61 results about "Self-diffusion" patented technology

To provide a highly conductive Cu alloy which is advantageous in that an alloying element added to Cu is first reacted with oxygen contained in a gas atmosphere or solid in contact with the Cu member to form an oxide film which can prevent oxidation of Cu. The copper alloy comprises copper (Cu) containing an inevitable impurity, and an element added to the copper, wherein the added element is capable of being dissolved in the copper in an amount of 0.1 to 20 at. %, wherein the added element has an oxide formation free energy smaller than that of Cu and has a diffusion coefficient in Cu larger than the self-diffusion coefficient of Cu.

Proposed is a Cu—Mn alloy sputtering target, wherein the Mn content is 0.05 to 20 wt %, the total amount of Be, B, Mg, Al, Si, Ca, Ba, La, and Ce is 500 wtppm or less, and the remainder is Cu and unavoidable impurities. Specifically, provided are a copper alloy wiring for semiconductor application, a sputtering target for forming this wiring, and a manufacturing method of a copper alloy wiring for semiconductor application. The copper alloy wiring itself for semiconductor application is equipped with a self-diffusion suppression function for effectively preventing the contamination around the wiring caused by the diffusion of active Cu, improving electromigration (EM) resistance, corrosion resistance and the like, enabling and facilitating the arbitrary formation of a barrier layer, and simplifying the deposition process of the copper alloy wiring for semiconductor application.

The invention discloses a tail gas buffer dilution treatment method for safe emission of hydrogen from a fuel cell vehicle and a device thereof. The device comprises a hydrogen buffer, a flow control valve, a draining valve, a flame arrester, an earth terminal, an emergency hydrogen exhaust valve, a hydrogen sensor and a control module. The pulse hydrogen emitted from an anode side of the fuel cell is firstly buffered by the buffer, and a small stream of air introduced from an air path emitted from the cathode side dilutes and sweeps the hydrogen in the buffer; then the diluted hydrogen emitted from the buffer and the gas from a main air pipeline are mixed, thus the volume concentration of the tail hydrogen emitted from the fuel cell vehicle is controlled below the explosion limit concentration 4%, and the purified water discharged from a condenser can be recycled. The tail gas buffer dilution treatment device utilizes the techniques of self-diffusion, multi-tube pass buffer, air mixing and exchange, expansion, condensation and the like to buffer and dilute the hydrogen-containing tail gas emitted from the fuel cell vehicle and separate the water and gas in the hydrogen-containing tail gas, thus eliminating the possible fire hazard and ensuring the safe running of the fuel cell vehicle.

Provided is a high-purity copper-manganese-alloy sputtering target comprising 0.05 to 20 wt. % of Mn, 2 wt ppm or less of C, and the remainder being Cu and inevitable impurities, wherein in formation of a film on a wafer by sputtering the target, the number of particles composed of C, at least one element selected from Mn, Si, and Mg, or a compound composed of C and at least one element selected from Mn, Si, and Mg and having a diameter of 0.20 μm or more is 30 or less on average. Particle generation during sputtering can be effectively suppressed by thus adding an appropriate amount of Mn element to copper and controlling the amount of carbon. In particular, a high-purity copper-manganese-alloy sputtering target that is useful for forming semiconductor copper alloy line having a self-diffusion suppression function is provided.

A composite optical film has the functions of brightness enhancement, self-diffusion and defect blocking. The film comprises: a structured substrate including a structured light incidence surface and a light emitting surface opposite the structured light incidence surface, wherein the structured light incidence surface includes longitudinal prism structures or longitudinal lens structures transversely arranged in rows; a support base plate adjacent to the light emitting surface of the structured substrate, the support base plate having a light incidence surface on one side and a light emitting surface on another side opposite the light incidence surface, wherein at least one of the light incidence surface and the light emitting surface has a plurality of buried particles, and at least one portions of the buried particles are protruded on the light emitting surface of the support base plate.

The invention belongs to the technical field of high-strength steel machining engineering, and particularly relates to a determination method of thermal-deformation microstructure evolution mechanismsand thermal machining performance of C-Mn-Al high-strength steel. According to the method, firstly, a high-temperature compression test is carried out on the novel C-Mn-Al high-strength steel, and true stress-true strain curve data of the steel are obtained; then a rheology stress prediction model of the steel is established, model selection is based on creep theory, a class of constitutive models which are of relationships of Young's modulus and a self-diffusion coefficient of austenite and temperature and have physics bases are considered, and the established constitutive model can accurately predict rheology stress of the steel; a thermal-deformation machining graph of the steel is established, and microstructures are combined to determine the microstructure evolution mechanisms of different regions in the machining graph. The constitutive model of thermal deformation and the machining graph are combined, the thermal-deformation rheology stress and thermal-deformation power dissipation efficiency under arbitrary deformation conditions are analyzed, thus the corresponding microstructure evolution mechanisms and thermal machining performance information are obtained, and resultshave great significance for thermal machining process control of the high-strength steel.

The invention relates to a preparation method of self-dispersing salt-resistance type acrylic high-absorbent resin; the method is characterized in that the method comprises the following steps: (1) refined acrylic acid and metacrylic acid ester or acrylic ester is added into a reaction kettle, and organic mixed solvent, compound cross linkers, and evocating agents are added; (2) stirring and polymerization are carried out under the protection of nitrogen, and the reaction temperature is controlled to be 45-50 DEG. C, and the polymerization reaction is carried out until the reaction mixture changes into a viscous suspending liquid (the required time is a plurality of hours); (3) the polymer is displaced in a one-port flask, and then the organic mixed solvent is removed; and (4) vacuum drying and grinding are carried out for obtaining the self-dispersing salt-resistance type acrylic high-absorbent resin which is thin white powder. The method overcomes the disadvantages in the prior art, leads the polymerized products to have uniform molecular weight, rapid dispersing speed and good salt resistance; in addition, the transparency is high; and the method has simple process, is economic and reasonable, and is suitable for industrial production.

The invention relates to a self-diffusion gradient functional compound cutting tool material and a preparation method thereof. The preparation method comprises the following steps: grinding ultrafine Ti(C5N5) powder, ultrafine WC powder, nanometer Ni powder and nanometer Mo powder into matrix compound powder; grinding TiB2-TiC eutectic powder, Al2O3 powder, ultrafine VC powder and nanometer Ni powder into surface compound powder; weighting little surface compound powder, pouring into a graphite jig and compacting; weighting the matrix compound powder, putting onto the compacted surface compound powder, and then compacting; weighting a little surface compound powder, putting onto the compacted matrix compound powder, and then compacting; putting into a vacuum high-temperature sintering furnace, directly heating and slowly pressurizing and sintering. According to the invention, the self-diffusion gradient functional compound cutting tool material with excellent compatibility and interface bonding of interlayer components is prepared through diffusion and sintering. The self-diffusion gradient functional compound cutting tool material has the characteristics of hard and wear-resisting surface, tough subsurface stratum, surface layer peeling prevention, strong whole body and breaking resistance.

The invention discloses a preparation method of a bonding alloy wire. The preparation method comprises the following steps that: (1) 99.995% silver is purchased, and the 99.995% silver is made into a silver sheet; (2) intermediate alloy is made; (3) vertical melting is performed; (4) wire drawing is performed; (5) intermediate annealing is performed; (6) wire drawing is performed again; (7) annealing is performed; (8) winding is performed; and (9) vacuum packaging is performed. According to the preparation method of the invention, when wire drawing is performed to obtain a wire rod of 70 to 100 microns, and an intermediate annealing process is additionally adopted to eliminate stress, so that wire drawing is smoother, and wire fracture can be better avoided; after a finished wire is annealed, surface treatment is performed on the finished wire, and therefore, a bonding effect of self-diffusion of the bonding alloy wire can be effectively avoided, and the yield of the finished product can be improved; surface residues of the alloy wire can be effectively reduced, and the quality of the product is improved. According to the preparation method of the invention, an ultrasonic cleaning system is utilized to effectively clean lubricating fluid on the surface of the alloy wire, and therefore, surface residues on the surface of the alloy wire can be effectively reduced, and the quality of the product can be improved.

The invention discloses a magnesium-base composite refractory raw material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: preparing light-burned magnesite from 83-86% of low-grade magnesite or tailings, adding 1-3% of additive, 1-2% of metal aluminum powder, 3-5% of metal silicon powder, 3-5% of alpha-Al2O3 fine powder and 3-4% of composite binder, co-grinding, mixing, compression-moulding, baking and carrying out high-temperature nitridation firing to obtain the magnesium-base composite refractory raw material. Compared with the common high-purity magnesite refractory raw material, the magnesium-base composite refractory raw material has favorable thermal shock resistance, favorable erosion resistance and other high-temperature service properties. The composite additive is added on the basis of the existing impurity components of the low-grade magnesite and tailings, and a self-diffusion high-temperature nitrizing treatment process is utilized to change the matrix composition and liquid-phase distribution, thereby enhancing the comprehensive utilization ratio of the low-grade magnesite and tailings.

The invention discloses a flocculating and dehydrating method for treating waste slurry in a process for preparing polyaluminum chloride by an aluminium ash method. The method comprises the following steps: firstly Zeta potential of the waste slurry in the process for preparing polyaluminum chloride is adjusted by using an anionic surfactant sodium alkyl sulfate; a polyaluminum chloride solution is separated, rest waste slurry is precipitated, the solid content of the waste slurry is adjusted, cation-type polyacrylamide is added, cation-type polyacrylamide is dispersed based on self-diffusion and stirring, and flocculation and dehydration are carried out; finally, after flocculation and dehydration, the waste slurry is filtered, in order to realize solid-liquid separation. The solid content of the waste slurry is improved from 60.0%-62.5% from 50.0-55.0%, slurry with high acid solution content is converted into loose blocks, the treated waste slurry can be directly transported, in order to facilitate disposal and recycling. In addition, the volume of the waste slurry is reduced by about 21% by the flocculating and dehydrating method, and 20-30% of the volume of the polyaluminum chloride solution is recycled. The Zeta potential of the waste slurry is adjusted for realizing flocculating and dehydrating effects, and the method has theoretical significance and practical value in industrial production process.

A copper-titanium alloy sputtering target comprising 3 at % or more and less than 15 at % of Ti and a remainder made up of Cu and unavoidable impurities, wherein a variation (standard deviation) in hardness is within 5.0 and a variation (standard deviation) in electric resistance is within 1.0 in an in-plane direction of the target. Provided are: a sputtering target for forming a copper-titanium alloy wiring line for semiconductors capable of causing the copper alloy wiring line for semiconductors to be equipped with a self-diffusion suppressive function, effectively preventing contamination around the wiring line caused by diffusion of active Cu, improving electromigration (EM) resistance, corrosion resistance and the like, enabling the arbitrary formation of a barrier layer in a simple manner, and uniformizing film properties; a copper-titanium alloy wiring line for semiconductors; and a semiconductor element and a device each equipped with the semiconductor wiring line.

The invention relates to the elastic surface acoustic wave device and production method thereof and mobile communication equipment using it. An electrode material for a elastic surface acoustic wave device comprising laminates in at least two stages, each laminate being formed by laminating a second metal layer (5) on a first metal layer (4), wherein the first metal layer (4) uses a metal having a diffusion coefficient to Al which is smaller than a self-diffusion coefficient of Al, and the second metal layer (5) uses a ternary or higher Al alloy in which at least two kinds of metals, at least one kind of metal solid-dissolved to Al at room temperature and at least one kind of metal which segregates in an Al grain boundary or forms an intermetallic compound with Al at room temperature are added, whereby a surface acoustic wave device excellent in power resistance, capable of using a conventional pattern forming technique, being thermally stable and preventing an insertion loss increase can be provided.

The invention discloses a method for preparing a Si3N4 gradient material through self-diffusion. The method comprises steps as follows: Si3N4 and MO2 powder are taken as raw materials, wherein M is Ti, Zr or Hf, MgO-Re2O3 is taken as a sintering aid, the components are mixed and dried, and mixed powder is obtained; after the mixed powder is subjected to isostatic cool pressing, a sample is embedded in the powder, the mixture is put in a sintering furnace, and the Si3N4 gradient material is obtained finally. A gradient MN layer is formed on the surface of the Si3N4 material prepared with the method, and MN as a high-hardness and wear-resistant conductive phase can allow direct coating treatment on the surface of Si3N4 ceramic while improving surface hardness and wear resistance of the Si3N4ceramic; relative density is higher than 95%, surface hardness is 18-25 GPa, fracture toughness is 10-14 MPa.m<1/2>, bending strength is 1000-1500 Mpa, and gradient layer thickness is 10-200 mu m.

Reactive flakes and their use are provided as localized heat sources for ignition, connection and propulsion. An improved reactive sheet (14) preferably has a multi-layer sheet structure consisting of alternating layers (16, 18) selected from materials that can react with each other in exothermic and self-diffusion reactions. Upon reaction, these sheets provide high localized heat that can be used, for example, to join layers, or to join loose materials directly. This sheet heat source can produce rapid connections at room temperature in various environments (eg, air, vacuum, water, etc.). If a joining material is used, the sheet reaction will provide enough heat to melt the joining material. If no connecting material is used, the sheet reaction provides heat directly to at least two loose materials, melting a portion of each, forming a strong bond upon cooling. In addition, the sheet (14) can also be designed with openings that allow joining (or loose) material to pass through the sheet to increase join strength.

The invention relates to a method and a device for preparing strontium carbonate crystals through self-diffusion at room temperature. According to the method, with strontium dichloride hexahydrate andammonium hydrogen carbonate as reactants and glycine as a biomimetic control agent, granular strontium carbonate crystals are prepared; the method comprises the following specific steps: in a reaction device, adding a first batch of the strontium dichloride hexahydrate and the ammonium hydrogen carbonate, then adding 0.020% of a glycine solution, reacting for 24h by standing at room temperature,supplementing a second batch of the reactants and a third batch of the reactants, respectively continuing reacting for 24h by standing, filtering a reaction product, washing for three times by using distilled water, and drying for 1h at 105 DEG C to obtain the granular strontium carbonate crystals with the grain diameter of 110-440nm, wherein the product purity is higher than or equal to 99% and the yield is 96-98%. The reaction device consists of a reactor 1 (5), a reactor 2 (9) and a reactor 3 (13). The method and the device have the advantages of high preparation efficiency, simple and convenient operation, high technological stability, low energy consumption, low production cost and the like.