160 results about "Cobalt nickel alloy" patented technology

The invention relates to a preparation method of a magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material. The method comprises the following steps: 1) preparing a precursor solution containing two or more magnetic metal ion salts; 2) stirring the porous carbon spheres in the precursor solution for impregnation; 3) filtering out the porous carbon spheres, washing and drying; 4) calcining the dried porous carbon spheres in an inert atmosphere; and 5) cooling to room temperature in an inert atmosphere to obtain the magnetic-alloy-loaded porous carbon sphere composite wave-absorbing material. The iron salt/cobalt salt, iron salt/nickel salt and cobalt salt/nickel salt mixed precursor solution are introduced to the inside of the ducts of the carbon spheres by using the high specific area and strong adsorptivity of the porous carbon spheres through the capillary actions and are combined with the hydrophilic oxygen-containing functional group; and finally, the drying and sintering treatment in the inert atmosphere are performed to obtain the iron-cobalt/iron-nickel/cobalt-nickel-alloy-loaded porous carbon sphere composite material. The whole preparation process is simple in technique and convenient to operate, and has low requirements for the production equipment.

Provided is a copper foil for printed circuit comprising a roughened layer on a surface of a copper foil by way of copper-cobalt-nickel alloy plating, a cobalt-nickel alloy plated layer formed on the roughened layer, and a zinc-nickel alloy plated layer formed on the cobalt-nickel alloy plated layer, wherein the total amount of the zinc-nickel alloy plated layer is 150 to 500 μg/dm², the lower limit of the nickel ratio in the alloy layer is 0.16, the upper limit thereof is 0.40, and the nickel content is 50 μg/dm² or more.

With the development of electronic equipment, the miniaturization and high integration of semiconductor devices have advanced further. This tendency has led to a demand for the adoption of a higher temperature in treatment in a production process of printed circuits and has led to heat generation during the use of electronic equipment after the productization. The present invention provides a technique that, even under these circumstances, the adhesive strength between a copper foil and a resin base material does not decrease and the penetration into a circuit edge part can be effectively prevented when performing the soft etching of a copper foil circuit.

A cobalt-nickel alloy composition is disclosed comprising, by weight about 30% to about 50% cobalt, about 20% to about 40% nickel, at least about 10% chromium, aluminum; and at least one refractory metal. Moreover, the alloy composition comprises an L1₂-structured γ′ phase having the formula (Co, Ni)₃(Al,Z), wherein Z is at least one refractory metal. Various components made from, or cladded with, the cobalt-nickel alloy compositions are also described.

The invention belongs to the field of magnetic material, relating to an electromagnetic shielding material and the making method thereof. The invention is a composite metallic film formed on a conductive substrate by multiple deposition in the water solution, and the obtained composite metallic film is 1-100 mum thick, and each layer of the composite metallic film is 1.1-99.9 mum thick, and the combination between the layers of the composite film is by chemical bond, and each layer is layered. The substrate can be stainless steel, copper plate, Ti plate, Al plate or one of the corrosion-resistant alloy plates, and also made of conductive glass, conductive plastics, polymer high molecular material, or other material; the composite metallic film comprises two or above different metallic film layers; each metallic film layer can be of copper, iron, iron-nickel alloy, nickel-cobalt alloy, iron-cobalt alloy or iron-cobalt-nickel alloy. The invention can shield the frequencies between 50Hz and 100 Hz and the shielding efficacy reaches above 70dB.

The invention provides a composite-coating continuous casting crystallizer copper plate with a long service life and a manufacturing technology thereof and belongs to the technical field of electroplating. The composite-coating continuous casting crystallizer copper plate with the long service life comprises a copper plate substrate and a coating on the surface of the copper plate substrate. The coating comprises an upper electroplating layer and a lower coating layer. The upper electroplated layer is a pure nickel layer or a low-cobalt nickel alloy layer resistant to high temperature and corrosion. The mass percent of cobalt in the low-cobalt nickel alloy layer is not higher than 3%. The lower coating layer is a wear-resistant coating layer or a ceramic coating layer. According to the composite-coating continuous casting crystallizer copper plate with the long service life and the manufacturing technology thereof, the electroplating technology and the supersonic thermal coating technology are combined, the upper portion and the lower portion of the crystallizer copper plate are different alloy coating layers, the different requirements for the upper portion and the lower portion of the crystallizer copper plate in continuous casting are effectively met, the upper electroplating layer is not prone to thermally cracking and falling at a high temperature, the lower coating layer has the excellent wear-resistant performance, in this way, the service life of the continuous casting crystallizer copper plate is greatly prolonged, and the product quality is greatly improved.

The present invention provides a copper foil for printed circuit boards and a method for manufacturing the same, the copper foil has high visibility of penetrating an insulating base material, and it is possible to avoid inleakage and peeling in a process of manufacturing the printed circuit board. The copper coil for the printed circuit board is characterized in that the copper coil is used for forming a conductor distribution picture of the printed circuit board and is pasted to the surface of the insulating base material, and has a cobalt-nickel alloy plating layer in which a chroma (based on Japanese Industrial Standard JIS Z 8729) c *= (a*2 + b*2) 1/2 of the surface of the copper coil is less than 6 optically detected by spacing the insulating base material.

The invention belongs to the technical field of microwave absorbing materials, and relates to a carbon-nano-tube composite microwave absorbing material and a preparation method thereof. According to the material, a catalyst is dissolved in a liquid carbon source containing an additive to prepare a precursor solution, then, a pressureless sintering method is adopted to prepare the composite microwave absorbing material of which matrixes are carbon nano tubes, iron particles and cobalt-nickel alloy particles are added in the inner walls of the carbon nano tubes, and rare-earth compounds are attached to the outer walls of the carbon nano tubes; the liquid carbon source is a 1,2-dichloroethane solution, the additive is lanthanum nitrate, and ethyl alcohol which promotes the dissolution of lanthanum nitrate is further added in the liquid carbon source; the volume ratio of the 1,2-dichloroethane solution to ethyl alcohol is 9:1, and the catalyst contains 33.93 wt.% of ferrocene, 33.19 wt.% of cobaltocene and 32.88 wt.% of nickelocene. The carbon-nano-tube composite microwave absorbing material has the advantages of being light in weight, wide in absorption frequency band, extremely improved in microwave absorbing performance, high in environmental corrosion resistance and wide in application range; carbon-nano-tube filler prepared by the preparation method is high in purity and few in impurity.

A cobalt-nickel alloy composition comprising by weight (wt %): about 31 to 42 percent cobalt (Co); about 26 to 31 percent nickel (Ni); about 10 to 16 percent chromium (Cr); about 4 to 6 percent aluminium (Al); about 6 to 15 percent tungsten (W); the Co and Ni being present in an atomic ratio of about 1.3:1

An electroplating bath medium for electroplating articles with a tin-cobalt, tin-nickel, or tin-cobalt-nickel alloy comprises: at least one tin salt; an alloying metal salt comprising a cobalt salt and/or a nickel salt; a complexant comprising a hydroxycarboxylic acid or alkali metal salt thereof such as a sodium or potassium gluconate or heptonate complexant; boric acid; and a bath soluble substituted phenolic compound. The current regime applied to the plating bath can include time intervals of direct current and of pulsed current in order to selectively control the deposition of tin by activation or diffusion control.

The invention relates to a method for preparing an anode-catalyzed electrode for electrolyzing slurry coal, i.e. a method for preparing an alloy electrode of which the metallic titanium base material is coated with cobalt and nickel oxides and platinum, belonging to the technical field of chemical material preparation process. The method comprises the following steps of: (1) pretreating a metallic titanium substrate; (2) generating a platinum-cobalt-nickel alloy catalyst layer on the titanium substrate by a constant-current and stepped electrolytic deposition method; and (3) after the electrolytic deposition of the metal on the titanium substrate, heat-pretreating in an oven and heat-posttreating in a muffle furnace with a treating temperature of 400-600 DEG C. The main electrolytic deposition process is carried out in an electrolytic bath, and main salts for depositing platinum, cobalt and nickel are respectively H2PtCl6.6H2O, CoSO4.6H2O and NiSO4.7H2O. Ti/Pt-CO3O4, Ti/Pt-NiO and Ti/Pt-CO3O4-NiO catalyzed electrodes prepared by the method can provide the current density and the current efficiency in the electrolytic process and have higher catalytic activity.

The invention discloses a preparation method of high-magnetic micro-particle-size nano magnetic beads. The preparation method comprises the following steps: mixing iron chloride, cobalt chloride and nickel chloride in an equal ratio to obtain a metal salt mixture; mixing ethylene glycol with the metal salt mixture sufficiently under the condition of mechanical stirring to obtain a mixture of the ethylene glycol and metal salt; adding sodium acetate into the mixture of the ethylene glycol and the metal salt, and continuing to stir to obtain a mixed solution; pouring the mixed solution into a non-metallic reaction kettle; placing the reaction kettle in a temperature-controlled oven, and controlling the oven to operate according to a preset procedure to make the mixed solution be subjected toa thermal reaction to form iron-cobalt-nickel alloy Fe-Co-NiOx magnetic nanoparticles; magnetically separating the iron-cobalt-nickel alloy Fe-Co-NiOx magnetic nanoparticles, and washing and drying;coating the surface layers of the iron-cobalt-nickel alloy Fe-Co-NiOx magnetic nanoparticles with a carbon layer and a silicon dioxide layer sequentially, and covalently grafting polyethylene glycol onto an outermost layer. The preparation method disclosed by the invention solves the technical problems of relatively large particle size, wide distribution range, small specific surface area and lowmagnetic response of magnetic beads in the prior art.

The invention discloses a cobalt-nickel-free based alloy for a strengthening coating of a sealing surface of a nuclear power valve. The alloy contains the following components by weight percentage: 37.5%-38.5% of chromium, 5.0-6.0 % of carbon, 2.0%-2.5% of silicon, 1.0%-1.5% of boron, 0.5%-1.5% of yttrium oxide and the balance of nickel. The mixing alloy powder is compounded, and the strengthening coating is prepared by a laser cladding technology. The obtained cobalt-nickel-free based alloy strengthening coating of the sealing surface of the nuclear power valve has the relative parameters as follows: the average hardness HRC is 45-50, and is 39-43 higher than the traditional cobalt-nickel alloy coating; the grain size is 11-12, and is finer than the traditional plasma spray-welding coating of 9-10 and the flame surfacing welding layer of 8-9, which is favorable for the comprehensive mechanical property correspondingly; the combined bandwidth of the coating and the base body is 25-40 mum, and is compacter than the traditional plasma spray-welding combined band with the width of 80-120 mum and the flame surfacing welding combined band with the width of 20-300 mum. The invention has the advantages of saving of noble metal, i.e. cobalt, cost reduction, simple preparation technology, conformance to special requirement of nuclear environment, and the like.

The invention provides a manufacturing method of fine-grain high-hardness tungsten cobalt nickel alloy. The manufacturing method comprises the following steps of 1 respectively weighing tungsten powder, cobalt power and nickel powder, 2 adding the tungsten powder, cobalt power and nickel powder into a mixing machine for mixing to obtain mixed powder, 3 pressing the mixed powder to form a press blank, 4 sintering the press blank to obtain a sintered blank and then performing vacuum annealing on the sintered blank to obtain the fine-grain high-hardness tungsten cobalt nickel alloy. The size of the manufactured fine-grain high-hardness tungsten cobalt nickel alloy prepared by means of the manufacturing method is not larger than 20 microns, the hardness is not smaller than 35, and the fine-grain high-hardness tungsten cobalt nickel alloy is small in grain and high in densification degree.

The invention discloses a preparation method of a high-tungsten and high-cobalt nickel alloy high- purity fine-grained bar material. The alloy composition is of 25 wt.% - 45wt.% of tungsten, 15 wt.% -30 wt.% of cobalt and the balance nickel. A vacuum induction melting mode is adopted, a high-tungsten high-cobalt nickel alloy ingot is heated to 1150 - 1250 DEG C after casting, and forging is carried out after heat preservation; the forging adopts a repeated deformation route alternating radial drawing-out with axial upsetting, the deformation amount of each firing is 15% - 35%, blanks after different firing forging in the middle is subjected to furnace returning heat preservation, and the time of furnace returning heat preservation is 30 - 120 min; and the final forging temperature is greater than or equal to 1000 DEG C, and the deformation amount of the last firing forging is more than or equal to 25%. According to the preparation method of a high-tungsten and high-cobalt nickel alloyhigh- purity fine-grained bar material, the oxygen content of a prepared high-tungsten high-cobalt nickel alloy bar material is less than or equal to 30 ppm, the sulfur content is less than or equalto 20 ppm, and the sound speed can reach 5015 m/s; and according to the preparation method, the requirement on equipment capacity can be reduced by adopting a hot forging mode, the obtained bar material is uniform in deformation, free of defects such as surface cracks, has internal structure with fine and uniform grains, has ideal microstructure and excellent mechanical property, the grain size can exceed 5 grade, the grade difference does not exceed 2 grade, ultrasonic flaw detection can reach class A, the elongation reaches 68%, and the tensile strength reaches 980 MPa.

The invention discloses a plating solution for electroplating a tungsten-cobalt-nickel alloy on a surface of structural steel. The plating solution is composed of 12-18 g/L of cobalt sulfate, 80-84 g/L of sodium tungstate, 14-18 g/L of nickel sulfate, 34-38 g/L of boric acid, 30-36 g/L of sodium sulfate, 20-24 g/L of ammonium sulfate, 30-34 g/L of tartaric acid, 11-15 g/L of potassium pyrophosphate, 10-14 g/L of ascorbic acid, 1-3 ml/L of formaldehyde, 2-4 ml/L of dimethyl hexynol, and the balance being water.

The invention discloses a graphene oxide/cobalt-based composite plating as well as a preparation method and application thereof. The preparation method comprises the following steps: soaking cobalt, nickel or a cobalt-nickel alloy serving as a positive electrode and a workpiece to be plated serving as a negative electrode in a composite electroplating solution for ultrasonic oscillation; performing electro-deposition on the workpiece to be plated by adopting pulse current to obtain the graphene oxide/cobalt-based composite plating, wherein the composite electroplating solution is prepared from30 to 200 g/L of cobalt salt, 30 to 200 g/L of nickel salt, 5 to 80 g/L of phosphate, 10 to 60 g/L of boric acid, 10 to 50 g/L of a complexing agent, and 0.1 to 5 g/L of graphene oxide and the balance of deionized water. The preparation method is simple, efficient and environmentally friendly. The composite plating has the advantages of high hardness, superior wear resistance and corrosion resistance, and can be widely applied to various mechanical parts which have high requirements on hardness, wear resistance, low friction coefficient and high corrosion resistance as a functional protectionlayer.