58results about How to "Co-deposition" patented technology

The invention provides a preparation method of a graphene-copper-amorphous composite coating. The preparation method comprises the following steps that graphene-copper composite powder is prepared; graphene-copper-amorphous composite powder is prepared; the graphene-copper-amorphous composite coating is prepared on the surface of a workpiece through the hot spraying technology by taking the composite powder as composite feeding powder for spraying; according to the hot spraying process, the surface of a workpiece substrate is subjected to cleaning pretreatment firstly, then sand blasting is conducted, spraying is conducted through the hot spraying technology, and a bonding coating which is 80-120 microns thick is obtained; and finally, spraying is conducted on the surface of the sample treated in the last step through the hot spraying technology, and the graphene-copper-amorphous composite coating is obtained. The grain size of the graphene-copper composite powder is 10-100 microns. The friction coefficient of the composite coating is reduced by 37.5% compared with that of a single amorphous coating. The abrasion resistance of the composite coating is improved, and the abrasion weight loss of the composite coating can be reduced by 57.8% compared with that of the single amorphous coating.

The invention relates to chemical plating on a surface of a metal material and particularly to a Ni-Cu-P-Ce alloy plating layer used for chemical plating on a surface of a low-carbon steel base material and a preparation process of the Ni-Cu-P-Ce alloy plating layer. The Ni-Cu-P-Ce alloy plating layer adopts a plating liquid composed of 35-40 g/L of nickel sulfate, 0.2-0.4 g/L of copper sulfate, 25-30 g/L of sodium hypophosphite, 8-10 g/L of sodium acetate, 25-30 g/L of trisodium citrate, 22-28 ml/L of lactic acid, 8-10 g/L of butanedioic acid, 0.2-0.4 g/L of cerium nitrate, 8 mg/L of potassium iodide, 1.5 mg/L of thiourea, 0.01 g/L of glycine and 0.2 g/L of ammonium bifluoride. For the adoption of ultrasonic chemical plating, a plating layer material formed by codeposition of Ce, Cu and Ni is obtained; and the material has increased compactness, is a microlithic texture, and is high in hardness and strong in corrosion resistance.

The invention relates to a preparing method of a diamond-like carbon composite film with gold nano particles. Methanol solution with gold nano particles is selected as deposit liquid; a method of electrochemical deposition is adopted; graphite is used as anode, and a conductive substrate is used as cathode; the diamond-like carbon composite film with gold nano particles is received deposited and obtained on the cathode through direct current high voltage and stirring effect. The invention has the characteristics that the equipment is simple, the temperature of deposition is low, the film is formed evenly, common deposition of nano particles and DLC film is fulfilled, and the nano particles can be evenly scattered in carbon substrate of the film.

The invention discloses a preparation method of a copper-zinc-iron ternary alloy chemical plating layer on the surface of aramid fiber. The preparation method comprises the following steps: carrying out surface modification on aramid fiber; carrying out low-concentration colloid palladium treatment; and carrying out a copper-zinc-iron ternary alloy chemical plating process. The preparation method has the beneficial effects that an environment-friendly glyoxylic acid chemical plating process is used to realize co-deposition of a copper-zinc-iron ternary alloy; the plating layer is composed of following components in percentage by mass: 85%-90.5% of copper, 1.0%-3.0% of iron, 0.5%-1.5% of zinc and the balance of carbon and oxygen; through detection, the surface resistance of the plating layer keeps below 50m(omega)/sq; an adhesive tape method is used for determining the binding force between the plating layer and fabric fibers and the weight loss ratio is less than 0.1%; the plating layer is bright and a microstructure is uniform; the plating layer can resist atmosphere corrosion and meets the requirements of electric conduction, electromagnetic shielding, static electricity prevention and the like.

The invention discloses a method for electrodepositing a lithium-copper alloy in an ionic liquid system, which relates to a method for electrodepositing the lithium-copper alloy. The method solves the problems that the conventional smelting method for preparing the lithium-copper alloy cannot control the lithium element content easily and has high energy consumption. The method comprises the following: step one, adding LiBF4, Cu(BF4)2 and an additive into BMIMBF4 in turn to prepare an electrolyte; and step two, immerging an anode material and a cathode material into the electrolyte, and adopting a constant current mode and controlling the current density and the electrodepositing time to realize the preparation of the lithium-copper alloy, wherein the two steps are performed in a glove box. The method has the advantages of concise process, simple equipment and low energy consumption; the metal lithium content in the lithium-copper alloy is adjusted and controlled by adjusting components and electrodepositing technological parameters of the electrolyte; the metal lithium content is controllable; and the atomic mass percent content is 7 to 40 percent. Simultaneously, the method realizes co-deposition of lithium and copper which have large electrode potential differences; and the obtained lithium-copper alloy can be used as a cathode material for a lithium ion battery.

The invention discloses an anticorrosion abrasive-resistant material which sequentially comprises a base material, a Ni-P coating, a Ni-Cu-P coating and a Ni-Cu-P-TiN coating from inward to outward. According to the invention, flexible metal Cu and TiN nano particles are added into the Ni-P coating via a prior precipitation mechanism and a co-deposition mechanism, so that the Cu metal and the TiN particles have complementary performance advantages; meanwhile, in order to improve the wettability of the TiN particles and a Ni-P alloy, the TiN particles are subjected to Ni coating modification treatment, and the bonding intensity of the TiN particles and the coating is increased; on the other hand, by the multi-layer structural design of Ni-P/Ni-Cu-P/(Ni-Cu-P-TiN), the problem of poor bonding intensity of the coatings caused by the prior precipitation mechanism of Cu is solved. The method is simple in technology, and equipment is low in price; a subsequent technology is combined, a coating scraper with good corrosion resistance and tribology performance can be prepared, and the service life of the scraper can be multiplied.

The present invention belongs to the field of biological bone material preparing technology. The chemical preparation process of composite hydroxyapatite/collagen layer on the surface of Ni-Ti alloy includes the following steps: polishing, washing and drying the Ni-Ti alloy substrate and acid-alkali treatment; pre-calcifying of the substrate inside Na2HOP4 and Ca(OH)2 solution; and finally setting in simulating body fluid containing collagen to grow the composite hydroxyapatite/collagen layer. The process has the features of simple activating treatment and low acid-alkali treatment temperature. In the simulating body fluid containing collagen, hydroxyapatite and collagen are deposited simultaneously to form the composite hydroxyapatite/collagen layer with homogeneous surface and firm combination to the substrate. The present invention is suitable for implant with complicated shape.

The invention discloses a new method and system for TSV blind hole filling. The new method includes the following steps that firstly, a silicon piece with a TSV blind hole is put into deionized water,vacuum suction pretreatment is conducted, and gas in the TSV blind hole is exhausted; secondly, the silicon piece obtained after pretreatment is integrally connected with an electroplating cathode; thirdly, an additive agent, an inhibiting agent and an accelerating agent are added into an electroplating solution, sufficient mixing is conducted, and a suspension electroplating solution is formed;fourthly, the suspension electroplating solution is added into an electroplating bath, an electroplating anode and an electroplating cathode of an electroplating power source are put into the suspension electroplating solution so that the silicon piece can be subjected to standing in the suspension electroplating solution, and the electroplating solution reaches adsorption balance preliminarily inthe TSV blind hole; fifthly, an inlet and an outlet of a circulation pump communicate with the suspension electroplating solution, the inlet communicates with the position of the electroplating anode, and the outlet communicates with the position of the electroplating cathode; and sixthly, a circulation pump is started, the electroplating power source is started at the same time, electroplating begins, and the flowing speed is provided for the suspension electroplating solution in the electroplating bath through the circulation pump. The filling efficiency can be effectively improved, and thecost is reduced.

A method for preparing L10 type ultrahigh density magnetic record metal thin film belongs to the field of magnetic recording, storing and representation information recording. The existing magnetic recording metal thin film preparation method has the problems of rigorous conditions, high requirement of equipment, high production cost and the like. The invention prepares an alloy thin film mainly containing ferro magnetic metal A (Fe, Co or Ni) and precious metal B (Pt, Pd, Ag or Au) by electrochemical co-deposition method, controls the atom content of A to be 50% and obtains ultrahigh density magnetic recording metal thin film of vertical superlattice structure (L10 type). The thin film prepared by the invention has homotaxial magnetocrystalline anisotropy (K), ultrahigh coercivity, excellent physical and chemical stability, potential application prospect in micro-electronics storage field and ultrahigh density magnetic recording material.

The invention discloses fluorocarbon/palladium/magnesium-niobium pentoxide gas dimming film and a preparation method thereof. The fluorocarbon/palladium/magnesium-niobium pentoxide gas dimming film comprises a magnesium-niobium pentoxide composite film layer, a palladium catalytic layer and a fluorocarbon hydrophobic layer which are arranged sequentially on a substrate. The preparation method includes: growing the magnesium-niobium pentoxide composite film layer on the substrate, growing the palladium catalytic layer in situ on the magnesium-niobium pentoxide composite film layer, and depositing the fluorocarbon hydrophobic layer outside the fluorocarbon hydrophobic layer. Catalytic effect of palladium helps promote reversible conversion of hydrogen gas and hydrogen atoms in the hydrogen absorbing and hydrogen removal stages; niobium pentoxide is added to accelerate diffusion of hydrogen atoms in a magnesium substrate, magnesium hydroxide forms and decomposes faster, and the film can be repeatedly converted between a reflecting state and a transaprent state. The fluorocarbon film can effectively resist corrosion of inner film due to the external environment. The whole reaction process can be implemented at room temperature. The fluorocarbon/palladium/magnesium-niobium pentoxide gas dimming film has good weatherability, short response time, short recovery time and good process simplicity, and has important application prospect in the field of intelligent glass.

The invention relates to a gold-tin eutectic solder (AuSn20) electroplating solution and a preparation method thereof. The solution is characterized in that: novel gold potassium citrate is used for replacing traditional gold potassium cyanide, such that the pollution to the environment is reduced; bivalent tin is complexed by using another complexing agent, such that the stability of tin salt is improved. Every liter of the electroplating solution comprises 1-20g of gold salt, 1-20g of tin salt, 10-50g of a buffering agent, 10-50g of a complexing agent, 0.1-10g of a brightening agent, and 0.1-5g of an anti-oxidant. The electroplating solution provided by the invention is environment-friendly, and has relatively wide range of available current density. The obtained plating coat has good brightness, the gold and tin components are precisely controlled, and the melting point is 278-282 DEG C. The electroplating solution is suitable for welding and packaging of photoelectric devices in fields with relatively high requirements on reliability, such as communication, satellite, remote sensing, radar, automobile, aviation, and the like.

The invention relates to a wave-absorbing material and a preparation method thereof, in particular to a chemical nickel-cobalt-lanthanum ternary alloy plating solution for a carbon nano tube, and a preparation method and a chemical plating method thereof. According to the method, a hydrochloric acid solution of lanthanum oxide is added into a chemical plating solution for the carbon nano tube, and the electrode potentials of rare-earth elements La move positively by adjusting the concentration of all components in the plating solution, so that deposition potentials of the rare-earth elements L are close to those of metal Ni and Co; and therefore, alloy co-deposition is realized. One part of the rare-earth elements L in the chemical plating solution exist in the form of positive ions to exert the function of a reducing agent, so that the reduction of metal ions in an alloy plating layer is accelerated, and the phosphorus content in the plating layer is reduced. The chemical plating method has the advantages that according to a chemical nickel-cobalt-lanthanum ternary alloy plating material prepared by the chemical plating method, the lanthanum atom content in the alloy plating layer can reach 4.16 percent.

The invention discloses a composite electrolyte for preparing a corrosion-resistant surface of a petroleum pipeline and a preparation method of the corrosion-resistant layer of the petroleum pipelinethrough ultrasonic-assisted electrodeposition, and belongs to the technical field of electrolysis or electrophoresis processes. The electrolyte per liter is prepared from solute raw material components of 150-200 g of nickel sulfate, 50-80 g of nickel chloride, 30-60 g of sodium hydrogen phosphate, 0.1-0.2 g of sodium dodecyl sulfate, 6 g of nano silicon carbide, 10-30 g of sodium sulfate and 30-50 g of citric acid, and the solvent is deionized water. In an electrodeposition process, the nickel and phosphorus in the electrolyte are subjected to a reduction reaction on a stainless steel substrate as a negative electrode to be co-deposited on the stainless steel substrate to form a nickel-phosphorus alloy with an amorphous structure and a smooth surface, and therefore the corrosion resistance of the coating is improved; since the nano silicon carbide is inlaid in the nickel-phosphorus alloy, on the one hand, the nano silicon carbide forms a micro-nano double-roughness structure with thenickel-phosphorus alloy, and forms an air layer between the nano silicon carbide and water drops when making contact with the water drops, so that a hydrophobic structure is formed, and the corrosionresistance is improved; and on the other hand, the wear resistance of the coating is improved, and the service life of the coating is prolonged.

The invention discloses a preparation method of an aluminum alloy and rare earth nickel base electromagnetic shielding layer. The method comprises the steps of placing the aluminum alloy base material into chemical plating solution for 10-15 minutes and taking out, so that a rare earth nickel base electromagnetic shielding layer with the thickness of 0.01-0.1mm and the plated state hardness of 550-650Hv is obtained on the surface of the aluminum alloy base material, wherein the chemical plating solution comprises 0.10-0.13mol/L NiC12.6H2O, 0.02-0.03mol/L FeSO4.7H2O, 0.03-0.04mol/L reducing agent, 0.07-0.09mol/L Na2C4H4O6.2H2O, 0.07-0.075mol/L aminoacetic acid, 0.035-0.05mol/L H3BO3, (1-2)*10<-3>mol/L stabilizing agent and 3-5g/L micro nano molybdenum disulfide particles; and the PH value of the chemical plating solution is adjusted to 7-8 by KOH and/or NaOH, and the aluminum alloy base material is placed into the solution. The preparation method can perform modification treatment for the aluminum alloy surface, so that the wear resistance, corrosion resistance, conductivity and hardness of the aluminum alloy surface layer are greatly improved.

The invention provides a nickel-polytetrafluoroethylene plating and a wear-resistant anti-static rolling needle comprising the plating. The plating comprises nickel metal particles and polytetrafluoroethylene particles, wherein the nickel metal particles and the polytetrafluoroethylene particles are dispersed in the plating. The plating is obtained by electroplating of a mixed plating solution containing ammonia water, nickel salt and the polytetrafluoroethylene particles, wherein the mixed plating solution is stable in performance, and the polytetrafluoroethylene particles have high dispersity in the mixed plating solution and do not coagulate. In the electroplating process, when nickel ions of nickel-ammine complexing cations adsorbing the polytetrafluoroethylene particles are reduced and deposited on a cathode plate, the polytetrafluoroethylene particles can be released and uniformly co-deposited on the cathode plate along with the nickel ions, and therefore the nickel-polytetrafluoroethylene mixed plating with a smooth and dense surface is obtained.