CN102145386B - Method for preparing metal with surface coated with nano nickel - Google Patents
Method for preparing metal with surface coated with nano nickel Download PDFInfo
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- CN102145386B CN102145386B CN 201110115881 CN201110115881A CN102145386B CN 102145386 B CN102145386 B CN 102145386B CN 201110115881 CN201110115881 CN 201110115881 CN 201110115881 A CN201110115881 A CN 201110115881A CN 102145386 B CN102145386 B CN 102145386B
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Abstract
The invention discloses a method for preparing a metal with the surface coated with nano nickel. The metal is ultrafine tungsten powder or molybdenum powder with the average grain diameter D50 not more than 1.3Mum. The method comprises the following steps of: adding the powder into an Ni2<+> soluble salt solution while continuous stirring is carried out, adding a high polymer surfactant containing coordination group rich in N and O atoms, and stirring to be uniform; then adding a certain amount of NaOH, KOH, ammonia water or Na2CO3, K2CO3 solution into the uniformly stirred solution to regulate pH value of the system to be higher than 6; heating the solution to 40-95 DEG C, adding at least one of hydrazine hydrate, sodium hydrosulphite or sodium hypophosphite as a reducing agent, reacting for 0.5-2 hours, and defoaming with ethyl alcohol or deionized water in the reaction process; filtering, washing with the deionized water, then washing with a 1-10% diluted NH4Cl or NH4NO3 solution; beating the obtained powder with 0.2-5.0% fatty acid alcoholic solution, modifying the surface of composite powder, filtering again, and heating and drying the powder under the atmosphere of H2 to obtain the ultrafine tungsten powder and molybdenum powder with the surface uniformly coated with nickel metal in nanometer thickness.
Description
Technical field:
The invention belongs to Non-ferrous Metallurgy and powdered metallurgical material technical field, relate to a kind of alloy powder that adopts chemical method to prepare powder used in metallurgy, be specially the method for a kind of ultrafine molybdenum powder or ultrafine tungsten powder surface clad nano nickel.
Background technology:
In powder metallurgy was produced, the consumption of premixed powder was more and more, used the consistent premixed powder that mixes, distributes can prepare the alloy product of even tissue, excellent performance.
1. the pseudo-alloy all be made up of two kinds of immiscible metals of molybdenum-copper and tungsten-copper alloy has high heat conduction, electric conductivity, is widely used as the heat sink material of microelectronics Packaging.
Because it is immiscible between tungsten, molybdenum and the copper, and Mo is dissolving hardly in liquid phase copper, material migration mechanisms such as dissolution precipitation and grain shape sphering can't take place in the liquid-phase sintering densification process, in the sintering process, because nonwetting between copper particle and the molybdenum particle, copper segregation occurs or enrichment causes tissue odds even, the hole defective occurs, and the performance of alloy reduces greatly.
Present molybdenum copper, Tungsten-copper Composites preparation method mainly contain infiltration method (as United States Patent 6475429,6271585); Common mixed powder sintering method (as United States Patent 5292478).Because the nonwetting problem of tungsten and copper, these two kinds of methods all are difficult to obtain even, fine and close tungsten copper, molybdenum-copper material.Adding active element Ni and can improve the density of alloy, mainly is because Ni can be dissolved in Mo, can be dissolved in Cu again, improves the material transition process and improved wetability between Mo and the Cu phase in sintering.
Common mixed powder method is with in the Mo powder in the Ni adding, the employing batch mixer mixes or ball milling mixes, but mechanical means can not make Mo powder and Ni powder mix, can not guarantee that the Ni particle provides interface " bridge " effect for all Mo particles and Cu particle, still exists local non-uniform phenomenon; And chemical method can be deposited on nano level Ni particle around the Mo particle very equably, realize that the Mo particle is by metal Ni homogeneous immersion, thereby there is good interface to be combined with the Cu particle, Ni and Cu and Mo diffuse to form metallurgical binding mutually, obtaining the alloy of high comprehensive performance, is the key condition that obtains the excellent properties alloy so the preparation surface is coated with pre-alloyed powder complete, the even transition layer.
2. present, preparing high performance tungsten composites has become the developing direction of high added value and high-grade, precision and advanced dual-use high-tech product, tungsten base high-specific-gravity alloy (W-Ni-Fe/W-Ni-Cu) has mechanical properties such as high strength, high density, good ray absorption capacity and electrical property such as high pressure resistant are widely used in alpha ray shield protective materials, weight material, inertia material, dynamic balancing material, shrapnel armor-piercing bullet bullet core bullet kinetic energy material, die material, anvil piece etc.All be widely used in fields such as information, the energy, metallurgy, Aero-Space, defence and military and nuclear industry.
But up to the present, it is that micron order (2 ~ 6 μ m) tungsten powder and several micron form to alloy powder (as Ni, the Fe powder) mixing of tens microns, the back sintering that is shaped that granularity is adopted in the preparation of tungsten base high-specific-gravity alloy mostly, and alloy grain is organized thick; And having the inhomogeneous phenomenon of microscopic structure, bonding is not distributed in the W skeleton mutually fully, has strengthened the material fed distance between powder particle, has reduced densification degree and the speed of alloy.
Superfines particularly nano level powder is one of the most popular at present new material.US military adopts chemical vapour deposition (CVD) (Chemical Vapor Deposition, CVD) method successfully is deposited on the W particle surface with Ni, Fe, prepared nanometer W-Ni-Fe composite powder, and the Ni on the W powder, Fe coating layer thickness are even, particle size distribution is narrower.(carbide alloy, 2000 the 17th volume the 1st phase) but this kind method complex process and power consumption are bigger.We adopt chemical plating method, binding molecule self-assembling technique, W powder surface is coated go up complete uniform nanometer Ni, make group of alloys be woven with the good interface combination.
For above-mentioned tungsten base molybdenum-base alloy, in process of production, all to make the surface and coat evenly complete transition zone from the interface of powder metallurgy, can prepare the alloy product of high-compactness.
Patent documentation CN1817521A discloses a kind of method of copper powder surface cladded with nickel, adopts the general chemistry method of reducing, with hydrazine nickelous sulfate is reduced, and obtains coating the copper powder of nickel; Do not add molecular template, complexometric reagent etc. in this method, covered effect may be inhomogeneous like this, the nickel grain graininess is difficult to control.
Patent documentation CN101041180A discloses the method for a kind of ball aluminum powder surface clad nano nickel, and adding hydrazine hydrate with boron hydride is reducing agent, obtains the aluminium powder of surperficial clad nano nickel.
Korean Patent (publication number KR20040083983A) discloses a kind of diamond composite powder method that adopts hydro-thermal hydrogen reduction preparation to coat nickel, main feature is that diamond surface has carried out the sensitization activation processing, with be stannous chloride and palladium bichloride, though obtained coating good composite powder, but this kind method need feed the press device of hydrogen, operates more complicated and certain risk is arranged.Adopt pink salt palladium salt activation sensitization to be equivalent to bring impurity, the performance of alloy is had negative influence.
Patent documentation CN101429652A discloses a kind of method of iron powder nickel coat powder, also be to adopt hydro-thermal hydrogen reduction technology, with nickel sulfate solution, ammoniacal liquor, ammonium sulfate by a certain percentage proportioning become mixed solution, add additives such as anthraquinone, again iron powder is joined in the mixed solution, handle through the high-temperature high-pressure water solution hydrogen reduction at autoclave then, the nickel ion reduce deposition in the solution forms fine and close metal nickel dam or nano-nickel powder bag coating on the iron powder surface.
Yet there are no the research report that the molybdenum powder tungsten powder surface coats nickel.Be sub-micron, nano level tungsten powder, molybdenum powder surface clad nano nickel equably at particle diameter, do not introduce impurity, and THICKNESS CONTROL, all is difficult to realize with reference to said method in nanometer range; The reduction process of nickel is more violent in addition, occurs danger easily, also needs to consider these factors in reduction process.
Summary of the invention:
In order to overcome above-mentioned deficiency of the prior art, the invention provides the preparation method of a kind of metal surface clad nano nickel, be specially and adopt numerator self-assembly technique control metallic nickel granular size and coating thickness, at ultrafine molybdenum powder, tungsten powder surface reduce deposition metallic nickel; Adjust the severe degree of reaction simultaneously, the preparation surface coats tungsten powder, the molybdenum powder of even complete nanometer nickel.
The object of the present invention is achieved like this:
The preparation method of a kind of metal surface clad nano nickel, described metal is average grain diameter D
50Be not more than ultrafine tungsten powder or the molybdenum powder of 1.3 μ m, under constantly stirring, join Ni
2+In the soluble-salt solution, add the high molecular surfactant of the coordinating group be rich in N, O atom and stir; In its solution, add a certain amount of NaOH, KOH, ammoniacal liquor or Na then
2CO
3, K
2CO
3The pH value of solution regulation system makes the pH value of system more than 6; Be heated to 40 ~ 95 ℃, adding is a kind of as reducing agent of hydrazine hydrate, sodium dithionite or sodium hypophosphite at least, and the reaction time is 0.5 ~ 2 hour, during with alcohol or deionized water froth breaking; Filter, use deionized water rinsing, use rare NH of 1 ~ 10% then
4Cl or NH
4NO
3The solution flushing; The gained powder carries out surface modification with the alcoholic solution making beating of 0.2 ~ 5.0% aliphatic acid to composite powder, filters again, and the gained powder is at H
2Heat drying under the atmosphere obtains ultrafine tungsten powder, the molybdenum powder of coated with uniform nano thickness metallic nickel.
Concrete preparation method is as follows:
The first step, measure deionized water, with Ni
2+The soluble-salt dissolving is made into Ni
2+Solution concentration is between 0.1 ~ 2mol/L; Then particle mean size is joined Ni less than ultrafine molybdenum powder or the tungsten powder of 1.3 μ m
2+Go in the solution, and powerful the stirring;
Second the step, in first step prepared solution, add molecular template, also be high molecular surfactant, and stir,
The 3rd step, in the second step solution that constantly stirs down NaOH, KOH, ammoniacal liquor or the Na of adding concentration between 0.1 ~ 3.0mol/L
2CO
3, K
2CO
3The pH value of solution regulation system makes the pH value of system between 5 ~ 12;
The 4th step, continue to stir, when the temperature of solution is heated to uniform temperature, add reducing agent, in order to prevent that because of the bumping that occurs uneven in temperature, reductant solution also is heated to uniform temp in advance; Can observe tangible nickel reduction reaction phenomenon; If the alkaline solution that adds is Na
2CO
3Perhaps K
2CO
3, behind 2min, just can see tangible nickel juvenescence (bubble, bumping occurring growing), reduction reaction is very violent, if adding is NaOH or KOH solution, occurs later on about 20min greatly; Though NaOH or KOH adjusting pH value are more obvious, OH
-Radical ion is to Ni
2+The Complex effect of ion is than CO
3 2-Radical ion is strong, has delayed Ni
2+Dispose procedure, so reduction take place will be later;
When the 5th step, the generation of nickel reduction reaction, reaction is violent, the bumping phenomenon occurs, a large amount of bubbles occur, needs to drip alcohol or deionized water froth breaking, prevents from overflowing reaction vessel; After nickel reduction takes place, react and to stop in 0.5 ~ 2 hour;
After the 6th step, reaction finish, adopt and stir or the method for water quench is down to the temperature in the reaction vessel below 30 ℃, filter then, with deionized water rinsing powder secondary at least; Be rare NH of 1 ~ 10% then with concentration
4Cl or NH
4NO
3Solution flushing at least twice, the anion that the flush away powder surface adheres to, cation; Filtrate is reclaimed ammonium salt, sodium salt or sylvite through evaporation, concentrated, crystallization simultaneously;
The 7th step, gained powder carry out modification with the making beating of 0.5 ~ 5.0% aliphatic acid ethanol solution to the superfines surface, avoid in dry run, cause grow up reunion or harden of particle;
The 8th step, filtration again, the gained powder is at H
2Drying is 1 ~ 2 hour under the atmosphere, and temperature is 50 ~ 105 ℃; Then at H
2Be cooled to 20 ℃ under the atmosphere, take out, use the aluminium foil bag vacuum packaging;
The 9th step, according to the different instructions for uses of powder, coating the nickel amount is 0.5 ~ 25%(wt%), by numerator self-assembly technique, can plate nanometer nickel transition zone at molybdenum powder or tungsten powder bag, for alloying provides good interface.
Described Ni
2+Soluble-salt is nickelous sulfate or nickel chloride or nickel nitrate, the Ni that is made into
2+The solution total concentration is between 0.1 ~ 2mol/L, and wherein coating the nickel amount is 0.5 ~ 25%(wt%).
Used high molecular surfactant is: one or more in Qu Latong, polyethylene glycol (PEG), polyacrylic acid (PAA), the polypropylene-base pyrrolidones (PVP).Concentration is 0.5 ~ 10.0%(wt%), and addition is 0.01 ~ 2%(V/V) of overall solution volume.
Used reducing agent is a kind of of hydrazine hydrate, sodium dithionite or sodium hypophosphite, and concentration is between 0.05 ~ 3.5mol/L.
Described aliphatic acid is a kind of of oleic acid, stearic acid or soft ester acid, and alcohol is a kind of of ethanol or propyl alcohol.
The alkali of regulating the pH value is NaOH, KOH, ammoniacal liquor or Na
2CO
3, K
2CO
3In one or more, concentration is between 0.1 ~ 3 mol/L.
Add reducing agent after being heated to uniform temperature, this temperature range is 40 ~ 95 ℃, and the reaction time is 0.5 ~ 2 hour; The reductant solution temperature that adds will be heated to the temperature of system in advance.
In the nickel reduction reaction process, drip absolute ethyl alcohol, propyl alcohol or deionized water froth breaking.
The present invention has following characteristics: binding molecule self-assembling technique principle, plate the even nickel transition zone of one deck at ultrafine tungsten powder, molybdenum powder surface bag, and saved activation sensitization step, and bag plating amount, uniformity and the granularity of nickel are all controlled; Filtrate can be recycled, and also can recycle, and realizes the refuse zero-emission of production process.
The specific embodiment:
Example 1: adopt Na
2CO
3Regulate the pH value, the molybdenum powder surface coats 10% nickel transition zone.
Prepare the nickel sulfate solution of 1695mL 0.5mol/L, constantly stir down, add 500g ultrafine molybdenum powder (average grain diameter is less than 1.3 μ m) to it; Add 24mL concentration then and be 3% Qu Latong solution, have foam to occur in the solution, adding 1356mL concentration is the Na of 1.6mol/L
2CO
3The grass green precipitation appears in solution, and the pH value of system is approximately about 10.Mixed solution is heated to 70 ℃, adding temperature and be 70 ℃, 1695 mL concentration is the hydrazine hydrate solution of 3mol/L, greatly behind 2 ~ 3min, begin to occur violent nickel juvenescence, bumping also has a large amount of bubbles to occur, and at this moment will constantly drip the ethanol froth breaking, behind the reaction 90min, can stop heating, can adsorb black powder with magnet, illustrate that nickel generates; Open cooling water the temperature of system is down to below 30 ℃, use suction filtration machine filtering-depositing, and precipitate secondary with deionized water rinsing, use rare NH of 5% then
4Cl solution flushing secondary is transferred to powder in 5% the fatty acid mixed absolute ethyl alcohol and stirs 30min, filters again, and the gained powder is at tube furnace, H
2Drying is 1 hour under the condition that atmosphere is 105 ℃, and at H
2Be cooled to 20 ℃ under the condition, the aluminium foil vacuum packaging is used in discharging.Powder weighing is 545.2g, and nickel content is 8.7%.
Example 2: adopt NaOH to regulate the pH value, sodium dithionite is made reducing agent, coats 20% nickel transition zone on the molybdenum powder surface.
Under continuous stirring, the 500g ultrafine molybdenum powder is joined in the nickel sulfate solution that 2260ml concentration is 0.75mol/l, add 45mL concentration and be 2% PVP(polyethylene than pyrrolidone) and 45mL concentration be 2% polyacrylic acid solution, stir.Adding 2500mL concentration is the NaOH solution of 2mol/L, the celadon precipitation appears, the pH value of system is 11, add the system heating, design temperature is 40 ℃, behind the heating 30min, solution temperature is that 40 ℃ of adding 1950mL concentration are the hydrosulfurous acid sodium solution (temperature is 40 ℃) of 0.5mol/L, behind 15min, the beginning vigorous reaction, during constantly drip the deionized water froth breaking.The gained powder filter is 10% NH with concentration
4NO
3Solution washing 2 times, suction filtration then, the oleic acid ethanol solution making beating with 0.5% is filtered; The gained powder is at H
2Dry 90min under the condition that atmosphere is 100 ℃, and at H
2Be cooled to 20 ℃ under the condition, the aluminium foil vacuum packaging is used in discharging.Powder weighing is 593.7.2g, and nickel content is 16.8%.
Example 3: adopt ammoniacal liquor to regulate the pH value, tungsten powder surface coats 1% nickel transition zone.
Prepare the nickel sulfate solution that 255mL concentration is 0.2mol/L, move in the beaker, under constantly stirring, add 20mL concentration and be 1% mean molecule quantity and be 12000 PEG solution, adding 1088mL concentration is the ammonia spirit of 1mol/L, and the pH value of system is 11, the celadon precipitation appears in the beaker, add 300g ultrafine tungsten powder (average grain diameter is less than 1.3 μ m) then, after stirring, mixed solution is heated to 70 ℃, adding temperature is 70 ℃, 200 mL concentration are the hydrazine hydrate solution of 3mol/L, the temperature of system is heated to 90 ℃, during tangible nickel juvenescence does not appear, be heated to after 90 ℃, after approximately having crossed 20min, the bumping phenomenon occurs, the reduction of nickel just begins, during constantly drip ethanol water froth breaking, but solution is white green always in the course of reaction, after reaction continues 60min, just do not have bubble to occur, stop reaction, opening cooling water is down to the temperature of system below 30 ℃, with suction filtration machine filtering-depositing, and precipitate secondary with deionized water rinsing, use rare NH of 5% then
4Cl solution flushing secondary is transferred to powder in 5% the fatty acid mixed absolute ethyl alcohol and stirs 30min, filters again, and the gained powder is at tube furnace, H
2Drying is 1 hour under the condition that atmosphere is 105 ℃, and at H
2Be cooled to 20 ℃ under the condition.The aluminium foil vacuum packaging is used in discharging.Powder weighing is 302.7g, and nickel content is 0.92%.
Example 4: adopt inferior sodium phosphate to make reducing agent, coat 15% nickel transition zone at ultrafine tungsten powder surface.
Under constantly stirring, it is in the nickel chloride solution of 1mol/L that the 1000g ultrafine tungsten powder is added 2550ml concentration, and adding 56mL concentration is 5% PVP solution.Adding 10L concentration is the ammonia spirit of 3mol/L, and the pH value is 9.Setting heating-up temperature is 80 ℃, and behind the heating 40min, the temperature of system is 80 ℃, and adding 1.9L concentration is the ortho phosphorous acid sodium solution (being heated to 80 ℃ in advance) of 1.5mol/L, violent nickel juvenescence namely occurs, heated at constant temperature 2 hours behind the adding 10min; The gained powder filter is used 5%NH respectively
4Cl solution washing secondary filters, and with the anhydrous propanol solution making beating of 3% aliphatic acid, filters then.The gained powder is at H
2Drying is 2 hours under the condition that atmosphere is 100 ℃, and at H
2Be cooled to 20 ℃ under the condition, the aluminium foil vacuum packaging is used in discharging.Be weighed as 1145.8g, nickel content is 12.9%.
Adopt the foregoing invention method can finish the preparation of average grain diameter less than molybdenum powder or the tungsten powder surface clad metal nickel of 1.3 μ m, the content of nickel transition zone is freely controlled according to using, and enumerates no longer one by one herein.
Binding molecule self-assembling technique of the present invention is at tungsten powder molybdenum powder surface clad nickel.The nanometer package technique is the technology of a kind of new preparation nano material that grows up recent years, and molecule self assembly (molecular self-assembled) refers to by the synergy spontaneous process that form supramolecular ordered aggregation with certain 26S Proteasome Structure and Function of little branch submodule by non-covalent bond weak interaction forces such as hydrogen bond, metal-complexing, π-π effect, cation-π effect, Van der Waals forces.Main implementation procedure is: make the template agent to the inorganic or organic precursor channeling conduct under the free state under the condition that solvent exists, realize the structural change of disorder to order.
Above embodiment only is used for explanation preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; in the ken that described field those of ordinary skill possesses; any modification of doing within the spirit and principles in the present invention, be equal to and substitute and improvement etc., it all should be encompassed within the technical scheme scope that the present invention asks for protection.
Claims (6)
1. the preparation method of a metal surface clad nano nickel, described metal is average grain diameter D
50Be not more than ultrafine tungsten powder or the molybdenum powder of 1.3 μ m, under constantly stirring, join Ni
2+In the soluble-salt solution, add the high molecular surfactant of the coordinating group be rich in N, O atom and stir; In its solution, add NaOH, KOH, ammoniacal liquor or the Na of concentration between 0.1 ~ 3.0mol/L then
2CO
3, K
2CO
3The pH value of solution regulation system makes the pH value of system more than 6; Be heated to 40 ~ 95 ℃, adding is a kind of as reducing agent of hydrazine hydrate, sodium dithionite or sodium hypophosphite at least, and the reaction time is 0.5 ~ 2 hour, during with alcohol or deionized water froth breaking; Filter, use deionized water rinsing, use rare NH of 1 ~ 10% then
4Cl or NH
4NO
3The solution flushing; The gained powder carries out surface modification with the alcoholic solution making beating of 0.2 ~ 5.0% aliphatic acid to composite powder, filters again, and the gained powder is at H
2Heat drying under the atmosphere obtains ultrafine tungsten powder, the molybdenum powder of coated with uniform nano thickness metallic nickel;
Concrete preparation method is as follows:
The first step, measure deionized water, with Ni
2+The soluble-salt dissolving is made into Ni
2+Solution concentration is between 0.1 ~ 2mol/L; Then with average grain diameter D
50The ultrafine tungsten powder or the molybdenum powder that are not more than 1.3 μ m join Ni
2+Go in the solution, and powerful the stirring;
Second the step, in first step prepared solution, add molecular template, also namely be rich in the high molecular surfactant of the coordinating group of N, O atom, and stir,
The 3rd step, in the second step solution that constantly stirs down NaOH, KOH, ammoniacal liquor or the Na of adding concentration between 0.1 ~ 3.0mol/L
2CO
3, K
2CO
3The pH value of solution regulation system makes the pH value of system more than 6;
The 4th step, continue to stir, when being heated to the temperature of solution to 40 ~ 95 ℃, add reducing agent, in order to prevent that because of the bumping that occurs uneven in temperature, reductant solution also is heated to uniform temp in advance; Can observe tangible nickel reduction reaction phenomenon; If the alkaline solution that adds is Na
2CO
3Perhaps K
2CO
3, behind 2min, just can see tangible nickel juvenescence, namely occur growing bubble, bumping, reduction reaction is very violent, if adding is NaOH or KOH solution, occurs later at 20min; Though NaOH or KOH adjusting pH value are more obvious, OH
-Radical ion is to Ni
2+The Complex effect of ion is than CO
3 2-Radical ion is strong, has delayed Ni
2+Dispose procedure, so reduction take place will be later;
When the 5th step, the generation of nickel reduction reaction, reaction is violent, the bumping phenomenon occurs, a large amount of bubbles occur, needs to drip alcohol or deionized water froth breaking, prevents from overflowing reaction vessel; After nickel reduction takes place, react and to stop in 0.5 ~ 2 hour;
After the 6th step, reaction finish, adopt and stir or the method for water quench is down to the temperature in the reaction vessel below 30 ℃, filter then, with deionized water rinsing powder secondary at least; Be rare NH of 1 ~ 10% then with concentration
4Cl or NH
4NO
3Solution flushing at least twice, the anion that the flush away powder surface adheres to, cation;
Filtrate is reclaimed ammonium salt, sodium salt or sylvite through evaporation, concentrated, crystallization simultaneously;
The 7th step, gained powder are carried out modification with the alcoholic solution making beating of 0.2 ~ 5.0% aliphatic acid to the superfines surface, avoid in dry run, cause grow up reunion or harden of particle;
The 8th step, filtration again, the gained powder is at H
2Drying is 1 ~ 2 hour under the atmosphere, and temperature is 50 ~ 105 ℃; Then at H
2Be cooled to 20 ℃ under the atmosphere, take out, use the aluminium foil bag vacuum packaging;
The 9th step, coating the nickel amount was 0.5 ~ 25%(wt%), by numerator self-assembly technique, can plate nanometer nickel transition zone at molybdenum powder or tungsten powder bag, for alloying provides good interface according to the different instructions for uses of powder.
2. the preparation method of a kind of metal surface according to claim 1 clad nano nickel is characterized in that: described Ni
2+Soluble-salt is nickelous sulfate or nickel chloride or nickel nitrate.
3. the preparation method of a kind of metal surface according to claim 1 clad nano nickel, it is characterized in that: used high molecular surfactant is: one or more in Qu Latong, polyethylene glycol (PEG), polyacrylic acid (PAA), the polypropylene-base pyrrolidones (PVP);
Concentration is 0.5 ~ 10.0%(wt%), and addition is 0.01 ~ 2% of overall solution volume.
4. the preparation method of a kind of metal surface according to claim 1 clad nano nickel, it is characterized in that: used reducing agent is a kind of of hydrazine hydrate, sodium dithionite or sodium hypophosphite, and concentration is between 0.05 ~ 3.5mol/L.
5. the preparation method of a kind of metal surface according to claim 1 clad nano nickel, it is characterized in that: described aliphatic acid is a kind of of oleic acid, stearic acid or soft ester acid, alcohol is a kind of of ethanol or propyl alcohol.
6. the preparation method of a kind of metal surface according to claim 1 clad nano nickel is characterized in that: in the nickel reduction reaction process, drip the absolute ethyl alcohol froth breaking.
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| CN106825603B (en) * | 2016-12-31 | 2018-11-02 | 西安交通大学青岛研究院 | A kind of preparation method of aluminium cladding titanium composite alloy powder |
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| CN101168197A (en) * | 2006-10-25 | 2008-04-30 | 中南大学 | Method for preparing ultra-fine/nano tungsten-copper-nickel composite powder |
| CN100496814C (en) * | 2007-04-28 | 2009-06-10 | 北京有色金属研究总院 | Nanometer Ni cladded aluminium powder preparing method |
| CN101143330B (en) * | 2007-10-12 | 2010-09-08 | 浙江工业大学 | Nanocrystalline WC-Co-Ni catalyst |
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