WO1991001387A1 - A process of manufacturing particle reinforced metal foam and product thereof - Google Patents

A process of manufacturing particle reinforced metal foam and product thereof Download PDF

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Publication number
WO1991001387A1
WO1991001387A1 PCT/NO1990/000115 NO9000115W WO9101387A1 WO 1991001387 A1 WO1991001387 A1 WO 1991001387A1 NO 9000115 W NO9000115 W NO 9000115W WO 9101387 A1 WO9101387 A1 WO 9101387A1
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WO
WIPO (PCT)
Prior art keywords
metal
foam
gas
melt
metal foam
Prior art date
Application number
PCT/NO1990/000115
Other languages
French (fr)
Inventor
Wolfgang Walter Ruch
Bjørn KIRKEVÅG
Original Assignee
Norsk Hydro A.S
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
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Application filed by Norsk Hydro A.S filed Critical Norsk Hydro A.S
Priority to SU905011037A priority Critical patent/RU2046151C1/en
Priority to DE199090910522T priority patent/DE483184T1/en
Priority to BR909007549A priority patent/BR9007549A/en
Priority to KR1019920700095A priority patent/KR100186782B1/en
Priority to DE90910522T priority patent/DE69006359T2/en
Priority to AT90910522T priority patent/ATE100867T1/en
Publication of WO1991001387A1 publication Critical patent/WO1991001387A1/en

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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
    • C22C1/08—Alloys with open or closed pores
    • 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
    • C22C1/08—Alloys with open or closed pores
    • C22C1/083—Foaming process in molten metal other than by powder metallurgy

Definitions

  • a process of manufacturing particle reinforced metal foam and product thereof A process of manufacturing particle reinforced metal foam and product thereof
  • the present invention relates to a process of providing met foam and more particularly to a process resulting in provisi of thin wall close cell particle reinforced metal foam.
  • foams There are several ways to produce foams. Different foaming tech niques are known such as incorporating hydrides in the molte metal or adding organic compounds which release gases on heat ing. Vapor deposition on polymeric substrates or casting o metal around granules which are then leached out leaving porous metal structure are other examples of providing metal with cellular structure.
  • foams or ation using blowing agents are affecte by the surface tension and viscosity of the actual melt. Th viscosity counteracts bursting of the cell walls during a pro gressive increase in the volume of the formed bubbles, while low surface tension will favour formation of thin bubble walls.
  • the properties of foams being gas-in-solid dispersions are largely determined by their density, but the cell size, struc ⁇ ture and their distribution are also important parameters in- fluencing the properties.
  • foamed metals are produced by adding a gas evolving compound to the molten metal followed by heating of the resultant mixture to decompose the compound and to produce ex ⁇ panding cellulating gases.
  • the foaming compound is usually metal hydride such as TiH 2 or ZrH 2 , and after the foaming step the mould is cooled to form a solid foam material. Cells of non- uniform structure and/or undesirably large size are experienced due to the difficulties with uniform distribution of the evolv ⁇ ing gas through the whole volume of the foamed metal.
  • GB patent No. 1.287.994 discloses a process for preparation of metal foams applying a viscosity increasing agent comprising an inert gas or an oxygen containing material gaseous at the melt conditions and treating the thus produced viscous melt with a foaming agent.
  • Air, nitrogen, carbon dioxide, argon and water are preferably used in the process as viscosity increasing agents in amounts from 1 to 6 grams per 100 grams of metal alloy.
  • Metal hydrides are used as foaming agents (hafnium, titanium or zirconium hydrides) in amounts of from 0,5 to 1,0 grams per 100 grams of alloy.
  • the increase in viscosity is enhanced by the presence of a promoter metal, e.g. from 4 to 7 weight% magnesium is used in aluminium alloys.
  • a promoter metal e.g. from 4 to 7 weight% magnesium is used in aluminium alloys.
  • a good mixing technique is required, the addition of foaming agents is usually carried out at a tempera ⁇ ture lower than addition of the viscosity increasing agent in a separate second vessel.
  • the disclosed batchwise process, achiev ⁇ ing better foams with regard to uniform size and distribution of the cells, and claiming a certain reduction in the consumption of foaming agents, is a rather complicated time consuming and expensive process requiring several process steps and uni based on use of expensive heat decomposible gas evolving co pounds (hydrides) .
  • European patent application No. 0 210 803 discloses a simil batchwise method of producing foamed metals based on use of fr 0,2 to 8,0 weight% metallic calcium as viscosity adjusting age and titanium hydride in amounts of from 1 to 3 weight% of t molten melt as foaming agent.
  • Still another method of producing cellularized metal by decompo sition of a heat-decomposable gas evolving compound in molte metal is disclosed in US patent No. 3.297.431.
  • the improvemen comprises addition of an intimately dispersed, finely divide powder to the metal prior to decomposition of the gas evolvin compound (carbonates or hydrides) , or dissolving of gas in th melt.
  • the stabilizing powders may be metals or non-metals elements or compounds, and two wettable powders are preferen tially used where one of which forms a solid alloy with th metal.
  • the gas is dissolved at one pressure and the evolved at a second lower pressure.
  • a drawback in common for the hitherto known processes is tha all of them are batchwise operating processes using either ex pensive gas evolving compounds or dissolved gases as cellulatin means and viscosity increasing or stabilizing additives t achieve quality metal foams.
  • Another object of the invention is to provide a method for up ⁇ grading of scrap metal material.
  • Still another object of the invention is to provide a novel type of particle reinforced metal foam having improved mechanical properties.
  • Fig. 1 shows schematically in the form of a flow-sheet the process of preparation of metal foam accord ⁇ ing to the invention.
  • Fig. 2 displays a natural size contact print of the foamed metal sample prepared according to the invention
  • Fig. 3 shows an optical metallograph picture of the closed cell Al-foam structure.
  • Fig. 4 illustrates graphically results from a compres ⁇ sion test conducted on foam samples.
  • a metal foam of the closed cell type structure having a uniform density and cell structure can be provided simply by feeding of finely dispersed cellulating gas into a molten particle reinforced metal matri composite material (PMMC) .
  • PMMC metal matri composite material
  • No special additives adjusting th viscosity of the melt or particular precautions with regard t the distribution of the cellulating gas bubbles through the mel were required.
  • the gas bubbles rise to the top of the melt an form foam gradually increasing in volume.
  • No tendency to burst ing of the foam cells when they reach the melt surface was ob served. This indicates a (highly) stabilized surface of the ga bubbles.
  • the upper portion of the foam cake solidifies and ca be easily removed.
  • Fig. 2 shows in natural size a photographic picture of th resultant foam sample removed as the solidified top part of th foam cake.
  • the cross-section of the sample exhibits a unifor distribution of cells having a diameter in the range of from to 5 mm.
  • the density of the sample was measured to 0,2 g/cm 3 .
  • the achieved pores (cells) are essentially spherical and closed providing the foamed metal with isotropic properties in all directions, especially with regard to energy adsorption.
  • Metallographic examination of the structure on the samples achieved from Example 1 reveals an extremely thin walled foam structure, as illustrated in Fig. 3.
  • the wall thickness in this metallograph picture, magnification of 20, is in order of the reinforcing SiC particle size approximately 12 7 um.
  • Fig. 4 The mechanical behaviour of the produced foam is represented in Fig. 4 illustrating the results from the testing of compressive stress conducted on the samples from Example 1.
  • the achieved flat stress/strain curve from the samples having an initial height of 26 mm applying a crosshead velocity of 2 mm/min. is typical for this type of material as long as the cell structure did not collapse completely.
  • the energy absorption of this foam was determined to be 2 kJ/1 foam, which is a very favourable value compared to the values reported in literature for commer ⁇ cially provided Al-foams.
  • the achieved improved mechanical properties of the resultant foams are a result of a beneficial influence from the reinforcing particles incorporated in the cell walls.
  • a a cellulating gas e.g. N 2 , Ar, C0 2 , He and even pressurized air which is normally easily available at low costs.
  • the biggest potential of the presen invention is an up-grading of low grade composite scra material.
  • This constantly increasing volume of composite scra today represents a considerable problem since it can not simpl be remelted or incorporated to the recycled secondary aluminium.

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  • 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)
  • Laminated Bodies (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Particle reinforced low cost metal foam is provided by a process of manufacturing metal foam based on foaming of molten composite material using finely dispersed cellulating gas.

Description

A process of manufacturing particle reinforced metal foam and product thereof
The present invention relates to a process of providing met foam and more particularly to a process resulting in provisi of thin wall close cell particle reinforced metal foam.
Foamed metals, as well as foamed ceramics and plastics, due their unique combination of properties and light weight a earning growing attention as engineering materials.
There are several ways to produce foams. Different foaming tech niques are known such as incorporating hydrides in the molte metal or adding organic compounds which release gases on heat ing. Vapor deposition on polymeric substrates or casting o metal around granules which are then leached out leaving porous metal structure are other examples of providing metal with cellular structure.
The process of foam or ation using blowing agents is affecte by the surface tension and viscosity of the actual melt. Th viscosity counteracts bursting of the cell walls during a pro gressive increase in the volume of the formed bubbles, while low surface tension will favour formation of thin bubble walls. The properties of foams being gas-in-solid dispersions are largely determined by their density, but the cell size, struc¬ ture and their distribution are also important parameters in- fluencing the properties.
In general such foamed metals are produced by adding a gas evolving compound to the molten metal followed by heating of the resultant mixture to decompose the compound and to produce ex¬ panding cellulating gases. The foaming compound is usually metal hydride such as TiH2 or ZrH2, and after the foaming step the mould is cooled to form a solid foam material. Cells of non- uniform structure and/or undesirably large size are experienced due to the difficulties with uniform distribution of the evolv¬ ing gas through the whole volume of the foamed metal.
GB patent No. 1.287.994 discloses a process for preparation of metal foams applying a viscosity increasing agent comprising an inert gas or an oxygen containing material gaseous at the melt conditions and treating the thus produced viscous melt with a foaming agent. Air, nitrogen, carbon dioxide, argon and water are preferably used in the process as viscosity increasing agents in amounts from 1 to 6 grams per 100 grams of metal alloy. Metal hydrides are used as foaming agents (hafnium, titanium or zirconium hydrides) in amounts of from 0,5 to 1,0 grams per 100 grams of alloy.
Preferably the increase in viscosity is enhanced by the presence of a promoter metal, e.g. from 4 to 7 weight% magnesium is used in aluminium alloys. A good mixing technique is required, the addition of foaming agents is usually carried out at a tempera¬ ture lower than addition of the viscosity increasing agent in a separate second vessel. The disclosed batchwise process, achiev¬ ing better foams with regard to uniform size and distribution of the cells, and claiming a certain reduction in the consumption of foaming agents, is a rather complicated time consuming and expensive process requiring several process steps and uni based on use of expensive heat decomposible gas evolving co pounds (hydrides) .
European patent application No. 0 210 803 discloses a simil batchwise method of producing foamed metals based on use of fr 0,2 to 8,0 weight% metallic calcium as viscosity adjusting age and titanium hydride in amounts of from 1 to 3 weight% of t molten melt as foaming agent.
Still another method of producing cellularized metal by decompo sition of a heat-decomposable gas evolving compound in molte metal is disclosed in US patent No. 3.297.431. The improvemen comprises addition of an intimately dispersed, finely divide powder to the metal prior to decomposition of the gas evolvin compound (carbonates or hydrides) , or dissolving of gas in th melt. The stabilizing powders may be metals or non-metals elements or compounds, and two wettable powders are preferen tially used where one of which forms a solid alloy with th metal. Usually the gas is dissolved at one pressure and the evolved at a second lower pressure.
A drawback in common for the hitherto known processes is tha all of them are batchwise operating processes using either ex pensive gas evolving compounds or dissolved gases as cellulatin means and viscosity increasing or stabilizing additives t achieve quality metal foams.
Furthermore, the prior art processes require a close contro with the temperature and pressure conditions at different step of the process. Consequently, so far there is no method operat ing on an industrial scale in an economical way offering a lo cost metal foam to compete with other engineering materials. Accordingly, it is an object of this invention to provide a simple low cost method for preparation of quality foams.
Another object of the invention is to provide a method for up¬ grading of scrap metal material.
Still another object of the invention is to provide a novel type of particle reinforced metal foam having improved mechanical properties.
The invention in its various aspects will be described in details, and various other objects, advantages and additional features thereof will become more apparent from the following description and accompanying patent claims which are to be read in conjunction with the attached drawings. Fig. 1-4, where
Fig. 1 shows schematically in the form of a flow-sheet the process of preparation of metal foam accord¬ ing to the invention.
Fig. 2 displays a natural size contact print of the foamed metal sample prepared according to the invention,
Fig. 3 shows an optical metallograph picture of the closed cell Al-foam structure.
Fig. 4 illustrates graphically results from a compres¬ sion test conducted on foam samples.
Referring to Fig. 1, illustrating schematically the process of metal foam preparation, it has been found that a metal foam of the closed cell type structure having a uniform density and cell structure can be provided simply by feeding of finely dispersed cellulating gas into a molten particle reinforced metal matri composite material (PMMC) . No special additives adjusting th viscosity of the melt or particular precautions with regard t the distribution of the cellulating gas bubbles through the mel were required. The gas bubbles rise to the top of the melt an form foam gradually increasing in volume. No tendency to burst ing of the foam cells when they reach the melt surface was ob served. This indicates a (highly) stabilized surface of the ga bubbles. The upper portion of the foam cake solidifies and ca be easily removed. Even foam which is not completely solidifie can be removed whithout changing the cell structure due to th thick consistency of the formed foam. This is a quite importan feature of the method according to the present invention, whic allows to run the process continuously by transfer of semi solidified foam to the moulds. There is even a possibility o subjecting the foam at this stage to certain forming operations something which offers a flexibility with regard to the fina shape of the resultant metal foam semiproducts.
Example 1
30 kg of an eutectic aluminium alloy (Sil2MglNi2,5) was melte in an open crucible. The molten alloy kept at a temperature o 650°C was added silicon carbide particles of an average size o 12/um, and simultaneously C02 gas was finely dispersed through th melt by means of a special treatment rotor as disclosed in U patent No. 4.618.427. During the feeding of a Cθ2 surplus int the formed molten composite material bubbles started to rise t the top of the melt forming a raising foam layer. The upper por tions of the foam solidified with no sign of surface burst.
Fig. 2 shows in natural size a photographic picture of th resultant foam sample removed as the solidified top part of th foam cake. The cross-section of the sample exhibits a unifor distribution of cells having a diameter in the range of from to 5 mm. The density of the sample was measured to 0,2 g/cm3. Example 2
20 kg of scrap PMMC material (A1203 reinforced Al-alloy) was re- melted in an open crucible. Pressurized air was applied as source of cellulating gas in this case, finely dispersed and distributed as described in Example 1.
Also in this case the resulting bubbles gave rise to a foamed structure when they reached the top of the melt in the crucible and were allowed to cool.
The achieved pores (cells) are essentially spherical and closed providing the foamed metal with isotropic properties in all directions, especially with regard to energy adsorption. Metallographic examination of the structure on the samples achieved from Example 1 reveals an extremely thin walled foam structure, as illustrated in Fig. 3. The wall thickness in this metallograph picture, magnification of 20, is in order of the reinforcing SiC particle size approximately 127um.
The mechanical behaviour of the produced foam is represented in Fig. 4 illustrating the results from the testing of compressive stress conducted on the samples from Example 1. The achieved flat stress/strain curve from the samples having an initial height of 26 mm applying a crosshead velocity of 2 mm/min. is typical for this type of material as long as the cell structure did not collapse completely. The energy absorption of this foam was determined to be 2 kJ/1 foam, which is a very favourable value compared to the values reported in literature for commer¬ cially provided Al-foams. Obviously, the achieved improved mechanical properties of the resultant foams are a result of a beneficial influence from the reinforcing particles incorporated in the cell walls.
Evidently, the above described novel method of preparation of foamed metals according to the present invention offers several advantages both with regard to the economics of the process an the characteristics of the resulting foams.
First of all there is an opportunity to run the process con tinuously by continuous remelting or feeding of molten articl reinforced metal material using a variety of available gases a a cellulating gas, e.g. N2, Ar, C02, He and even pressurized air which is normally easily available at low costs.
There are no special requirements to temperatures, pressure o uniform distribution of gas bubbles during the foaming an solidification of the resultant foamed metal. The density and t a certain extent also the cell size are simply controlled b dispersion of the cellulating gas through the melt, preferen tially by applying the above special treatment rotor, but als other means ensuring finely dispersed bubbles can be applied The foam accumulated on the top of the melt can be directly fe into moulds for solidification in desired shapes and dimension or subjected to a certain grade of deformation/reshaping of th semisolidified foam.
Furthermore, even if it is possible to prepare the molten par ticle reinforced alloy in a separate process step using a active gas and addition of reinforcing particles prior to apply ing of the cellulating gas, the biggest potential of the presen invention is an up-grading of low grade composite scra material. This constantly increasing volume of composite scra today represents a considerable problem since it can not simpl be remelted or incorporated to the recycled secondary aluminium.

Claims

Claims
1. A process of manufacturing particle reinforced metal foam, c h a r a c t e r i z e d i n t h a t the process is a continuous process comprising steps of providing molten composite metal material, feeding of cellulating gas into the melt, foaming of the melt and accumulation of foamed metal on the top of the melt, and finally removal and solidification of the foamed metal.
2. The process according to claim 1, c h a r a c t e r i z e d i n t h a t the molten composite material is provided by re- melting of particle metal matrix composite material.
3. The process according to claim 1 , c h a r a c t e r i z e d i n t h a t the composite material is formed in situ in the vessel by adding and distribution of reinforcing particles in the molten metal or alloy by means of an active gas.
4. The process according to claim 3, c h a r a c t e r i z e d i n t h a t the active gas is C02 gas and the particles are refractory particles.
5. The process according to one or more preceding claims , c h a r a c t e r i z e d i n t h a t the molten composite material is aluminium or aluminium alloy.
- 6. The process according to claim 1, c h a r a c t e r i z e d i n t h a t *5 the cellulating gas is air.
7. A close cell particle reinforced metal foam characterized by cell wall thickness from 10 to 20/Um comprising reinforcing refractory par¬ ticles.
8. The reinforced metal foam according to claim 7, c h a r a c t e r i z e d i n t h a t the matrix metal is aluminium alloy reinforced by SiC particles.
9. The reinforced metal foam according to claim 8, c h a r a c t e r i z e d i n t h a t the foam exhibits a compressive strength of 0,2 kg/mm2 at a density of 0,2 g/cm3.
PCT/NO1990/000115 1989-07-17 1990-07-11 A process of manufacturing particle reinforced metal foam and product thereof WO1991001387A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SU905011037A RU2046151C1 (en) 1989-07-17 1990-07-11 Method of producing foamed metal
DE199090910522T DE483184T1 (en) 1989-07-17 1990-07-11 METHOD FOR PRODUCING A DISPERSION-FASTENED METAL FOAM AND METHOD FOR PRODUCING IT.
BR909007549A BR9007549A (en) 1989-07-17 1990-07-11 PRODUCTION PROCESS OF REINFORCED METALLIC FOAM WITH PARTICLE AND REINFORCED METALLIC FOAM WITH CLOSED CELL PARTICLE
KR1019920700095A KR100186782B1 (en) 1989-07-17 1990-07-11 Method for producing particle-reinforced metal foam and products thereof
DE90910522T DE69006359T2 (en) 1989-07-17 1990-07-11 METHOD FOR PRODUCING A DISPERSION-FASTENED METAL FOAM AND METHOD FOR PRODUCING IT.
AT90910522T ATE100867T1 (en) 1989-07-17 1990-07-11 PROCESS FOR THE PRODUCTION OF A DISPERSION-STRENGTHENED METAL FOAM AND PROCESS FOR ITS PRODUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO892925 1989-07-17
NO892925A NO172697C (en) 1989-07-17 1989-07-17 PROCEDURE FOR THE MANUFACTURING OF PARTICULAR REINFORCED METAL FOAM AND RESULTING PRODUCT

Publications (1)

Publication Number Publication Date
WO1991001387A1 true WO1991001387A1 (en) 1991-02-07

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Country Status (13)

Country Link
EP (1) EP0483184B1 (en)
JP (1) JP2635817B2 (en)
KR (1) KR100186782B1 (en)
AT (1) ATE100867T1 (en)
BR (1) BR9007549A (en)
CA (1) CA2064099A1 (en)
DE (2) DE69006359T2 (en)
DK (1) DK0483184T3 (en)
ES (1) ES2049037T3 (en)
HU (1) HU210524B (en)
NO (1) NO172697C (en)
RU (1) RU2046151C1 (en)
WO (1) WO1991001387A1 (en)

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WO1992021457A1 (en) * 1991-05-31 1992-12-10 Alcan International Limited Process and apparatus for producing shaped slabs of particle stabilized foamed metal
DE4233695A1 (en) * 1992-10-07 1994-04-14 Wicona Bausysteme Gmbh Fastening decorative facade plate to building - involves bolts with frusto=conical heads held in undercut blind bores in plates by spreader rings
WO1994017218A1 (en) * 1993-01-21 1994-08-04 Alcan International Limited Production of particle-stabilized metal foams
WO1994029490A1 (en) * 1993-06-04 1994-12-22 Bayerische Motoren Werke Aktiengesellschaft Method and device for manufacturing a composite component
DE19501659C1 (en) * 1995-01-20 1996-05-15 Daimler Benz Ag Method for producing component made of metal foam
WO1997011843A1 (en) * 1995-09-29 1997-04-03 Norsk Hydro Asa Building element
WO1999011832A1 (en) * 1997-08-30 1999-03-11 Honsel Ag Alloy for producing metal foamed bodies using a powder with nucleating additives
DE19813176A1 (en) * 1998-03-25 1999-09-30 Fraunhofer Ges Forschung Composite material component, especially an optionally foamable die cast metal matrix composite component, is produced
WO2000073694A1 (en) 1999-05-26 2000-12-07 Thermotite As Heat-insulated steel pipe for deep-sea pipelines and method for producing the same
US6516962B1 (en) * 1999-10-06 2003-02-11 Atecs Mannesmann Ag Telescopic boom for cranes
US6660224B2 (en) 2001-08-16 2003-12-09 National Research Council Of Canada Method of making open cell material
US6840301B2 (en) 2001-08-17 2005-01-11 Cymat Corp. Method and apparatus for low pressure aluminum foam casting
US6866084B2 (en) 2000-02-25 2005-03-15 Cymat Corporation Method and means for producing moulded foam bodies
US7108828B2 (en) 2001-08-27 2006-09-19 National Research Council Of Canada Method of making open cell material
US7175689B2 (en) 2001-06-15 2007-02-13 Huette Klein-Reichenbach Gesellschaft Mbh Process for producing a lightweight molded part and molded part made of metal foam
US7410523B2 (en) * 2002-11-19 2008-08-12 Honda Motor Co., Ltd. Foaming agent for manufacturing a foamed or porous metal
US7481964B2 (en) 2002-03-04 2009-01-27 Cymat Corp. Sealed impeller for producing metal foam and system and method therefor
CZ304437B6 (en) * 2001-06-15 2014-05-07 HĂśTTE KLEIN-REICHENBACH GESELLSCHAFT M. B. H. Process for producing a lightweight molded body and molded body made of metal foam
CN111434788A (en) * 2019-01-15 2020-07-21 杨怡虹 Production and preparation method of composite foamed aluminum material
CN119753412A (en) * 2025-03-06 2025-04-04 东北大学 A method for preparing a foamable preform using recycled aluminum and aluminum ash as raw materials

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US5112697A (en) * 1989-09-06 1992-05-12 Alcan International Limited Stabilized metal foam body
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RU2193948C2 (en) * 1999-07-06 2002-12-10 Лебедев Виктор Иванович Method for making porous metal and articles of such metal
US6343640B1 (en) * 2000-01-04 2002-02-05 The University Of Alabama Production of metal/refractory composites by bubbling gas through a melt
US6464933B1 (en) 2000-06-29 2002-10-15 Ford Global Technologies, Inc. Forming metal foam structures
DE102005037069B4 (en) * 2005-08-05 2010-03-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Porous composites based on a metal and process for their preparation
JP4189401B2 (en) * 2005-10-05 2008-12-03 本田技研工業株式会社 Method for producing foamed aluminum
RU2301132C1 (en) * 2005-12-09 2007-06-20 Юрий Апполинарьевич Караник Casting
DE102008000100B4 (en) 2008-01-18 2013-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. A process for producing a lightweight green body, then manufactured lightweight green body and method for producing a lightweight molded article
RU2371498C1 (en) * 2008-06-18 2009-10-27 Открытое акционерное общество "Научно-производственное предприятие "Радий" Microstructure constructional material on basis of aluminium or its alloys
CN110052594B (en) * 2019-04-25 2024-01-02 清华大学 Foam metal preparation method and foam metal preparation device

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FR1259163A (en) * 1960-05-24 1961-04-21 Lor Corp Foaming granulated aluminum
US3297431A (en) * 1965-06-02 1967-01-10 Standard Oil Co Cellarized metal and method of producing same
US3816952A (en) * 1969-02-19 1974-06-18 Ethyl Corp Preparation of metal foams with viscosity increasing gases
FR2282479A1 (en) * 1974-08-19 1976-03-19 Pechiney Aluminium Foamed aluminium alloy - made by casting alloy contg. hydrogen and oxygen and permitting expansion on release of gases

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Publication number Priority date Publication date Assignee Title
FR1259163A (en) * 1960-05-24 1961-04-21 Lor Corp Foaming granulated aluminum
US3297431A (en) * 1965-06-02 1967-01-10 Standard Oil Co Cellarized metal and method of producing same
US3816952A (en) * 1969-02-19 1974-06-18 Ethyl Corp Preparation of metal foams with viscosity increasing gases
FR2282479A1 (en) * 1974-08-19 1976-03-19 Pechiney Aluminium Foamed aluminium alloy - made by casting alloy contg. hydrogen and oxygen and permitting expansion on release of gases

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JP2635817B2 (en) 1997-07-30
KR920703862A (en) 1992-12-18
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DK0483184T3 (en) 1994-05-30
RU2046151C1 (en) 1995-10-20
NO892925L (en) 1991-01-18
JPH04506835A (en) 1992-11-26
ES2049037T3 (en) 1994-04-01
EP0483184B1 (en) 1994-01-26
ATE100867T1 (en) 1994-02-15
NO892925D0 (en) 1989-07-17
BR9007549A (en) 1992-06-30
DE69006359D1 (en) 1994-03-10
CA2064099A1 (en) 1991-01-18
KR100186782B1 (en) 1999-05-01
NO172697C (en) 1993-08-25
HU210524B (en) 1995-04-28
DE69006359T2 (en) 1994-05-11
NO172697B (en) 1993-05-18
EP0483184A1 (en) 1992-05-06
DE483184T1 (en) 1992-08-13
HUT60791A (en) 1992-10-28

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