144results about How to "Promote interdiffusion" patented technology

Embodiments of three-dimensional (3D) memory devices and methods for forming the 3D memory devices are disclosed. In an example, a NAND memory device includes a substrate, a plurality of NAND strings on the substrate, one or more peripheral devices above the NAND strings, a single crystalline silicon layer above the peripheral devices, and one or more interconnect layers between the peripheral devices and the NAND strings. In some embodiments, the NAND memory device includes a bonding interface at which an array interconnect layer contacts a peripheral interconnect layer.

The invention relates to a method for preparing a nano porous copper thin film material by magnetron sputtering. The method takes a commercial copper foil as a base body material and takes high-purity copper target and aluminum target as sputtering materials; magnetron sputtering equipment is a preparation tool; a nano porous copper thin film is obtained by sputtering a copper-aluminum thin film through a glow discharge principle, and dealloying and corroding to remove an active component aluminum after annealing and alloying. The method provided by the invention is a two-step reaction method, the problems in the prior art that steps for carrying out smelting, ball milling and melt spinning on alloy auxiliary materials are complicated and consumed time is long are solved, and steps of a preparation process are simplified; a nano porous structure of nano porous copper is obtained and the size of the thin film is controllable; the obtained structure is better than a nano porous copper powder sample obtained by a traditional method; furthermore, an application range of the nano porous copper is enlarged and the nano porous copper has a commercial prospect.

The invention relates to a homogeneous three-phase reactor for jet aeration. A three-phase homogenizing plate for jet aeration is arranged at the bottom of a reactor shell or inside a slurry inlet channel; a micro-pore penetrating through the three-phase homogenizing plate for jet aeration is formed in the three-phase homogenizing plate for jet aeration, so that a three-phase mixture of an oil product, hydrogen and a catalyst flows through the micro-pore, and air bubbles of the gas and liquid drops of the liquid become fine and even. Thus, diffusion and full contact of gas, liquid and solid three-phase substances are facilitated by fine and homogenized air bubbles and liquid drops. The homogeneous three-phase reactor for jet aeration disclosed by the invention can achieve full and even mixing of the oil product, the hydrogen and the catalyst, thus a full touch opportunity is created for reaction of the oil product and the hydrogen on the surface of the catalyst, so that reaction is complete and the reaction efficiency is high.

The invention provides a method for surface modification and high strength connection of magnesium alloy and aluminum alloy. The method is as follows: carrying out surface modification on magnesium alloy and aluminum alloy by using the technology of magnetron sputtering and depositing a silver thin layer with micron thickness as a barrier layer and an active layer; and realizing high strength connection of the magnesium alloy and the aluminum alloy at a low temperature by using the technique of vacuum diffusion welding. The invention has the following advantages: coating modification enables surface oxidation resistance of the easily-oxidizable aluminum alloy and magnesium alloy to be improved; diffusion connection of the magnesium alloy and the aluminum alloy at a low temperature is realized for the first time by using the highly active silver thin layer; the silver thin layer changes the phase composition and microstructure of a magnesium/aluminum connection interface and prevents formation of a high-hardness brittle magnesium-aluminum intermetallic compound on the interface, and high strength Mg-Ag and Ag-Al intermetallic transition layers are formed and have a shear strength of 20 to 30 MPa, increased by nearly 4 times compared with a shear strength obtained through direct welding of magnesium aluminum. The method provided in the invention has the advantages of a simple process and high control precision; an obtained connecting piece has small deformation and residual stress.

The invention relates to a roll-bonding process for semisolid copper-lead bearing alloys/steel bimetals. The weight content percentage of the lead in the copper-lead bearing alloy is 10.0 to 30.0%. In order to refine the crystalline grain of the lead and improve the mechanical property of the alloy, sulfur, tin, nickel, manganese, rare earth and other the third alloy elements can be added in the copper-lead alloy. The process comprises four steps: pretreatment of steel plates, preparation of semisolid sizing agent, roll bounding and water cooling. The detailed process comprises the following steps: performing mechanical agitation to the melted copper-lead bearing alloys at 930 to 1050 DEG C to obtain the semisolid sizing agent; pouring the semisolid sizing agent on the pretreated steel plates; synchronously feeding the semisolid copper-lead bearing alloys and solid steel plates in to a mill for rolling; spraying water for cooling to obtain the bimetallic composite plate. The invention effectively overcomes the defect of lead segregation in the production of the copper-lead bearing alloys in the prior art, therefore, metallographic structure with fine lead particle and even distribution is obtained. According to mechanical test results, the interfacial shear strength of the copper-lead bearing alloys/steel bimetallic slabs prepared using the process is more than 60Mpa, increased by about 10Mpa.

Provided are a hard coating composition and a hardened membrane containing the same. The hard coating composition comprises, by weight, 30 to 80 parts of hydroxyl-containing acrylate monomers, 1 to 10 parts of an photoinitiator, 20 to 70 parts of a solvent and 0.1 part to 5 parts of a reactive organosilicon surface wetting auxiliary agent, wherein, the hydroxyl-containing acrylate monomers are a mixture of hydroxyl-containing multi-functional acrylate monomers and hydroxyl-containing low functional acrylate monomers mixed according to a weight ratio of 2:8 to 8:2. The composition provided in the invention has excellent adhesion to a PET substrate surface which is never treated and a PET substrate surface which has corona or a failure coating bottom; hardness of the hardened layer of the obtained hardened membrane is greater than 1H, and therefore, the hardened membrane can be used as a hardened membrane of an indium tin oxide (ITO) touch screen, an in-mold label (IML), or the like.

The invention discloses a manufacturing method of a high-density pure-rhenium test tube. The manufacturing method comprises the following steps: 1) preparing raw materials, that is, carrying out radio-frequency plasma spheroidization on high-purity rhenium powder; preparing high-purity spherical rhenium powder or high-purity sphere-like rhenium powder of which the spheroidization rate is not less than 80% and the average particle size is 5 to 35 mum; 2) carrying out aging treatment on the rhenium powder, that is, carrying out the aging treatment on the rhenium powder subjected to the spheroidization in a protective atmosphere II; 3) forming, that is, putting the rhenium powder which is subjected to the aging treatment into an elastic die sleeve; using cold isostatic pressing techniques to carry out pressing to form and manufacture a test tube green compact; 4) sintering, that is, placing the formed test tube green compact in a high-temperature sintering furnace, and sintering in a protective atmosphere IV; 5) machining to manufacture a test tube finished product. Finally, the high-density pure-rhenium test tube of which the density is greater than 20.2g/cm<3> (the theoretical density is 96%) and the ratio of the length to the outer diameter is greater than 15 is manufactured.

The invention relates to a preparation method of a Sn-base composite solder sheet based on a porous Ni/Cu alloy. The preparation method comprises the steps that first of all, a layer of Cu is preparedon the surface of porous Ni metal, and then high-temperature sintering is carried out, so that mutual diffusion between Ni and Cu is facilitated, and bonding of Ni and Cu is further tight; and then the porous Ni/Cu alloy is immersed into the molten Sn-base solder, and finally is rolled into a foil. In the porous Ni/Cu alloy subjected to high-temperature sintering treatment, the bonding strength of Ni and Cu is higher and the oxidation resistance is better through the mutual diffusion between Ni and Cu, and the relatively high strength, good plasticity, high corrosion resistance and high ductility are shown. Along with change of sintering parameters and electroplating parameters, concentration distribution gradients of Ni and Cu in the porous Ni/Cu alloy are different, reaction between theporous Ni/Cu alloy and the Sn-base solder is rapider in the brazing process, and the soldering reliability is high.

The invention relates to a synthesizing method of a nano-grade lithium ion battery composite positive electrode material LiMnPO4/C. According to the invention, a lithium source, a phosphorous source, a manganese source and an organic carbon source are well mixed in a solvent medium; the mixture is processed for 2-7h in a high-energy ball mill, and a uniformly dispersed precursor slurry is obtained with the activation effect of mechanical forces; the precursor slurry is subjected to ultrasonic dispersion in a high-boiling-point polyol solvent, and is subjected to a reflux reaction; an obtained product is filtered and washed; and the product is subjected to a heat treatment for 1-10h under inert atmosphere protection and under a temperature of 600-800 DEG C, such that the nano-grade lithium manganese phosphate/carbon (LiMnPO4/C) positive electrode material is obtained. According to the material provided by the invention, primary particles are well distributed nano-particles, and a conductive carbon layer is formed in-situ on the surfaces of the LiMnPO4/C particles. The method provided by the invention is simple and highly efficient. With the method, no pollutant such as ammonia gas or wastewater is produced during the entire process. Therefore, a development requirement of green chemistry is satisfied.

The invention relates to a europium and samarium-doped lithium magnesium phosphate photostimulated luminescent material and a preparation method thereof. The chemical formula of the material is LiMgPO4: Eu, Sm, B, and the specific preparation method comprises the following steps of: mixing and grinding raw materials, namely lithium hydroxide, magnesium nitrate, ammonium dihydrogen phosphate, boric oxide, europium oxide and samarium oxide, loading into a porcelain crucible made of an aluminum oxide material, placing into a high-temperature sintering furnace for performing sectional constant-temperature sintering, and further cooling the aluminum oxide crucible to room temperature to obtain the europium and samarium-doped lithium magnesium phosphate LiMgPO4: Eu, Sm, B photostimulated luminescent material. The material is of an olivine type structure, the space group is Pnma, the lattice constants are as follows: a=10.147., b=5.909. and c=4.692., and the doping of europium and samarium does not change the basic structure of the LiMgPO4 material; and the thermoluminescence performance of the material is greatly upgraded, the sensitivity and the stability in storage of radiation dose information are effectively improved, the addition of the samarium oxide upgrades the luminescence performance of rare earth europium ions, and the material has low environmental pollution and low cost and can be applied to environments, medicines and offline and real-time online measurement of human body radiation doses.

The invention relates to a hot pressing sintering particle reinforcing zinc-based composite material and a preparation method thereof, and belongs to the technical field of composite material preparation. The method includes the steps of preparing Zn powder, Al power, Cu power and TiB2 power as raw materials according to the mass ratio of 50-90 to 15-40 to 1-3 to 1-20, conducting high energy ball-milling and prepressing, and then obtaining the hot pressing sintering particle reinforcing zinc-based composite material through a segmented sintering method. The prepared components are reasonable in design, the preparation process is simple, and the zinc-based composite material which is high in interface combination strength and low in porosity and defect rate is obtained through the coordinative effects of all the components and all parameters.

The invention provides an ultrasonic solidification-friction stir composite added material manufacturing device and an application method. The ultrasonic solidification-friction stir composite added material manufacturing device comprises a shell, a machining mechanism, a metal foil conveying mechanism, a driving mechanism, a cutting mechanism, a movable steering mechanism, an extrusion mechanism,an adjusting mechanism and locking universal wheels; the machining mechanism is fixedly connected into the shell; and the machining mechanism comprises a numerical control machining center, a controlpanel, a machining cavity, a substrate, a first electric slide rod, a first electric slide sleeve, a mounting plate, a connecting plate, a machining head, a transducer, an amplitude change rod, an insulation sleeve, a first cylinder, a first piston rod and a friction stir head. The ultrasonic solidification-friction stir composite added material manufacturing device can prepare high-performance metal samples; the mechanical performances of the samples are higher than forgings by 20-50%; and the device is low in size limiting, can machine large-size complex-structured parts, can from more thantwo metal materials according to working conditions and typical performance requirements of parts, and realizes preparation of heterogeneous/gradient function materials.

The invention discloses an electrochemically assisted powder metallurgy method for preparing porous titanium or titanium alloy, and belongs to the field of porous biomedical titanium or titanium alloy. The method comprises the steps that titanium powder or titanium alloy powder are completely mixed and pressed into a titanium or titanium alloy porous metal precursor; then a fine molybdenum wire isconnected to a molybdenum rod, thus, a cathode is prepared, and a graphite rod is connected with a molybdenum rod, so that an anode is prepared; after molten salt raw materials are heated to a melting temperature, molten salt is formed, the cathode and the anode are inserted into the molten salt, a two-electrode system is formed, constant voltage of 2.0-3.0 V is applied into the two electrodes, electrochemically assisted sintering is conducted for 10-15 h, after electrolysis is completed, the cathode is taken out, cooled, washed with deionized water, subjected to vacuum drying and polished, and the porous titanium or titanium alloy is obtained. Through the method, the operation temperature can be lowered, the product performance is improved, and the method is environmentally friendly andeasy to operate.

The invention discloses a preparation method of a fluorine-containing resin mixture film and a copper-clad plate. The preparation method comprises the following steps: preparing a uniform dispersion solution of a fluorine-containing resin mixture; and uniformly dispersing the fluorine-containing resin mixture solution on PTFE (polytetrafluoroethylene), and performing baking and drying to obtain the fluorine-containing resin mixture film of PTFE; then preparing the copper-clad plate by using the fluorine-containing resin mixture film of the PTFE; the method of invention aims to utilize PTFE with poorer performance, a unique film preparation technology is adopted, the problems of poor thermal stability, poor mechanical properties, poor cohesiveness, poor strength and the like of the copper-clad plate caused by the problems of PTFE are solved, the finally obtained copper-clad plate has low hygroscopicity, stable dielectric constant and low transmission loss, the peel strength and the adhesiveness of the product are both at a high level, meanwhile, resource utilization is achieved, and waste is avoided.