EP1397223A2 - Production of metal foams - Google Patents

Production of metal foams

Info

Publication number
EP1397223A2
EP1397223A2 EP02740540A EP02740540A EP1397223A2 EP 1397223 A2 EP1397223 A2 EP 1397223A2 EP 02740540 A EP02740540 A EP 02740540A EP 02740540 A EP02740540 A EP 02740540A EP 1397223 A2 EP1397223 A2 EP 1397223A2
Authority
EP
European Patent Office
Prior art keywords
metal
metals
weight
viiib
blowing
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.)
Granted
Application number
EP02740540A
Other languages
German (de)
French (fr)
Other versions
EP1397223B1 (en
Inventor
Wilfried Knott
Andreas Weier
Dagmar Windbiel
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.)
Evonik Operations GmbH
Original Assignee
TH Goldschmidt AG
Goldschmidt GmbH
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 TH Goldschmidt AG, Goldschmidt GmbH filed Critical TH Goldschmidt AG
Priority to SI200230561T priority Critical patent/SI1397223T1/en
Publication of EP1397223A2 publication Critical patent/EP1397223A2/en
Application granted granted Critical
Publication of EP1397223B1 publication Critical patent/EP1397223B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1103—Making porous workpieces or articles with particular physical characteristics
    • B22F3/1112—Making porous workpieces or articles with particular physical characteristics comprising hollow spheres or hollow fibres
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
    • B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
    • B22F3/1134—Inorganic fillers
    • 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

  • the invention relates to a method for producing structure-controlled metal foams and the foam-shaped metal bodies obtained in this way.
  • DE 197 44 300 A deals with the production and use of porous light metal parts or light metal alloy parts, the bodies pressed from a powder mixture (light metal or aluminum alloy and blowing agent) in a heatable closed vessel with inlet and outlet opening to temperatures above the decomposition temperature of the blowing agent and / or melting temperature of the metal or alloy.
  • JP 03017236 A describes a process for producing metallic articles with cavities by dissolving gases in a molten metal and then the foaming process by sudden initiates pressure reduction. Cooling the melt stabilizes the foam thus obtained.
  • WO 92/21457 teaches the production of Al foam or Al alloy foam by blowing gas under the surface of a molten metal, with abrasives such.
  • metallic foams are obtained with the controlled release of propellant gases by first melting the metals at temperatures below the decomposition temperature of the propellant used. Subsequent dispersion of the blowing agent in the molten metal and heating of the matrix above the temperature then required to release blowing gases establishes a metal foam.
  • Foam aluminum is obtained after infiltration of molten aluminum into a porous filler by removing it from the solidified metal (Zhuzao Bianjibu (1997) (2) 1-4; ZHUZET, ISSN: 1001-4977).
  • DE 195 01 508 A deals with a component for the chassis of a motor vehicle, which consists of die-cast aluminum and has a cavity profile, inside of which there is a core made of aluminum foam.
  • the integrated aluminum foam core is opened beforehand produced by powder metallurgy, then fixed to the inner wall of a casting tool and then with the die casting process
  • the infiltration technique in which the porous filler has to be laboriously removed from the foam matrix, must also be assessed from this aspect.
  • the dissolving or blowing in of propellant gases in metal melts is not suitable for the production of near-net shape workpieces, since a system consisting of the melt with occluded gas bubbles is not sufficiently stable in time to be processed in shaping tools.
  • the mechanical properties of metal foams are essentially - apart from the selection of the metal or alloy used - structurally determined.
  • the coupled processes taking place in the manufacture of porous metal bodies often do not produce the desired result of a uniform metal foam with dimensions comparable to globular cells, particularly in the method based on the use of chemical blowing agents.
  • isotropy of the spatial density which could be desired for the later function of the metal foam in numerous structural components, is not achieved.
  • irregularities are observed in the form of thickened zones in the metal body (for example pronounced foot and / or edge zone formation and / or also connected cavities which result from the combination of individual gas bubbles resulting from cell membrane destruction). The occurrence of such irregularities can also be an indicator of a relatively inefficient use of propellants.
  • the object of the present invention is to find a technically usable method for targeted structure control in the metal foams produced with chemical blowing agents. Linked to this, it is important to improve the use of blowing agents (for example a metal hydride).
  • a first embodiment for achieving the aforementioned object therefore consists in a process for producing metal foams, which is characterized in that metals from groups IB to VIIIB of the periodic table of the elements are added before and / or during foam formation.
  • metals from groups IB-VIIIB of the Periodic Table of the Elements in particular as an addition to hydride-loaded systems, have a morphology-controlling effect and the Increase blowing agent efficiency significantly.
  • the added metals of groups IB to VIIIB of the periodic table of the elements can be applied both individually and in the form of a mixture of several metals.
  • the method according to the invention therefore provides for the matrix consisting of light metal or light metal alloy and hydride propellant to be expanded with small amounts of titanium, copper, iron, vanadium and mixtures thereof.
  • the metallic additives are particularly preferred in amounts of from 0.001% by weight to 1% by weight, particularly preferably from 0.01% by weight to 0.1% by weight, based on the metal to be foamed, in particular on the foaming light metal used.
  • a particularly preferred blowing agent in the sense of the present invention is magnesium hydride, in particular autocatalytically produced magnesium hydride, the production of which is known from the literature.
  • this magnesium hydride is commercially available from the applicant under the name Tego Magnan®.
  • the amount of blowing agent can be varied within the usual limits of 0.1% by weight to 5% by weight, preferably from 0.25% by weight to 2% by weight.
  • the use of the observed phenomenon ensures the production of very regular foam structures and ensures the reproducibility of morphologically uniform metal foams, which is required under application-technical aspects.
  • the application of the method according to the invention can be used for
  • Foaming process help to suppress the process of cell membrane destruction. Evaluation criteria for the qualitative assessment of plastic foams as well as metal foams are, in addition to the visually recognizable homogeneity, the expansion achieved and the associated final density of the porous metal body.
  • the compacts were placed in a graphite crucible Heating rate of 300 ° C / min. foamed freely.
  • the foam bodies were rapidly cooled 30 seconds after the start of the foaming process.
  • Example 2 Analogously to Example 1, 500 g of aluminum powder with 1% by weight of Tego Magnan (magnesium hydride), based on the amount of aluminum powder, 0.1% by weight of titanium powder, based on the amount of aluminum powder and 0.01% by weight of vanadium powder , based on the amount of aluminum powder. This mixture was compacted as described above. The degree of compaction of the cylindrical compacts thus obtained was 94 to 96%.
  • Tego Magnan magnesium hydride
  • Example 2 Analogously to Example 1, 500 g of aluminum powder, 1% by weight of Tego Magnan (magnesium hydride), based on the amount of aluminum powder, 0.1% by weight of titanium powder, based on the amount of aluminum powder and 0.01% by weight of iron powder , based on the amount of aluminum powder, mixed, compacted and the green bodies obtained are foamed. After sawing it was one homogeneous structure with an average cell size of 5 mm visible. The measured density was 0.7 g / cm 3 .
  • Example 2 Analogously to Example 1, 500 g of aluminum powder, 1% by weight of Tego Magnan® ( magnesium hydride), based on the amount of aluminum powder and 0.1% by weight of titanium powder, based on the amount of aluminum powder, were mixed and compacted. The degree of compaction was between 95 and 97% of the theoretically achievable density. The green bodies obtained in this way were foamed and after sawing up a homogeneous structure with an average cell size of 3.5 to 4 mm was recognizable. The measured density was 0.3 g / cm 3 .
  • Example 2 Analogously to Example 1, 500 g of aluminum powder, 0.1% by weight of titanium hydride, based on the amount of aluminum powder and 0.1% by weight of titanium powder, based on the amount of aluminum powder, were mixed, compacted and freely foamed. After sawing, a coarse, very heterogeneous foam structure with an average cell size of 8 mm was visible. Several pore membranes were torn. The density determined was 0.7 g / cm 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Catalysts (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention relates to a process for producing metal foams of controlled structure and to the metal bodies in foam form obtained in this way, wherein metals from group IB to VIIIB of the periodic system of the elements are added before and/or during the formation of the foam.

Description

Herstellung von MetallschäumenManufacture of metal foams
Gegenstand der Erfindung ist ein Verfahren zur Herstellung von strukturgeregelten Metallschäumen sowie die auf diesem Wege erhaltenen schaumförmigen Metallkörper.The invention relates to a method for producing structure-controlled metal foams and the foam-shaped metal bodies obtained in this way.
Der Stand der Technik zur Herstellung von Metallschäumen umfaßt im wesentlichen fünf prinzipielle Vorgehensweisen:The prior art for the production of metal foams essentially comprises five basic procedures:
1. das Kompaktieren von Metallpulvern mit geeigneten Treibmitteln und Erhitzen der so gewonnenen Grünkörper auf Temperaturen oberhalb der Liquidustemperatur der Metallmatrix und oberhalb der Zersetzungstemperatur des verwendeten Treibmittels; 2. das Lösen bzw. Einblasen von Treibgasen in Metallschmelzen;1. the compacting of metal powders with suitable blowing agents and heating the green bodies thus obtained to temperatures above the liquidus temperature of the metal matrix and above the decomposition temperature of the blowing agent used; 2. the dissolving or blowing in of propellant gases in metal melts;
3. das Einrühren von Treibmitteln in Metallschmelzen;3. the stirring of blowing agents in molten metals;
4. das Sintern metallischer Hohlkugeln;4. the sintering of hollow metallic spheres;
5. die Infiltration von Metallschmelzen in Füllkörper, die nach Erstarren der Schmelze entfernt werden.5. the infiltration of molten metal into packing, which are removed after the melt solidifies.
ad 1) Die DE 197 44 300 A beschäftigt sich mit der Herstellung und Verwendung von porösen Leichtmetall-Teilen bzw. Leichtmetall-Legierungsteilen, wobei die aus einer Pulvermischung (Leichtmetall- bzw. AI-Legierung und Treibmittel) gepreßten Körper in einem beheizbaren geschlossenen Gefäß mit Einlaß- und Austrittsöffnung auf Temperaturen oberhalb der Zersetzungstemperatur des Treibmittels und/oder Schmelztemperatur des Metalls bzw. der Legierung erhitzt werden.ad 1) DE 197 44 300 A deals with the production and use of porous light metal parts or light metal alloy parts, the bodies pressed from a powder mixture (light metal or aluminum alloy and blowing agent) in a heatable closed vessel with inlet and outlet opening to temperatures above the decomposition temperature of the blowing agent and / or melting temperature of the metal or alloy.
ad 2) Die JP 03017236 A beschreibt ein Verfahren zur Erzeugung metallischer Artikel mit Hohlräumen, indem man Gase in einer Metallschmelze löst und den Aufschäumvorgang dann durch plötz- liehe Druckverringerung einleitet. Abkühlen der Schmelze stabilisiert den so erhaltenen Schaum.ad 2) JP 03017236 A describes a process for producing metallic articles with cavities by dissolving gases in a molten metal and then the foaming process by sudden initiates pressure reduction. Cooling the melt stabilizes the foam thus obtained.
Die WO 92/21457 lehrt die Herstellung von Al-Schaum bzw. Al-Le- gierungsschäum durch das Einblasen von Gas unter die Oberfläche eines geschmolzenen Metalls, wobei Abrasivstoffe, wie z. B. SiC, Zr02 usw. , als Stabilisatoren dienen.WO 92/21457 teaches the production of Al foam or Al alloy foam by blowing gas under the surface of a molten metal, with abrasives such. B. SiC, Zr0 2 , etc., serve as stabilizers.
ad 3) Der Lehre der JP 09241780 A folgend, werden metallische Schäume unter kontrollierter Freisetzung von Treibgasen gewonnen, indem die Metalle zunächst bei Temperaturen unterhalb der Zersetzungstemperatur des verwendeten Treibmittels geschmolzen werden. Durch nachfolgendes Dispergieren des Treibmittels im geschmolzenen Metall und Erhitzen der Matrix über die dann zur Freisetzung von Treibgasen benötigte Temperatur etabliert sich ein Metallschäum.ad 3) Following the teaching of JP 09241780 A, metallic foams are obtained with the controlled release of propellant gases by first melting the metals at temperatures below the decomposition temperature of the propellant used. Subsequent dispersion of the blowing agent in the molten metal and heating of the matrix above the temperature then required to release blowing gases establishes a metal foam.
ad 4) Die Herstellung ultraleichter Ti-6A1-4V-Hohlkugelschäume beruht auf der bei Temperaturen > 1000 °C erfolgenden Sinterung hydrierter Ti-6Al-4V-Hohlkugeln bei 600 °C (Synth./ Process . Lightweight Met. Mater. II, Proc. Symp. 2nd (1997), 289-300).ad 4) The production of ultralight Ti-6A1-4V hollow spheres is based on the sintering of hydrogenated Ti-6Al-4V hollow spheres at temperatures> 1000 ° C at 600 ° C (Synth./ Process. Lightweight Met. Mater. II, Proc Symp. 2nd (1997), 289-300).
ad 5) Schaumaluminium wird nach Infiltration geschmolzenen Aluminiums in einen porösen Füllstoff durch Entfernen desselben aus dem erstarrten Metall erhalten (Zhuzao Bianjibu (1997) (2) 1-4; ZHUZET, ISSN: 1001-4977) .ad 5) Foam aluminum is obtained after infiltration of molten aluminum into a porous filler by removing it from the solidified metal (Zhuzao Bianjibu (1997) (2) 1-4; ZHUZET, ISSN: 1001-4977).
Von besonderem Interesse sind darüber hinaus Bauteile mit einem Hohlraumprofil zur Gewichtsreduzierung und Erhöhung ihrer Steifigkeit. Die DE 195 01 508 A beschäftigt sich mit einem Bauteil für das Fahrwerk eines Kraftfahrzeugs, welches aus Aluminiumdruckguß besteht und ein Hohlraumprofil aufweist, in dessen Inneren sich ein Kern aus Aluminiumschaum befindet . Der integrierte Aluminiumschaumkern wird zuvor auf pulvermetallurgischem Wege hergestellt, dann an der Innenwand eines Gußwerkzeugs fixiert und danach im Druckgußverfahren mitIn addition, components with a cavity profile to reduce weight and increase their rigidity are of particular interest. DE 195 01 508 A deals with a component for the chassis of a motor vehicle, which consists of die-cast aluminum and has a cavity profile, inside of which there is a core made of aluminum foam. The integrated aluminum foam core is opened beforehand produced by powder metallurgy, then fixed to the inner wall of a casting tool and then with the die casting process
Metall umgössen.Cast metal.
Bei Würdigung des Standes der Technik ist festzustellen, daß die Verfahren, die ein Vorkompaktieren Treibmittel enthaltender Grünkörper vorsehen, aufwendig und kostspielig sind und sich nicht zur Herstellung von Massengütern eignen. Außerdem ist diesen Verfahren gemeinsam, daß die angestrebte Temperatur- differenz zwischen dem Schmelzpunkt des zu schäumenden Metalls und der Zersetzungstemperatur des verwendeten Treibmittels möglichst gering sein soll, da sonst bereits während des Kompak- tierens oder später in der AufSchmelzphase störende Treibmittelzersetzung stattfindet. Diese Betrachtung gilt auch für das Eintragen von Treibmitteln in Metallschmelzen.When assessing the prior art, it should be noted that the processes which provide for pre-compacting green bodies containing propellants are complex and costly and are not suitable for the production of bulk goods. In addition, these processes have in common that the desired temperature difference between the melting point of the metal to be foamed and the decomposition temperature of the blowing agent used should be as low as possible, otherwise disruptive blowing agent decomposition already takes place during the compaction or later in the melting phase. This consideration also applies to the introduction of blowing agents in molten metals.
Dem Versintern präformierter Hohlkugeln zu einem metallischen Schaum kommt allenfalls akademisches Interesse zu, da die Herstellung der Hohlkugeln bereits eine aufwendige Verfahrenstech- nik erfordert .The sintering of preformed hollow spheres to a metallic foam is of academic interest at most, since the production of the hollow spheres already requires complex process technology.
Unter diesem Aspekt ist auch die Infiltrationstechnik zu bewerten, bei der man mühevoll den porösen Füllstoff aus der Schaummatrix entfernen muß.The infiltration technique, in which the porous filler has to be laboriously removed from the foam matrix, must also be assessed from this aspect.
Das Lösen bzw. Einblasen von Treibgasen in Metallschmelzen ist nicht zur Fertigung endkonturnaher Werkstücke geeignet, da ein System, bestehend aus der Schmelze mit okkludierten Gasblasen, nicht ausreichend zeitstabil ist, um in formgebenden Werkzeugen verarbeitet zu werden.The dissolving or blowing in of propellant gases in metal melts is not suitable for the production of near-net shape workpieces, since a system consisting of the melt with occluded gas bubbles is not sufficiently stable in time to be processed in shaping tools.
Die mechanischen Eigenschaften von Metallschäumen sind im wesentlichen - neben der Auswahl des verwendeten Metalls bzw. der Legierung - strukturdeterminiert . Die bei der Fertigung von porösen Metallkörpern stattfindenden, gekoppelten Vorgänge ergeben jedoch - insbesondere bei der auf Nutzung chemischer Treibmittel beruhenden Methode - oft nicht das angestrebte Resultat eines gleichförmigen, mit globulären Zellen vergleichbarer Dimension durchsetzten Metallschaums. Damit verbunden wird beispielsweise keine Isotropie der Raumdichte, die für die spätere Funktion des Metallschaums in zahlreichen konstruktiven Bauteilen gewünscht sein könnte, erreicht. Statt dessen beobachtet man Irregularitäten in Form verdickter Zonen im Metallkörper (beispielsweise ausgeprägte Fuß- und/oder Randzonenbildung und/oder auch verbundene Hohlräume, die sich aus dem durch Zellmembranzerstörung ergebenden Verbund einzelner Gasblasen herleiten) . Das Auftreten solcher Unregelmäßigkeiten kann zugleich Indikator einer relativ ineffizienten Treibmittelnutzung sein.The mechanical properties of metal foams are essentially - apart from the selection of the metal or alloy used - structurally determined. However, the coupled processes taking place in the manufacture of porous metal bodies often do not produce the desired result of a uniform metal foam with dimensions comparable to globular cells, particularly in the method based on the use of chemical blowing agents. Associated with this, for example, isotropy of the spatial density, which could be desired for the later function of the metal foam in numerous structural components, is not achieved. Instead, irregularities are observed in the form of thickened zones in the metal body (for example pronounced foot and / or edge zone formation and / or also connected cavities which result from the combination of individual gas bubbles resulting from cell membrane destruction). The occurrence of such irregularities can also be an indicator of a relatively inefficient use of propellants.
Somit definiert sich die Aufgabe der vorliegenden Erfindung darin, eine technisch nutzbare Methode zur gezielten Struktursteuerung bei den mit chemischen Treibmitteln erzeugten Metallschäumen zu finden. Hieran geknüpft gilt es, die Nutzung eingesetzten Treibmittels (beispielsweise eines Metallhydrids) zu verbessern.Thus, the object of the present invention is to find a technically usable method for targeted structure control in the metal foams produced with chemical blowing agents. Linked to this, it is important to improve the use of blowing agents (for example a metal hydride).
Eine erste Ausführungsform zur Lösung der vorgenannten Aufgabe besteht daher in einem Verfahren zur Herstellung von Metallschäumen, das dadurch gekennzeichnet ist, daß man Metalle der Gruppe IB bis VIIIB des Periodensystems der Elemente vor und/oder während der Schaumbildung zusetzt.A first embodiment for achieving the aforementioned object therefore consists in a process for producing metal foams, which is characterized in that metals from groups IB to VIIIB of the periodic table of the elements are added before and / or during foam formation.
Überraschenderweise wurde nun gefunden, daß Metalle der Gruppen IB - VIIIB des Periodischen Systems der Elemente insbesondere als Zusatz zu hydridbeaufschlagten Systemen im Sinne der obengenannten Aufgabe morphologiesteuernd wirken und die Treibmitteleffizienz signifikant erhöhen. Die zugesetzten Metalle der Gruppen IB bis VIIIB des Periodischen Systems der Elemente können sowohl einzeln als auch in Form einer Abmischung mehrerer Metalle appliziert werden.Surprisingly, it has now been found that metals from groups IB-VIIIB of the Periodic Table of the Elements, in particular as an addition to hydride-loaded systems, have a morphology-controlling effect and the Increase blowing agent efficiency significantly. The added metals of groups IB to VIIIB of the periodic table of the elements can be applied both individually and in the form of a mixture of several metals.
Das erfindungsgemäße Verfahren sieht somit in einer bevorzugten Ausführungsform vor, die Matrix bestehend aus Leichtmetall oder Leichtmetall-Legierung und hydridischem Treibmittel mit geringen Mengen an Titan, Kupfer, Eisen, Vanadium sowie deren Ge- mischen zu erweitern. Besonderes bevorzugt werden die metallischen Additive in Mengen von 0,001 Gew.-% bis 1 Gew.-%, besonders bevorzugt von 0,01 Gew.-% bis 0,1 Gew.-% bezogen auf das zu schäumende Metall, insbesondere auf das zu schäumende Leichtmetall eingesetzt.In a preferred embodiment, the method according to the invention therefore provides for the matrix consisting of light metal or light metal alloy and hydride propellant to be expanded with small amounts of titanium, copper, iron, vanadium and mixtures thereof. The metallic additives are particularly preferred in amounts of from 0.001% by weight to 1% by weight, particularly preferably from 0.01% by weight to 0.1% by weight, based on the metal to be foamed, in particular on the foaming light metal used.
Besonders bevorzugtes Treibmittel im Sinne der vorliegenden Erfindung ist Magnesiumhydrid, insbesondere autokatalytisch hergestelltes Magnesiumhydrid, dessen Herstellung aus der Literatur bekannt ist. Darüber hinaus ist dieses Magnesiumhydrid im Handel unter der Bezeichnung Tego Magnan® von der Anmelderin erhältlich. Allgemein kann die Treibmittelmenge in den üblichen Grenzen von 0,1 Gew. -% bis 5 Gew.-%, bevorzugterweise von 0,25 Gew.-% bis 2 Gew.-% variiert werden.A particularly preferred blowing agent in the sense of the present invention is magnesium hydride, in particular autocatalytically produced magnesium hydride, the production of which is known from the literature. In addition, this magnesium hydride is commercially available from the applicant under the name Tego Magnan®. In general, the amount of blowing agent can be varied within the usual limits of 0.1% by weight to 5% by weight, preferably from 0.25% by weight to 2% by weight.
Die Nutzung des beobachteten Phänomens gewährleistet die Herstellung sehr regulärer Schaumstrukturen und sichert die unter anwendungstechnischen Aspekten geforderte Reproduzierbarkeit morphologisch einheitlicher Metallschäume. Wesent- lieh kann die Anwendung des erfindungsgemäßen Verfahrens beimThe use of the observed phenomenon ensures the production of very regular foam structures and ensures the reproducibility of morphologically uniform metal foams, which is required under application-technical aspects. The application of the method according to the invention can be used for
Aufschäumprozess helfen, den Vorgang der Zellmembranzerstörung zu unterdrücken. Bewertungskriterien für die qualitative Beurteilung von Kunststoffschäumen sowie von Metallschäumen sind neben der visuell erkennbaren Homogenität die erzielte Expansion und damit einhergehend die Enddichte des porösen Metallkörpers .Foaming process help to suppress the process of cell membrane destruction. Evaluation criteria for the qualitative assessment of plastic foams as well as metal foams are, in addition to the visually recognizable homogeneity, the expansion achieved and the associated final density of the porous metal body.
Unter Nutzung der pulvermetallurgischen Route (Mischen von Leichtmetallpulver mit hydridischem Treibmittel und gegebenenfalls Zusätzen, Vorkompaktieren und/oder Verpressen der Matrix zu Grünkörpern, Erhitzen der Grünkörper auf Temperaturen oberhalb des Schmelzpunktes des zu schäumenden Metalls) soll hier das verallgemeinerbare Prinzip der vorliegenden Erfindung belegt werden. Die erfindungsgemäße Beaufschlagung eines Metall-Hydrid-Systems mit den hier beanspruchten Zusätzen ist selbstverständlich nicht auf die pulvermetallurgische Methode beschränkt, sondern erfaßt auch Systeme, die man der Schmelzmetallurgie zurechnen muß.Using the powder metallurgical route (mixing light metal powder with hydridic blowing agent and possibly additives, precompacting and / or pressing the matrix into green bodies, heating the green bodies to temperatures above the melting point of the metal to be foamed), the generalizable principle of the present invention is to be demonstrated here. The application of a metal-hydride system according to the invention with the additives claimed here is of course not limited to the powder metallurgical method, but also covers systems that have to be attributed to the melt metallurgy.
Ausführungsbeispiele :Examples:
Beispiel 1:Example 1:
500 g Aluminiumpulver mit einer Reinheit von 99,5% wurden mit 1 Gew.-% Tego Magnan® (Magnesiumhydrid, 95% Hydridgehalt), bezogen auf die Menge an Aluminiumpulver, sowie 0,1 Gew.-% Titanpulver, bezogen auf die Menge an Aluminiumpulver und 0,01 Gew.-% Kupferpulver, bezogen auf die Menge an Aluminiumpulver, beaufschlagt und unter Rühren gemischt . Aus dieser Mischung wurden zylinderförmige Preßlinge durch kaltisostatisches Pressen hergestellt. Der Kompaktierungsgrad der so erhaltenen Preßlinge lag bei 94 bis 97 % der theoretisch zu erreichenden500 g of aluminum powder having a purity of 99.5% were mixed with 1 wt .-% Tego Magnan ® (magnesium hydride, 95% hydride), based on the amount of aluminum powder and 0.1 wt .-% of titanium powder, based on the amount aluminum powder and 0.01% by weight copper powder, based on the amount of aluminum powder, and mixed with stirring. Cylindrical compacts were produced from this mixture by cold isostatic pressing. The degree of compaction of the compacts obtained in this way was 94 to 97% of the theoretically achievable
Dichte.Density.
In einem Induktionsofen mit einer HF Ausgangsleistung von 1,5 kW wurden die Preßlinge im Graphit -Tiegel mit einer Aufheizrate von 300°C/min. frei geschäumt. 30 Sekunden nach Beginn des Schäumvorganges wurden die Schaumkörper schnell abgekühlt .In an induction furnace with an RF output power of 1.5 kW, the compacts were placed in a graphite crucible Heating rate of 300 ° C / min. foamed freely. The foam bodies were rapidly cooled 30 seconds after the start of the foaming process.
Nach Zersägen der Proben erkannte man in Fig. 1 homogen verteilte globuläre Zellen mit einem mittleren Durchmesser von 3 mm bis in die Randbereiche. Die erzielte Dichte lag bei 0,5 g/cm3.After the samples had been sawn apart, globular cells with an average diameter of 3 mm were recognized in FIG. The density achieved was 0.5 g / cm 3 .
Beispiel 2:Example 2:
Analog Beispiel 1 wurden 500 g Aluminiumpulver mit 1 Gew.-% Tego Magnan (Magnesiumhydrid) , bezogen auf die Menge an Aluminiumpulver, 0,1 Gew.-% Titanpulver, bezogen auf die Menge an Aluminiumpulver und 0,01 Gew.-% Vanadiumpulver, bezogen auf die Menge an Aluminiumpulver, versetzt. Diese Mischung wurde wie oben beschrieben kompaktiert . Der Kompaktierungsgrad der so erhaltenen zylindrischen Preßlinge lag bei 94 bis 96%.Analogously to Example 1, 500 g of aluminum powder with 1% by weight of Tego Magnan (magnesium hydride), based on the amount of aluminum powder, 0.1% by weight of titanium powder, based on the amount of aluminum powder and 0.01% by weight of vanadium powder , based on the amount of aluminum powder. This mixture was compacted as described above. The degree of compaction of the cylindrical compacts thus obtained was 94 to 96%.
Nach dem Aufschäumen und Zersägen wurde eine feine homogene Zellstruktur sichtbar, die eine mittlere Größe von 1,5 bis 2 mm bei einer Dichte von 0,6 g/cm3 aufwies.After foaming and sawing, a fine homogeneous cell structure was visible, which had an average size of 1.5 to 2 mm at a density of 0.6 g / cm 3 .
Die entstehende Schaumstruktur wird durch Fig. 2 dokumentiert,The resulting foam structure is documented by Fig. 2,
Beispiel 3 :Example 3:
Analog Beispiel 1 wurden 500 g Aluminiumpulver, 1 Gew.-% Tego Magnan (Magnesiumhydrid) , bezogen auf die Menge an Aluminiumpulver, 0,1 Gew.-% Titanpulver, bezogen auf die Menge an Aluminiumpulver und 0,01 Gew.-% Eisenpulver, bezogen auf die Menge an Aluminiumpulver, gemischt, kompaktiert und die erhaltenen Grünkörper geschäumt . Nach dem Zersägen war eine homogene Struktur mit einer mittleren Zellgröße von 5 mm sichtbar. Die gemessene Dichte lag bei 0,7 g/cm3.Analogously to Example 1, 500 g of aluminum powder, 1% by weight of Tego Magnan (magnesium hydride), based on the amount of aluminum powder, 0.1% by weight of titanium powder, based on the amount of aluminum powder and 0.01% by weight of iron powder , based on the amount of aluminum powder, mixed, compacted and the green bodies obtained are foamed. After sawing it was one homogeneous structure with an average cell size of 5 mm visible. The measured density was 0.7 g / cm 3 .
Die entstehende Schaumstruktur wird durch Fig. 3 dokumentiert.The resulting foam structure is documented by Fig. 3.
Beispiel 4Example 4
Analog Beispiel 1 wurden 500 g Aluminiumpulver, 1 Gew.-% Tego Magnan® (Magnesiumhydrid) , bezogen auf die Menge an Aluminiumpulver und 0,1 Gew.-% Titanpulver, bezogen auf die Menge an Aluminiumpulver, gemischt und kompaktiert. Der Kompaktierungsgrad lag zwischen 95 bis 97 % der theoretisch erreichbaren Dichte . Die so erhaltenen Grünkörper wurden geschäumt und nach dem Zersägen war eine homogene Struktur mit einer mittleren Zellgröße von 3,5 bis 4 mm erkennbar. Die gemessene Dichte lag bei 0 , 3 g/cm3.Analogously to Example 1, 500 g of aluminum powder, 1% by weight of Tego Magnan® ( magnesium hydride), based on the amount of aluminum powder and 0.1% by weight of titanium powder, based on the amount of aluminum powder, were mixed and compacted. The degree of compaction was between 95 and 97% of the theoretically achievable density. The green bodies obtained in this way were foamed and after sawing up a homogeneous structure with an average cell size of 3.5 to 4 mm was recognizable. The measured density was 0.3 g / cm 3 .
Die entstehende Schaumstruktur wird durch Fig. 4 dokumentiert.The resulting foam structure is documented by Fig. 4.
Bezugsbeispiel 1:Reference example 1:
Analog Beispiel 1 wurden 500 g Aluminiumpulver, 0,1 Gew.-% Titanhydrid, bezogen auf die Menge an Aluminiumpulver und 0,1 Gew.-% Titanpulver, bezogen auf die Menge an Aluminiumpulver, gemischt, kompaktiert und frei aufgeschäumt. Nach dem Zersägen war eine grobe, sehr heterogene Schaumstruktur mit einer mittleren Zellgröße von 8 mm sichtbar. Etliche Porenmembranen waren zerrissen. Die ermittelte Dichte betrug 0,7 g/cm3.Analogously to Example 1, 500 g of aluminum powder, 0.1% by weight of titanium hydride, based on the amount of aluminum powder and 0.1% by weight of titanium powder, based on the amount of aluminum powder, were mixed, compacted and freely foamed. After sawing, a coarse, very heterogeneous foam structure with an average cell size of 8 mm was visible. Several pore membranes were torn. The density determined was 0.7 g / cm 3 .
Die entstehende Schaumstruktur wird durch Fig. 5 dokumentiert. Bezugsbeispiel 2 :The resulting foam structure is documented by Fig. 5. Reference example 2:
Analog Vergleichsbeispiel 1 wurden 500 g Aluminiumpulver, 0,1 Gew.-% Titanhydrid, bezogen auf die Menge an Aluminiumpulver und 0,1 Gew.-% Kupferpulver, bezogen auf die Menge an Aluminiumpulver, gemischt und kompaktiert. Nach dem Verschäumen und Zersägen zeigte sich eine zerrissene inhomogene Struktur mit einer mittleren Porengröße von 5,5 mm und einer deutlichen Sockelbildung. Die erreichte Dichte lag bei 0,5 g/cm3.Analogously to Comparative Example 1, 500 g of aluminum powder, 0.1% by weight of titanium hydride, based on the amount of aluminum powder and 0.1% by weight of copper powder, based on the amount of aluminum powder, were mixed and compacted. After foaming and sawing, there was a torn inhomogeneous structure with an average pore size of 5.5 mm and a clear base formation. The density reached was 0.5 g / cm 3 .
Die entstehende Schaumstruktur wird durch Fig. 6 dokumentiert.The resulting foam structure is documented by Fig. 6.
Es zeigte sich deutlich, dass durch die erfindungsgemäße Zugabe geringer Mengen an Übergangsmetallen und/oder deren Gemischen die Morphologie und Enddichte der geschäumten Metallkörper deutlich beeinflusst wurde. It was clearly shown that the addition of small amounts of transition metals and / or their mixtures according to the invention significantly influenced the morphology and final density of the foamed metal body.

Claims

Patentansprüche : Claims:
1. Verfahren zur Herstellung von Metallschäumen, dadurch gekennzeichnet ist, daß man Metalle der Gruppe IB bis VIIIB des1. A method for producing metal foams, characterized in that metals from groups IB to VIIIB of
Periodensystems der Elemente vor und/oder während der Schaumbildung zusetzt.Periodic table of elements before and / or during foam formation.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man die Schaumbildung erreicht durch2. The method according to claim 1, characterized in that the foam formation is achieved by
Kompaktieren von Metallpulvern mit Treibmitteln und Erhitzen der so gewonnenen Grünkörper auf Temperaturen oberhalb derCompacting metal powders with blowing agents and heating the green body thus obtained to temperatures above the
Liquidustemperaturen der Metallmatrix und oberhalb derLiquidus temperatures of the metal matrix and above the
Zersetzungstemperaturen des Treibmittels, Lösen und/oder Einblasen von Treibgasen in Metallschmelzen,Decomposition temperatures of the blowing agent, dissolving and / or blowing in of blowing gases in molten metals,
Einrühren von Treibmitteln in Metallschmelzen,Stirring of blowing agents in molten metals,
Sintern metallischer Hohlkugeln oderSintering hollow metallic balls or
Infiltrieren von Metallschmelzen in Füllkörpern, die nachInfiltration of molten metal in packing, which after
Erstarren der Schmelze entfernt werden.Solidification of the melt can be removed.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man die Metalle der Gruppe IB bis VIIIB in Form von Pulvern zusetzt .3. The method according to claim 1 or 2, characterized in that the metals of groups IB to VIIIB are added in the form of powders.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß man Metalle der Gruppe IB bis VIIIB einsetzt, die ausgewählt sind aus der Gruppe bestehend aus Titan, Kupfer, Eisen, Vanadium und deren Gemischen.4. The method according to any one of claims 1 to 3, characterized in that metals from groups IB to VIIIB are used which are selected from the group consisting of titanium, copper, iron, vanadium and mixtures thereof.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß man die Metalle der Gruppe IB bis VIIIB in einer Menge von 0,001 Gew.-% bis 1 Gew.-%, insbesondere 0,01 Gew.-% bis 0,1 Gew.-% bezogen auf das zu schäumende Metall, insbesondere auf das zu schäumende Leichtmetall zusetzt. 5. The method according to any one of claims 1 to 4, characterized in that the metals of groups IB to VIIIB in an amount of 0.001% by weight to 1% by weight, in particular 0.01% by weight to 0, 1% by weight, based on the metal to be foamed, in particular on the light metal to be foamed.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man Treibmittel in einer Menge von 0,1 bis 5 Gew.-%, insbesondere 0,25 bis 2 Gew.-%, bezogen auf das Metall, insbesondere auf das zu schäumende Leichtmetall einsetzt .6. The method according to any one of claims 1 to 5, characterized in that blowing agent in an amount of 0.1 to 5 wt .-%, in particular 0.25 to 2 wt .-%, based on the metal, in particular on the light metal to be foamed.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man als Treibmittel Magnesiumhydrid, insbesondere autokatalytisch hergestelltes Magnesiumhydrid einsetzt .7. The method according to any one of claims 1 to 6, characterized in that magnesium hydride, in particular autocatalytically produced magnesium hydride, is used as the blowing agent.
8. Verwendung von Metallen der Gruppe IB bis VIIIB des Periodensystems der Elemente vor und/oder während der Schaumbildung von Metallschäumen zur Steuerung der Morphologie der Schäume und/oder zur Erhöhung der Effizienz des Treibmitteleinsatzes .8. Use of metals from groups IB to VIIIB of the periodic table of the elements before and / or during the foaming of metal foams to control the morphology of the foams and / or to increase the efficiency of the blowing agent.
9. Metallschäume erhältlich nach einem Verfahren gemäß einem der Ansprüche 1 bis 7. 9. metal foams obtainable by a process according to any one of claims 1 to 7.
EP02740540A 2001-05-19 2002-04-30 Production of metal foams Expired - Lifetime EP1397223B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200230561T SI1397223T1 (en) 2001-05-19 2002-04-30 Production of metal foams

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124533 2001-05-19
DE10124533 2001-05-19
PCT/EP2002/004742 WO2002094483A2 (en) 2001-05-19 2002-04-30 Production of metal foams

Publications (2)

Publication Number Publication Date
EP1397223A2 true EP1397223A2 (en) 2004-03-17
EP1397223B1 EP1397223B1 (en) 2007-03-21

Family

ID=7685460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740540A Expired - Lifetime EP1397223B1 (en) 2001-05-19 2002-04-30 Production of metal foams

Country Status (9)

Country Link
US (1) US6942716B2 (en)
EP (1) EP1397223B1 (en)
JP (1) JP4344141B2 (en)
AT (1) ATE357304T1 (en)
AU (1) AU2002314016A1 (en)
CA (1) CA2443826A1 (en)
DE (1) DE50209776D1 (en)
ES (1) ES2281521T3 (en)
WO (1) WO2002094483A2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100985231B1 (en) * 2007-11-30 2010-10-05 이세린 Porous Light Weight Body and Method for Preparing Thereof
CN101220423B (en) * 2008-01-25 2010-04-21 太原科技大学 Method for manufacturing foam aluminum alloy
CN102438778B (en) 2009-03-30 2014-10-29 三菱综合材料株式会社 Process for producing porous sintered aluminum, and porous sintered aluminum
JP5402380B2 (en) * 2009-03-30 2014-01-29 三菱マテリアル株式会社 Method for producing porous aluminum sintered body
DE102009003274A1 (en) * 2009-05-20 2010-11-25 Evonik Goldschmidt Gmbh Compositions containing polyether-polysiloxane copolymers
DE102014209408A1 (en) 2014-05-19 2015-11-19 Evonik Degussa Gmbh Ethoxylate preparation using highly active double metal cyanide catalysts
PL3168273T3 (en) 2015-11-11 2018-10-31 Evonik Degussa Gmbh Curable polymers
PL3321304T3 (en) 2016-11-15 2019-11-29 Evonik Degussa Gmbh Mixtures of cyclic branched d/t-type siloxanes and their ensuing products
CN106756188B (en) * 2017-01-21 2018-07-10 杨林 A kind of uniform foamed aluminium preparation method of pore structure
CN106670466B (en) * 2017-01-21 2018-06-19 杨林 A kind of preparation method of foamed aluminium
CN106702199B (en) * 2017-01-21 2018-08-10 杨林 A kind of preparation method of foaming aluminum material
EP3415548B1 (en) 2017-06-13 2020-03-25 Evonik Operations GmbH Method for producing sic-linked polyether siloxanes
EP3415547B1 (en) 2017-06-13 2020-03-25 Evonik Operations GmbH Method for producing sic-linked polyether siloxanes
EP3438158B1 (en) 2017-08-01 2020-11-25 Evonik Operations GmbH Production of sioc-linked siloxanes
DE102017121513A1 (en) * 2017-09-15 2019-03-21 Pohltec Metalfoam Gmbh Process for foaming metal in the liquid bath
EP3467006B1 (en) 2017-10-09 2022-11-30 Evonik Operations GmbH Mixtures of cyclic branched d/t-type siloxanes and their ensuing products
EP3492513B1 (en) 2017-11-29 2021-11-03 Evonik Operations GmbH Method of manufacturing sioc linked polyether branched in siloxane section
CN109205806A (en) * 2018-08-07 2019-01-15 厦门建霖健康家居股份有限公司 A kind of environment-friendly type non-phosphorus scale foamed alloy cluster and preparation method thereof
EP3611214A1 (en) 2018-08-15 2020-02-19 Evonik Operations GmbH Sioc-linked, linear polydimethylsiloxane polyoxyalkylene block copolymers
EP3611215A1 (en) 2018-08-15 2020-02-19 Evonik Operations GmbH Method for producing acetoxy groups carrying siloxanes
EP3744755A1 (en) 2019-05-28 2020-12-02 Evonik Operations GmbH Method for producing siloxanes bearing acetoxy groups
EP3744759A1 (en) 2019-05-28 2020-12-02 Evonik Operations GmbH Method of manufacturing sioc linked polyether branched in siloxane section
EP3744756A1 (en) 2019-05-28 2020-12-02 Evonik Operations GmbH Acetoxy systems
ES2913783T3 (en) 2019-05-28 2022-06-06 Evonik Operations Gmbh Procedure for the purification of acetoxysiloxanes
EP3744774B1 (en) 2019-05-28 2021-09-01 Evonik Operations GmbH Method for recycling of silicones
EP3744754A1 (en) 2019-05-28 2020-12-02 Evonik Operations GmbH Method for producing siloxanes bearing acetoxy groups
EP3744760A1 (en) 2019-05-28 2020-12-02 Evonik Operations GmbH Method of manufacturing sioc linked polyether branched in siloxane section

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297431A (en) * 1965-06-02 1967-01-10 Standard Oil Co Cellarized metal and method of producing same
US3383207A (en) * 1967-01-03 1968-05-14 Gen Electric Method for making cellular material
US4013461A (en) * 1971-07-21 1977-03-22 Union Carbide Corporation High void porous sheet and process therefor
US3940262A (en) * 1972-03-16 1976-02-24 Ethyl Corporation Reinforced foamed metal
DE2362293A1 (en) * 1973-12-14 1975-06-19 Technical Operations Basel Sa Foamed or cellular metals prodn - from aluminium using titanium hydride, and reinforced with steel inclusions
JPH0317236A (en) 1989-06-14 1991-01-25 Nkk Corp Manufacture of foamed metal
WO1992021457A1 (en) 1991-05-31 1992-12-10 Alcan International Limited Process and apparatus for producing shaped slabs of particle stabilized foamed metal
DE4206303C1 (en) * 1992-02-28 1993-06-17 Mepura Metallpulver Ges.M.B.H., Ranshofen, At
DE19501508C1 (en) 1995-01-19 1996-04-25 Lemfoerder Metallwaren Ag Section of a vehicle wheel support
JP3352584B2 (en) 1996-03-11 2002-12-03 神鋼鋼線工業株式会社 Manufacturing method of metal foam
AT406027B (en) * 1996-04-19 2000-01-25 Leichtmetallguss Kokillenbau W METHOD FOR PRODUCING MOLDED PARTS FROM METAL FOAM
AT408076B (en) 1996-10-07 2001-08-27 Mepura Metallpulver METHOD FOR THE PRODUCTION OF FOAM METAL OR FOAM / METAL COMPOSITE MOLDED BODIES, SYSTEM FOR THE PRODUCTION AND USE THEREOF
DE59807606D1 (en) * 1997-06-10 2003-04-30 Goldschmidt Ag Th Foamable metal body
ATE208435T1 (en) * 1997-08-30 2001-11-15 Honsel Gmbh & Co Kg ALLOY FOR PRODUCING METAL FOAM BODIES USING A POWDER WITH NUCLEAR-FORMING ADDITIVES
DE19907855C1 (en) * 1999-02-24 2000-09-21 Goldschmidt Ag Th Manufacture of metal foams
EP1031634A1 (en) * 1999-02-24 2000-08-30 Goldschmidt AG Separation refining of metal melts by addition of metal hydrides, especially MgH2
EP1422303B1 (en) * 1999-06-23 2008-12-10 Grillo-Werke AG Method of producing metal foam bodies of Zn-alloys
JP4207218B2 (en) * 1999-06-29 2009-01-14 住友電気工業株式会社 Metal porous body, method for producing the same, and metal composite using the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02094483A2 *

Also Published As

Publication number Publication date
CA2443826A1 (en) 2002-11-28
DE50209776D1 (en) 2007-05-03
JP2004525265A (en) 2004-08-19
US6942716B2 (en) 2005-09-13
ATE357304T1 (en) 2007-04-15
EP1397223B1 (en) 2007-03-21
US20020170391A1 (en) 2002-11-21
JP4344141B2 (en) 2009-10-14
WO2002094483A3 (en) 2003-03-13
AU2002314016A1 (en) 2002-12-03
WO2002094483A2 (en) 2002-11-28
ES2281521T3 (en) 2007-10-01

Similar Documents

Publication Publication Date Title
EP1397223B1 (en) Production of metal foams
EP1031393B1 (en) Preparation of metal foams
Baumgärtner et al. Industrialization of powder compact toaming process
EP1915226B1 (en) Process for the powder metallurgy production of metal foam and of parts made from metal foam
EP1392875B1 (en) Method for producing metal/metal foam composite elements
EP1356131B1 (en) Method for the production of metallic foam and metal bodies produced according to said method
EP2044230B1 (en) Method for the production of metal foams
WO2002061160A2 (en) Production of flat, metallic integral foam
EP1017864B1 (en) Alloy for producing metal foamed bodies using a powder with nucleating additives
WO2019034506A1 (en) Copper-based alloy for the production of bulk metallic glasses
DE19813176C2 (en) Process for the production of composite parts
AT413344B (en) METHOD FOR PRODUCING METAL FOAM BODIES
DE19810979C2 (en) Aluminum alloy for the production of aluminum foam bodies using a powder with nucleating additives
EP1409407B1 (en) Production of mg2 si and ternary compounds mg2 (si,e); (e=ge, sn, pb and transition metals; smaller than 10 wt.%) made of mgh2 and silicon and the production of magnesium silicide moulded bodies by pulse-plasma-synthesis
EP1602739B1 (en) Method for recycling of light metal parts
EP1323616A1 (en) Vehicle steering wheel from foamed metal
EP1482062B1 (en) Foam casting method and pressure-tight closable die for the production of cast articles
DE10163489B4 (en) Flat, metallic integral foam
DE19802501C2 (en) Powder mixture for a sintered aluminum alloy and method for producing a sintered body from such a powder mixture
DE10104340A1 (en) Process for the production of metal foam and metal body produced thereafter
DE2357733A1 (en) Fibre reinforced ductile metal or alloy - prepd from a mixt of metal and fibre-forming substance which is compacted and hot deformed

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20031030

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KNOTT, WILFRIED

Inventor name: WEIER, ANDREAS

Inventor name: WINDBIEL, DAGMAR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GOLDSCHMIDT GMBH

17Q First examination report despatched

Effective date: 20051219

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: SI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50209776

Country of ref document: DE

Date of ref document: 20070503

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070430

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070821

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2281521

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: EVONIK GOLDSCHMIDT GMBH

BERE Be: lapsed

Owner name: GOLDSCHMIDT G.M.B.H.

Effective date: 20070430

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: EVONIK GOLDSCHMIDT GMBH

Effective date: 20071128

26N No opposition filed

Effective date: 20071227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070622

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070430

REG Reference to a national code

Ref country code: SI

Ref legal event code: SP73

Owner name: EVONIK GOLDSCHMIDT GMBH; DE

Effective date: 20090429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070321

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: EVONIK GOLDSCHMIDT GMBH

Free format text: GOLDSCHMIDT GMBH#GOLDSCHMIDTSTRASSE 100#45127 ESSEN (DE) -TRANSFER TO- EVONIK GOLDSCHMIDT GMBH#GOLDSCHMIDTSTRASSE 100#45127 ESSEN (DE)

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: EVONIK GOLDSCHMIDT GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20100426

Year of fee payment: 9

Ref country code: FR

Payment date: 20100506

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20100415

Year of fee payment: 9

Ref country code: DE

Payment date: 20100423

Year of fee payment: 9

Ref country code: IT

Payment date: 20100423

Year of fee payment: 9

Ref country code: NL

Payment date: 20100413

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20100423

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100420

Year of fee payment: 9

Ref country code: SE

Payment date: 20100415

Year of fee payment: 9

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20111101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110430

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 357304

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110502

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110430

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111101

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111101

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110430

REG Reference to a national code

Ref country code: SI

Ref legal event code: KO00

Effective date: 20111202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110430

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110430

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50209776

Country of ref document: DE

Effective date: 20111101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110501

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20131029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110501