US20070190348A1 - Composite metal article and production method thereof - Google Patents

Composite metal article and production method thereof Download PDF

Info

Publication number
US20070190348A1
US20070190348A1 US10/591,941 US59194105A US2007190348A1 US 20070190348 A1 US20070190348 A1 US 20070190348A1 US 59194105 A US59194105 A US 59194105A US 2007190348 A1 US2007190348 A1 US 2007190348A1
Authority
US
United States
Prior art keywords
metal
particles
modified
composite
carbon nanotubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/591,941
Other languages
English (en)
Inventor
Kouichi Ichiki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinano Kenshi Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to SHINANO KENSHI KABUSHIKI KAISHA reassignment SHINANO KENSHI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ICHIKI, KOUICHI
Publication of US20070190348A1 publication Critical patent/US20070190348A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/16—Metallic particles coated with a non-metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • C22C2026/002—Carbon nanotubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
    • Y10T428/12167—Nonmetal containing

Definitions

  • the present invention relates to a composite metal article and a production method thereof, and more particularly to a composite metal article in which carbon nanotubes are dispersed and a production method thereof.
  • the carbon nanotubes are added to and dispersed in an acid solution in which the metal particles have been dissolved, followed by drying and sintering, thereby obtaining the composite metal article.
  • the production method of the composite metal article proposed in this patent document has the disadvantages that a process thereof is extremely troublesome, that a long period of time is required, and that the production cost of the composite metal article becomes expensive.
  • a modified metal particle comprising carbon nanotubes and a metal such as copper with ends of the carbon nanotubes protruding in echinoid form, which is shown in FIG. 11 , can be obtained by an electrolytic process using a metal ion-containing electrolytic solution in which the carbon nanotubes are dispersed with a special dispersing agent, and that a composite metal article excellent in heat radiation properties can be formed by thermopressing such modified metal particles.
  • metal particles for example, copper particles
  • other metal particles for example, aluminum particles and alloy particles
  • the composite metal article containing the metal which is difficult to provide modified metal particles by an electrolytic process can provide a composite metal article having various physical properties as well as excellent heat radiation properties, as long as carbon nanotubes can be dispersed in the composite metal article.
  • an object of the invention is to provide a composite metal article with carbon nanotubes dispersed in the composite metal article containing a metal which is difficult to provide modified metal particles by an electrolytic process, and a production method thereof.
  • the present invention is a composite metal article characterized in that the composite metal article is formed by at least two kinds of metals, a first metal portion comprising one side of the above-mentioned two kinds of metals and a second metal portion comprising the other side of the above-mentioned two kinds of metals are formed at random, and carbon nanotubes are dispersed and incorporated in at least one side of the above-mentioned first metal portion and second metal portion.
  • the carbon nanotubes are mixed through modified metal particles modified with the carbon nanotubes which partially protrude outward from metal particles comprising at least a metal of the one side of the metals which form the composite metal article, thereby being able to prevent separation between the carbon nanotubes and the metal particles, even when compression molding is performed.
  • modified metal particles there can be suitably used modified metal particles obtained by an electrolytic process or an oxidation-reduction process.
  • the modified metal particles by the electrolytic process can be obtained by passing an electric current between a cathode and an anode immersed in an electrolytic solution in which the carbon nanotubes are dispersed.
  • the modified metal particles by the oxidation-reduction process can be obtained by an oxidation-reduction process of forming composite particles which contain the carbon nanotubes and comprise a metal salt or metal oxide slightly soluble in water, and then performing reduction treatment with a reducing agent which reduces the metal salt or metal oxide of the above-mentioned composite particles.
  • the present invention is a production method of a composite metal article characterized in that when there is produced the composite metal article formed by at least two kinds of metals, wherein a first metal portion comprising one side of the above-mentioned two kinds of metals and a second metal portion comprising the other side of the above-mentioned two kinds of metals are formed at random, carbon nanotubes are mixed in at least one side of the above-mentioned first metal portion and second metal portion, using modified metal particles modified with the carbon nanotubes which partially protrude outward from the above-mentioned metal particles.
  • the composite metal article in which the carbon nanotubes are dispersed can be obtained by compression molding the modified metal particles to form the first metal portion comprising a porous body, and then impregnating a molten metal obtained by melting the metal which forms the second metal portion in the above-mentioned porous body.
  • the metal which is difficult to provide modified metal particles by an electrolytic process can easily disperse the carbon nanotubes.
  • the carbon nanotubes can also be easily dispersed in the metal by hot compression molding of modified metal particles comprising the metal which forms the first metal portion and metal particles comprising the metal which forms the second metal portion.
  • modified metal particles there can be suitably used the modified metal particles obtained by the above-described electrolytic process or oxidation-reduction process.
  • FIG. 1 is a schematic view for illustrating one example of a composite metal article relating to the present invention.
  • FIG. 2 is a schematic view for illustrating one example of a modified metal particle according used in the present invention.
  • FIG. 3 is a schematic view for illustrating another example of a modified metal particle used in the present invention.
  • FIG. 4 is a schematic view for illustrating a porous body obtained by compression molding modified metal particles.
  • FIG. 5 is an electron micrograph showing one example of a composite metal article relating to the present invention.
  • FIG. 6 is an electron micrograph showing one example of a modified metal particle used in the present invention.
  • FIG. 7 is an electron micrograph with respect to a cross section of a composite metal article obtained by using the modified metal particle shown in FIG. 6 .
  • FIG. 8 is an electron micrograph with respect to a fractured surface of the composite metal article shown in FIG. 7 .
  • FIG. 9 is an electron micrograph with respect to a cross section of another metal article obtained by using the modified metal particle shown in FIG. 6 .
  • FIG. 10 is an electron micrograph with respect to a fractured surface of the composite metal article shown in FIG. 9 .
  • FIG. 11 shows an electron micrograph of conventional modified metal particles.
  • FIG. 1 An outline of one example of a composite metal article relating to the present invention is shown in FIG. 1 .
  • a composite metal article 10 shown in FIG. 1 comprises a first metal portion comprising a porous body formed by compression molding metal particles comprising a metal 12 to a specified form, and a second metal portion comprising a metal 14 which goes into pores of this porous body.
  • carbon nanotubes 16 , 16 •• are dispersed in the porous body which forms the first metal portion comprising the metal 12 .
  • the carbon nanotubes 16 , 16 •• coagulate and are unevenly distributed in the composite metal article 10 , the physical properties such as the electric conductivity and thermal conductivity of the composite metal article 10 can not be sufficiently improved by mixing of the carbon nanotubes 16 , 16 ••.
  • the modified metal particle 18 shown in FIG. 2 is one in which an outer peripheral surface of a granular metal particle 22 is modified with the carbon nanotubes 16 , 16 •• partially protruding outward.
  • the modified metal particle 20 shown in FIG. 3 is one in which an outer peripheral surface of a fibrous metal particle 24 is modified with the carbon nanotubes 16 , 16 •• partially protruding outward.
  • Such modified metal particles 18 and 20 shown in FIGS. 2 and 3 can each be used alone, or both may be used together.
  • each of the carbon nanotubes 16 , 16 •• are partially embedded in the metal particle 22 or the metal fiber 24 , and the remainder protrudes outward from the metal particle 22 or the metal fiber 24 .
  • each base side is embedded in the metal particle 22 or the metal fiber 24 and a tip side protrudes, or in a state where both end sides thereof are embedded in the metal particle 22 or the metal fiber 24 and an intermediate portion is exposed, or in a state where both states coexist.
  • the carbon nanotube 16 used in such modified metal particles 18 and 20 may be either a monolayer or a multilayer, and one end or both ends thereof may be closed with a fullerene-like cap or cups.
  • the carbon nanotube 16 has a tubular form in which the length thereof is 100 times or more the diameter.
  • this carbon nanotube 16 it is preferred to use one having a diameter of several nanometers to several hundred nanometers (for example, 300 nm) or less.
  • the electric conductivity decreases in some cases.
  • the carbon nanotube 16 having a diameter of 15 nm or more shows the electric conductivity, even when the chiral index is other than the above-mentioned conditions.
  • Such a carbon nanotube 16 has no anisotropy in electric conductivity like graphite, and the current flows in all directions on a surface.
  • the carbon nanotubes 16 come into contact with each other or with other metal particles at surface layer planes thereof. Accordingly, what is necessary is just to be one in which at least an outermost layer (contact layer) of the metal particle 22 or metal fiber 24 is modified with the carbon nanotubes 16 .
  • the metal particle 22 or metal fiber 24 modified with the carbon nanotubes 16 may be one comprising a metal easily modified with the carbon nanotubes 16 , for example, copper.
  • the shape of the metal particle 22 may be aspherical or flaky, as well as spherical, and is not limited.
  • Each of the modified metal particles 18 and 20 shown in FIG. 2 and FIG. 3 can be obtained by applying the current between a cathode and an anode inserted in an electrolytic solution in which the carbon nanotubes 16 , 16 •• have been dispersed, thereby conduct electrolysis, and electrolytically depositing metal particles (metal powder) containing the modified metal particles 18 and 20 , on a surface of the cathode.
  • modified metal particles 18 and 20 can be easily obtained, when there are used the modified metal particles 18 and 20 comprising a metal which is easily deposited by an electrolytic method, for example, copper.
  • modified metal particles 18 and 20 comprising copper
  • At least one of the granular modified metal particle 18 , 18 •• and the fibrous modified metal particle 20 , 20 •• obtained by the electrolytic method are compression molded to obtain the porous body.
  • This porous body may be further baked as needed.
  • the carbon nanotubes 16 , 16 •• are also partially embedded in the metal particle 22 or the metal fiber 24 . Accordingly, even when the force of compression molding or the like is applied, separation between the metal particle 22 or the metal fiber 24 and the carbon nanotubes 16 , 16 •• can be prevented.
  • FIG. 4 An outline of the porous body 30 obtained by compression molding the modified metal particles 18 , 18 •• shown in FIG. 2 is shown in FIG. 4 .
  • the modified metal particles 18 , 18 •• come into contact with one another, and pores 32 , 32 •• are formed among the modified metal particles 18 , 18 ••.
  • the carbon nanotubes 16 , 16 •• are entangled with one another, and go into this pore 32 .
  • the porous body 30 having an internal structure shown in FIG. 4 is immersed in a molten metal obtained by melting a metal different from the metal which forms the granular modified metal particle 18 , and the molten metal is impregnated in the pores 32 , 32 •• in the porous body 30 .
  • the porous body 30 is immersed in the molten metal while aspirating under vacuum or pressurizing, thereby forcedly impregnating the molten metal in the porous body 30 .
  • the porous body 30 impregnated with the molten metal is taken out of the molten metal and cooled, thereby being able to obtain the composite metal article 10 shown in FIG. 1 .
  • the second metal portion comprising the metal 14 of the composite metal article 10 shown in FIG. 1 is one formed by cooling the molten metal filled in each of the pores 32 , 32 •• of the porous body 30 , the first metal portion.
  • the carbon nanotubes 16 , 16 •• are entangled with one another, and go into each of such pores 32 , 32 ••, and the carbon nanotubes 16 , 16 •• are also dispersed in the second metal portion comprising the metal 14 .
  • the porous body 30 which is the first metal portion is formed, using the metal particles 22 comprising copper which easily forms the modified metal particles 18 , by the modified metal particles 18 in which the outer peripheral surfaces of the metal particles 22 are modified with the carbon nanotubes 16 , 16 ••, and then molten aluminum is impregnated in the porous body 30 , thereby being able to obtain the composite metal article 10 in which the first metal portion comprising copper as the metal 12 and the second metal portion comprising aluminum as the metal 14 are formed at random, and the carbon nanotubes 16 , 16 •• are dispersed in the first metal portion.
  • the porous body 30 as the first metal portion shown in FIG. 4 is one obtained by compression molding the granular modified metal particles 18 , 18 . However, it can also be obtained by compression molding the fibrous modified metal particles 20 , 20 ••.
  • the production method of the composite metal article 10 shown in FIG. 1 there has hitherto been described the production method of impregnating the porous body 30 which forms the first metal portion obtained by compression molding the granular or fibrous modified metal particles 18 or 20 in which the metal particles 22 or metal fibers 24 comprising the metal 12 are modified with the carbon nanotubes 16 , 16 ••, with the molten metal obtained by melting the metal 14 which forms the second metal portion.
  • it can also be obtained by adding at least one of the granular modified metal particle 18 and fibrous modified metal particle 20 which form the first metal portion to the molten metal obtained by melting the metal 14 which forms the second metal portion, followed by kneading.
  • At least one of the granular modified metal particle 18 and the fibrous modified metal particle 20 comprising the metal 12 which forms the first metal portion are mixed with the metal particle comprising the metal 14 which forms the second metal portion, and then, compression molded to a formed article of a specified form, which is heated to melt the metal particles comprising the metal 14 , thereby also being able to obtain the composite metal article 10 shown in FIG. 1 .
  • the melting point of the metal 14 is preferably lower than that of the metal 12 which forms the modified metal particles 18 and 20 .
  • they can be obtained by scattering the carbon nanotubes 16 , 16 •• in a nonoxidative atmosphere, and granulating or fibrillating and injecting the molten metal into this nonoxidative atmosphere with a piezoelectric pump, thereby adhering and fixing the carbon nanotubes 16 to the surfaces of the metal particles 22 or the metal fibers 24 .
  • they can also be formed by crushing, granulating or fibrillating the molten metal in which the carbon nanotubes 16 , 16 •• are dispersed by kneading.
  • the granular modified metal particles 18 or the fibrous modified metal particles 20 can also be obtained by an oxidation-reduction process of forming composite particles which contain the carbon nanotubes 16 , 16 and comprise a metal salt or metal oxide slightly soluble in water, and then, reducing deposited composite particles with a reducing agent which reduces the above-mentioned metal salt or metal oxide.
  • the granular modified metal particles 18 or the fibrous modified metal particles 20 can be obtained by dissolving a water-soluble metal salt in an aqueous solution in which the carbon nanotubes 16 , 16 •• have been dispersed, thereafter, adding to the aqueous solution an alkali which reacts with a metal ion dissolved in this aqueous solution to produce a metal salt or metal oxide slightly soluble in water, while dispersing the carbon nanotubes 16 , 16 , thereby depositing composite particles which contain the carbon nanotubes 16 , 16 •• and comprise the metal salt or metal oxide slightly soluble in water, and then, reducing the deposited composite particles with a reducing agent which reduces the metal salt or metal oxide.
  • dispersion of the carbon nanotubes 16 , 16 can also be performed by giving a shock to the aqueous solution by an ultrasonic wave, or by adding a dispersing agent with stirring the aqueous solution by mechanical stirring according to a stirrer or the like.
  • This dispersing agent may be any, as long as it is a surfactant which can disperse the carbon nanotubes 16 , 16 ••.
  • the surfactants include octylphenoxypolyethoxyethanol, sodium dodecylsulfate and polyacrylic acid.
  • water-soluble metal salt there can be suitably used a water-soluble metal salt comprising copper, nickel or silver, and more preferably, there can be used a sulfate, a nitrate, or an acetate comprising copper, nickel or silver.
  • the fine composite particles comprising the metal salt or metal oxide slightly soluble in water which has been thus obtained, are substantially spherical, and composite particles containing the carbon nanotubes 16 , 16 •• having a particle size of 1 ⁇ m or less.
  • such composite particles are formed in the aqueous solution in which the carbon nanotubes 16 , 16 •• are dispersed
  • the carbon nanotubes 16 , 16 •• dispersed in the aqueous solution can be taken in the composite particles in the course of forming the composite particles, and the carbon nanotubes 16 , 16 •• are contained in the formed composite particles in a uniformly dispersed state.
  • the resulting composite particles are reduced with the reducing agent which reduces the metal salt or metal oxide slightly soluble in water, thereby being able to obtain the granular modified metal particles 18 or the fibrous modified metal particles 20 .
  • a reducing agent there can be used one or two or more kinds of the group consisting of hydrazine, a hydrazine compound, formalin, acetaldehyde, formic acid, rochelle salt, hydroxylamine, glucose and hydrogen peroxide.
  • This reducing agent may be added to the aqueous solution in which the composite particles comprising the metal salt or the metal oxide are precipitated, or may be brought into direct contact with the composite particles comprising the metal salt or the metal oxide, which has been separated from the aqueous solution, thereby reducing the metal salt or the metal oxide
  • an antifoaming agent such as an alcohol may be added.
  • At least one of the granular modified metal particle 18 and the fibrous modified metal particle 20 comprising the metal 12 which forms the first metal portion is mixed with the metal particle comprising the metal 14 which forms the second metal portion, and then, compression molded, thereby being able to obtain the composite metal article 10 shown in FIG. 1 .
  • baking may be performed after the compression molding as needed.
  • the metal 12 which forms the modified metal particles 18 and 20 may be removed by chemically dissolving or melting it to form the composite metal article with the carbon nanotubes 16 , 16 •• dispersed in the metal 14
  • the composite metal article from which the metal 12 has been removed may be impregnated with a molten metal comprising the metal 14 , or may be impregnated with a molten metal comprising another kind of metal.
  • the composite metal article of the invention may be a composite metal article in which spaces among the second metal portions comprising the metal 14 are filled with the first metal portions comprising the metal 12 with the carbon nanotubes 16 , 16 dispersed.
  • Such a composite metal article can be obtained by mixing the metal particle comprising the metal 14 with at least one of the granular modified metal particle 18 and the fibrous modified metal particle 20 , and performing hot compression molding.
  • the metal particle comprising the metal 14 are mixed with at least one of the granular modified metal particle 18 and the fibrous modified metal particle 20 , compression molding is performed, and baking may be further performed.
  • An electric current is passed between a cathode and an anode inserted in an electrolytic solution in which carbon nanotubes 16 , 16 •• having a diameter of 200 nm are dispersed to conduct electrolysis, thereby electrolytically depositing copper particles on a surface of the cathode.
  • modified metal particles 18 modified with the carbon nanotubes 16 , 16 •• which partially protrude outward from the copper particles 22 , as shown in FIG. 2 .
  • the metal particles comprising the modified metal particles 18 are compression molded to obtain a formed article of a specified form.
  • a cross section of this formed article was observed under a microscope, it was a porous body in which a number of pores were formed, as shown in FIG. 4 .
  • the resulting formed article was immersed in molten aluminum maintained at 750° C. for about 1 hour while aspirating under vacuum, thereby forcedly impregnating the molten metal in the formed article.
  • the formed article taken out of molten aluminum was cooled to obtain a composite metal article comprising copper, aluminum and the carbon nanotubes.
  • a cross section of this composite metal article was observed under a microscope, second metal portions comprising aluminum were randomly formed in a first metal portion comprising the porous body formed by copper, as shown in FIG. 1 .
  • the alkali solution was added to the resulting dispersion while stirring by giving an ultrasonic wave with an ultrasonic washing machine [US-1 manufactured by As One Co., Ltd.] and with a glass rod.
  • the dispersion became a deposition solution in which composite particles were deposited.
  • the resulting composite particles were nickel colored, nickel metal particles containing 5% by weight of the carbon nanotubes, and granular modified metal particles in which one end portion of the carbon nanotube protruded outward from the granular metal particle, as indicated by arrows in FIG. 6 .
  • the mixture was kept at a temperature of 500° C. for 1 hour while pressurizing it, and molded to a specified form.
  • the amount of this atomized copper powder mixed was adjusted so that the atomized copper powder in a baked article became 60% by weight.
  • the resulting baked article was one in which a first metal portion comprising nickel filled as a binder around a second metal portion comprising the atomized copper powder, as shown in a micrograph of a cross section of FIG. 7 .
  • Example 2 After the modified metal particles obtained in Example 2, which comprise the carbon nanotubes and nickel, were mixed with a tungsten powder, the mixture was kept at a temperature of 500° C. for 2 hours while pressurizing it, thereby performing baking. The amount of this tungsten powder mixed was adjusted so that the tungsten powder in a baked article became 55% by volume.
  • the resulting baked article was one in which a first metal portion comprising nickel filled as a binder around a second metal portion comprising the tungsten powder, as shown in a micrograph of a cross section of FIG. 9 .
  • carbon nanotubes when there is produced a composite metal article formed by at least two kinds of metals, wherein a first metal portion comprising one side of the above-mentioned two kinds of metals and a second metal portion comprising the other side of the above-mentioned two kinds of metals are formed at random, carbon nanotubes can be mixed in at least one side of the first metal portion and second metal portion without separation of the carbon nanotubes during the production process of the composite metal, by using modified metal particles which are metal particles comprising at least one metal of the two kinds of metals and modified with the carbon nanotubes which partially protrude outward from the metal particles.
  • first metal portion and second metal portion are formed at random in the composite metal article, so that according to the present invention which can mix the carbon nanotubes in at least one side of such first metal portion and second metal portion, there can be obtained the composite metal article in which the carbon nanotubes are dispersed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Electrolytic Production Of Metals (AREA)
US10/591,941 2004-10-21 2005-10-07 Composite metal article and production method thereof Abandoned US20070190348A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004-307078 2004-10-21
JP2004307078 2004-10-21
PCT/JP2005/018606 WO2006043431A1 (ja) 2004-10-21 2005-10-07 複合金属体及びその製造方法

Publications (1)

Publication Number Publication Date
US20070190348A1 true US20070190348A1 (en) 2007-08-16

Family

ID=36202849

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/591,941 Abandoned US20070190348A1 (en) 2004-10-21 2005-10-07 Composite metal article and production method thereof

Country Status (5)

Country Link
US (1) US20070190348A1 (de)
EP (1) EP1806417A1 (de)
JP (1) JP4390807B2 (de)
CN (1) CN1934281A (de)
WO (1) WO2006043431A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070110977A1 (en) * 2005-08-29 2007-05-17 Al-Haik Marwan S Methods for processing multifunctional, radiation tolerant nanotube-polymer structure composites
US20080093577A1 (en) * 2006-06-21 2008-04-24 Khraishi Tariq A Metal-carbon nanotube composites for enhanced thermal conductivity for demanding or critical applications
US7514063B1 (en) * 2008-02-08 2009-04-07 International Business Machines Corporation Method for the purification of semiconducting single walled carbon nanotubes
US20100327233A1 (en) * 2009-06-24 2010-12-30 Shugart Jason V Copper-Carbon Composition
US8541336B2 (en) * 2010-02-04 2013-09-24 Third Millennium Metals, Llc Metal-carbon compositions
RU2508961C2 (ru) * 2012-05-22 2014-03-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ульяновский государственный технический университет" Способ получения объемных сложнопрофильных наноструктурных конструкционных и функциональных материалов
US9273380B2 (en) 2011-03-04 2016-03-01 Third Millennium Materials, Llc Aluminum-carbon compositions
EP3029686A4 (de) * 2013-08-01 2017-03-22 Sekisui Chemical Co., Ltd. Leitfähiger füllstoff, verfahren zur herstellung davon, leitfähige paste und verfahren zur herstellung der leitfähigen paste
US20190093260A1 (en) * 2016-04-22 2019-03-28 Chakyu Dyeing Co., Ltd. Electrically conductive yarn
WO2019243866A1 (en) * 2017-09-26 2019-12-26 Norse Biotech As Metal composites

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4526550B2 (ja) * 2006-05-12 2010-08-18 学校法人千葉工業大学 カーボンナノ材と金属材料との複合体の製造方法
KR100956505B1 (ko) 2009-02-05 2010-05-07 주식회사 엘지화학 탄소계 입자／구리로 된 복합재료의 제조방법
EP2511393A1 (de) * 2011-04-11 2012-10-17 Siemens Aktiengesellschaft Matrix mit Nanotubes
JP5853311B2 (ja) * 2011-10-31 2016-02-09 株式会社Ｊｏｌｅｄ 表示装置及び表示装置の製造方法
WO2016013219A1 (ja) * 2014-07-23 2016-01-28 日本ゼオン株式会社 めっき液およびその製造方法、並びに、複合材料、銅複合材料およびその製造方法
CN108866369B (zh) * 2017-05-08 2020-03-17 清华大学 三维多孔复合材料
DE102018116559B4 (de) * 2018-07-09 2023-02-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines Werkstoffverbundes, einen Werkstoffverbund sowie eine Verwendung des Werkstoffverbundes als Wärmeleiter sowie -überträger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023961A (en) * 1974-04-11 1977-05-17 Plessey Incorporated Method of producing powdered materials
US6132487A (en) * 1998-11-11 2000-10-17 Nikko Materials Company, Limited Mixed powder for powder metallurgy, sintered compact of powder metallurgy, and methods for the manufacturing thereof
US6250984B1 (en) * 1999-01-25 2001-06-26 Agere Systems Guardian Corp. Article comprising enhanced nanotube emitter structure and process for fabricating article

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4272875B2 (ja) * 2002-11-28 2009-06-03 シナノケンシ株式会社 電気接点部材
US20060065543A1 (en) * 2003-02-18 2006-03-30 Susumu Arai Metal particles and method for producing same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023961A (en) * 1974-04-11 1977-05-17 Plessey Incorporated Method of producing powdered materials
US6132487A (en) * 1998-11-11 2000-10-17 Nikko Materials Company, Limited Mixed powder for powder metallurgy, sintered compact of powder metallurgy, and methods for the manufacturing thereof
US6250984B1 (en) * 1999-01-25 2001-06-26 Agere Systems Guardian Corp. Article comprising enhanced nanotube emitter structure and process for fabricating article

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070110977A1 (en) * 2005-08-29 2007-05-17 Al-Haik Marwan S Methods for processing multifunctional, radiation tolerant nanotube-polymer structure composites
US20080093577A1 (en) * 2006-06-21 2008-04-24 Khraishi Tariq A Metal-carbon nanotube composites for enhanced thermal conductivity for demanding or critical applications
US7998367B2 (en) * 2006-06-21 2011-08-16 Stc.Unm Metal-carbon nanotube composites for enhanced thermal conductivity for demanding or critical applications
US7514063B1 (en) * 2008-02-08 2009-04-07 International Business Machines Corporation Method for the purification of semiconducting single walled carbon nanotubes
US20100327233A1 (en) * 2009-06-24 2010-12-30 Shugart Jason V Copper-Carbon Composition
US8647534B2 (en) 2009-06-24 2014-02-11 Third Millennium Materials, Llc Copper-carbon composition
US8551905B2 (en) * 2010-02-04 2013-10-08 Third Millennium Metals, Llc Metal-carbon compositions
US8546292B2 (en) * 2010-02-04 2013-10-01 Third Millennium Metals, Llc Metal-carbon compositions
US8541335B2 (en) * 2010-02-04 2013-09-24 Third Millennium Metals, Llc Metal-carbon compositions
US8541336B2 (en) * 2010-02-04 2013-09-24 Third Millennium Metals, Llc Metal-carbon compositions
US9273380B2 (en) 2011-03-04 2016-03-01 Third Millennium Materials, Llc Aluminum-carbon compositions
RU2508961C2 (ru) * 2012-05-22 2014-03-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ульяновский государственный технический университет" Способ получения объемных сложнопрофильных наноструктурных конструкционных и функциональных материалов
EP3029686A4 (de) * 2013-08-01 2017-03-22 Sekisui Chemical Co., Ltd. Leitfähiger füllstoff, verfahren zur herstellung davon, leitfähige paste und verfahren zur herstellung der leitfähigen paste
US10533098B2 (en) * 2013-08-01 2020-01-14 Sekisui Chemical Co., Ltd. Conductive filler, method for producing same, conductive paste and method for producing conductive paste
US20190093260A1 (en) * 2016-04-22 2019-03-28 Chakyu Dyeing Co., Ltd. Electrically conductive yarn
WO2019243866A1 (en) * 2017-09-26 2019-12-26 Norse Biotech As Metal composites
US11767580B2 (en) * 2017-09-26 2023-09-26 Norse Biotech As Metal composites

Also Published As

Publication number Publication date
WO2006043431A1 (ja) 2006-04-27
EP1806417A1 (de) 2007-07-11
JP4390807B2 (ja) 2009-12-24
JPWO2006043431A1 (ja) 2008-05-22
CN1934281A (zh) 2007-03-21

Similar Documents

Publication Publication Date Title
US20070190348A1 (en) Composite metal article and production method thereof
US20070196641A1 (en) Production method of composite particles
EP2261398A1 (de) Metallschäume
CN107012349B (zh) 一种碳纳米管增强泡沫铝基复合材料的制备方法
JP2012516386A (ja) ナノ構造マイクロ多孔質複合発泡体の調製
CN101258269A (zh) 纳米碳/铝复合材料、生产该材料的方法和用于所述方法的镀覆液
US20110318504A1 (en) Method for fabricating composite material comprising nano carbon and metal or ceramic
JP4421556B2 (ja) 金属粒子およびその製造方法
Daoush Processing and characterization of CNT/Cu nanocomposites by powder technology
JP2004076031A (ja) 電解めっき用めっき浴及び複合めっき用めっき浴並びにこれらの製造方法
JP2006057129A (ja) 複合金属体およびその製造方法ならびに金属粒子およびその製造方法
KR101811994B1 (ko) 전자파 차폐용 금속도금 유리섬유 강화 열가소성 수지 펠릿 및 그 제조방법
US20040055420A1 (en) Method for enhancing surface area of bulk metals
CN105209660A (zh) 涂覆碳纳米材料的方法
JPH06306672A (ja) 複合材料強化材、その製造方法及び複合材料
JP4816516B2 (ja) ロッド状酸化亜鉛の製造方法、ロッド状酸化亜鉛及び樹脂複合材
Kang et al. Gold/mesoporous silica-fiber core-shell hybrid nanostructure: a potential electron transfer mediator in a bio-electrochemical system
JP2007247056A (ja) 複合粒子、これを用いた複合材および複合粒子の製造方法
RU2325472C2 (ru) Способ получения металлического порошка
CN101024734A (zh) 复合粒子,包含复合粒子的复合材料和它的制造方法
JP2004263242A (ja) メソポーラス金属の製造方法
Lee et al. A study on Cu particles coated with nano-silver by a replacement reaction between silver nitrate and copper particles
KR20140074046A (ko) 분산성이 우수한 금속-탄소 복합재 제조 방법
BR102014005494A2 (pt) processo para síntese de partículas ocas metálicas nanoestruturadas na qual o metal é depositado sobre máscaras de sacrifícios pelo método de deposição autocatalítica sem potencial externo, partículas ocas metálicas nanoestruturadas, material particulado e uso do material particulado
KR101115308B1 (ko) 리퀴드 메탈 와이어 및 이의 제조방법

Legal Events

Date Code Title Description
AS Assignment

Owner name: SHINANO KENSHI KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ICHIKI, KOUICHI;REEL/FRAME:018304/0055

Effective date: 20060705

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION