phase that are resistant to crack initiation and/or propagation, such as a martensite phase, while the remainder of the surrounding defect-free material remains in a primary or parent material phase, such as an austenite phase, whereby the overall superelastic nature of the material is preserved.