EP0884123A2 - Corps métallique moussable - Google Patents

Corps métallique moussable Download PDF

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Publication number
EP0884123A2
EP0884123A2 EP98109728A EP98109728A EP0884123A2 EP 0884123 A2 EP0884123 A2 EP 0884123A2 EP 98109728 A EP98109728 A EP 98109728A EP 98109728 A EP98109728 A EP 98109728A EP 0884123 A2 EP0884123 A2 EP 0884123A2
Authority
EP
European Patent Office
Prior art keywords
gas
metal
blowing agent
releasing
semi
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
EP98109728A
Other languages
German (de)
English (en)
Other versions
EP0884123B1 (fr
EP0884123A3 (fr
Inventor
Wilfried Dr. Knott
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 Goldschmidt 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7831969&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0884123(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by TH Goldschmidt AG, Goldschmidt GmbH filed Critical TH Goldschmidt AG
Publication of EP0884123A2 publication Critical patent/EP0884123A2/fr
Publication of EP0884123A3 publication Critical patent/EP0884123A3/fr
Application granted granted Critical
Publication of EP0884123B1 publication Critical patent/EP0884123B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22F3/1121—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

Definitions

  • the invention relates to a method for producing foamable metal body, the compact semi-finished product available in this way, the use of the semi-finished product for foaming a closed cell Metal body and the closed cell obtained in this way foam-shaped metal body.
  • EP-B-0 460 392 describes a process for the production foamable metal body with mostly closed porosity, with the resulting pores evenly throughout the metal body distributed and should have a uniform size, in which a mixture of at least one metal powder and at least one gas-releasing blowing agent powder and compacted into a semi-finished product.
  • the one described here The method is characterized in that the hot compaction at a temperature above the decomposition temperature of the blowing agent takes place, the connection of the Metal powder particles predominantly done by diffusion and at a pressure high enough to disintegrate the Prevent blowing agent in such a way that the metal particles are in a firm connection with each other and one represent a gas-tight seal for the gas particles of the blowing agent.
  • DE-C-41 24 591 describes a process for the production foamable metal body by rolling a powder mixture, at which contains the powder mixture of at least one blowing agent Powder and a metal powder, in which the powder mixture is filled into a metal hollow profile and rolled.
  • Cold pressing bodies obtainable according to this publication cannot only be heated before the rolling process, but also after individual roll passes are reheated. Here too the Cold pressed body to a temperature above the decomposition temperature of the blowing agent heated.
  • DE-A-44 26 627 relates to a metallic composite material and a process for its manufacture.
  • the metallic one Composite material with a core of one or more porous Metal materials and at least one top layer made of solid Material points between the core and the top layer / top layers metallic bonds.
  • the object of the present invention consists in one improved process for the production of foamable metal bodies and secondly in an improvement in technical Properties of the semi-finished products as well as the closed cell foam-shaped metal body compared to the prior art.
  • the first-mentioned object of the present invention is achieved by a process for producing foamable metal bodies, in which a mixture of at least one metal powder and one gas-releasing blowing agent produced and a semi-finished product is compacted.
  • the method is characterized in that a gas-releasing blowing agent containing magnesium hydride starts.
  • the chemical compound "magnesium hydride” has long been State of the art. However, in the area of manufacturing foamable metal body previously other gas-releasing blowing agents, for example titanium hydride, carbonates, hydrates or easily evaporating substances used. Meanwhile, however Magnesium hydride is no longer just a laboratory product, but also commercially available on a larger scale.
  • a core of the present The invention thus consists of magnesium hydride to supply new use for the production of foamable metal bodies. If you apply metal powder, for example thorough mixing with a small amount of magnesium hydride containing blowing agent and compacted the thus obtained Mixture, so it is possible to manufacture compacts to obtain foam-shaped metal bodies.
  • the so available foam-shaped metal bodies have a very homogeneous pore density distribution down to the surface areas of the molded body on which is a significant advance over foam-like Represents metal bodies with known gas-releasing Blowing agents of the prior art can be obtained.
  • magnesium hydride especially autocatalytic Magnesium hydride produced, containing blowing agent metallic foam bodies have a different type Morphology as foams, for example with titanium hydride be obtained as a gas-releasing blowing agent.
  • the aluminum foam piece is in use of magnesium hydride according to the present invention in the Fig. 1 foamed significantly more uniformly.
  • the compression of the Bottom is only about 3 mm thick, while the aluminum foam according to the state of the art up to 1 cm unfoamed Material can be found at the bottom.
  • inventive Metal foam is also the number of cells per unit volume significantly larger, preferably with regard to for the presence of small cells. Also in this foam to detect a certain irregularity in the cells, which, however, is significantly less pronounced than with the foam according to the state of the art.
  • the surface of the foam according to The present invention has more openings than that of the Foam according to the prior art. But the openings are significantly finer and significantly more even.
  • one Plastic foam can be used for the purposes of the present invention speak of small, uniform blow-offs.
  • all fusible metals or metal alloys foamable in the sense of the present invention are as metal powder Aluminum and its alloys used. Accordingly it is particularly preferred that the metal powder is substantially made of aluminum, optionally with conventional alloy components, such as magnesium, copper and / or silicon.
  • Metal powder is available to the person skilled in the art in a wide variety of processes to disposal.
  • Particularly preferred in the sense of the present Invention is cold pressing, the cold isostatic Pressing, rolling, extrusion and extrusion.
  • Especially preferred in the sense of the present invention Compacting below the decomposition temperature of the magnesium hydride containing gas-releasing blowing agent, preferably carried out at room temperature. While in the prior art usually compacting at high temperature, especially above the decomposition temperature of the gas-releasing Propellant was carried out in the invention Use of gas-releasing propellants containing magnesium hydride found that compacting even at low Temperatures is possible.
  • the mixture of metal powder and Magnesium hydride containing gas-releasing blowing agent When compacting, the mixture of metal powder and Magnesium hydride containing gas-releasing blowing agent the highest possible density can be compressed. Particularly preferred within the meaning of the present invention is the compacting in such a way that the density at least 90%, in particular at least 95% of the theoretical density of the Metal of the metal powder is. This can be caused by high pressing forces can be achieved. So by applying 0.5% magnesium hydride as a blowing agent from spray-atomized spherical Aluminum (AlMgSi 6061) by cold isostatic pressing a cylinder with a pre-pressure of 450 bar accordingly a pressing force of about 10 t with a density of more than 90% of the theoretical density of aluminum can be produced.
  • AlMgSi 6061 spray-atomized spherical Aluminum
  • the amount of magnesium hydride to be used according to the invention containing gas-releasing blowing agent is usually very low.
  • the proportions of blowing agent are of the order of magnitude usually from a few tenths of a percent by weight because that compacted semi-finished product is fully compressed and propellant cannot escape.
  • Amounts of blowing agent have proven to be particularly favorable from 0.1 to 2% by weight, in particular 0.2 to 1 wt .-%, based on the metal powder, proven.
  • magnesium hydride used itself, the commercially available is.
  • known ones can also be used Metal hydrides, for example titanium hydride, carbonates, for example Calcium carbonate, potassium carbonate, sodium carbonate, Sodium bicarbonate, hydrates, for example aluminum sulfate hydrate, Alum, aluminum hydroxide or easily evaporating Substances, for example mercury compounds or powdered organic substances are used.
  • Another embodiment of the present invention comprises the semi-finished products obtainable by compacting, in which the metal particles in a relatively firm connection with each other are and an essentially gastight seal form for the gas particles of the blowing agent.
  • These semi-finished products can optionally by known methods are formed to this under appropriate pressure and temperature conditions according to known methods to a closed cell Foam metal body. So can the foaming of the semi-finished product, if no final shape is specified is. Alternatively, the foaming can also be carried out in one partially or completely closed form, where the finished porous metal body the given shape of the tool assumes.
  • the conditions for foaming the semi-finished products are skilled in the art from the state mentioned in the introduction Technology known.
  • Another embodiment of the present invention above also relates to those obtainable using the above method closed-cell foam-shaped metal body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Laminated Bodies (AREA)
EP98109728A 1997-06-10 1998-05-28 Corps métallique moussable Expired - Lifetime EP0884123B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724326 1997-06-10
DE19724326 1997-06-10

Publications (3)

Publication Number Publication Date
EP0884123A2 true EP0884123A2 (fr) 1998-12-16
EP0884123A3 EP0884123A3 (fr) 2001-04-04
EP0884123B1 EP0884123B1 (fr) 2003-03-26

Family

ID=7831969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109728A Expired - Lifetime EP0884123B1 (fr) 1997-06-10 1998-05-28 Corps métallique moussable

Country Status (6)

Country Link
US (1) US5972285A (fr)
EP (1) EP0884123B1 (fr)
JP (1) JPH1112605A (fr)
AT (1) ATE235336T1 (fr)
DE (1) DE59807606D1 (fr)
ES (1) ES2193439T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031635A1 (fr) * 1999-02-24 2000-08-30 Goldschmidt AG Magnésium métallique activé
WO2002094483A3 (fr) * 2001-05-19 2003-03-13 Goldschmidt Ag Th Production de mousses metalliques
AT412876B (de) * 2003-08-05 2005-08-25 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Schäumbares halbzeug und verfahren zur herstellung von metallteilen mit innerer porosität
EP2143809A1 (fr) * 2008-06-11 2010-01-13 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Alliage en aluminium pour mousses métalliques, leur utilisation et procédé de fabrication
US20110111250A1 (en) * 2009-11-10 2011-05-12 Ken Evans Process for producing a foamed metal article
WO2023061853A1 (fr) * 2021-10-11 2023-04-20 HAVEL metal foam GmbH Procédé et dispositif pour la production d'une ébauche de tôle métallique en poudre pressée en forme de bande, apte à former une mousse, au moyen d'un laminage à froid, et ébauche de tôle métallique en poudre pressée

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AT408317B (de) * 1998-04-09 2001-10-25 Mepura Metallpulver Verfahren zur herstellung von schaummetall-formkörpern
DE19907855C1 (de) * 1999-02-24 2000-09-21 Goldschmidt Ag Th Herstellung von Metallschäumen
NL1014116C2 (nl) * 2000-01-19 2001-07-20 Corus Aluminium Walzprod Gmbh Werkwijze en inrichting voor het vormen van een laminaat van gecomprimeerd metaalpoeder met een schuimmiddel tussen twee metaallagen, en daarmee gevormd produkt.
DE10024776C1 (de) 2000-05-19 2001-09-06 Goldschmidt Ag Th Verwendung von Metallhydrid-behandeltem Zink in der metallorganischen Synthese
EP1186748A1 (fr) * 2000-09-05 2002-03-13 Siemens Aktiengesellschaft Aube de rotor pour une turbomachine et turbomachine
DE10045494C2 (de) * 2000-09-13 2002-07-18 Neue Materialien Fuerth Gmbh Verfahren zum Herstellen eines Formkörpers aus Metallschaum
US6733722B2 (en) * 2000-09-13 2004-05-11 Neue Materialien Furth Gmbh Method for producing a moulded body from foamed metal
DE10104338A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Herstellung flächiger, metallischer Integralschäume
US6915834B2 (en) * 2001-02-01 2005-07-12 Goldschmidt Ag Process for producing metal foam and metal body produced using this process
US6706239B2 (en) 2001-02-05 2004-03-16 Porvair Plc Method of co-forming metal foam articles and the articles formed by the method thereof
DE10123899A1 (de) * 2001-05-16 2002-11-21 Goldschmidt Ag Th Verfahren zur Herstellung von Metallformteilen
US6660224B2 (en) * 2001-08-16 2003-12-09 National Research Council Of Canada Method of making open cell material
US7108828B2 (en) * 2001-08-27 2006-09-19 National Research Council Of Canada Method of making open cell material
JP3706071B2 (ja) * 2002-01-15 2005-10-12 株式会社エルモ社 撮像装置
US7067208B2 (en) * 2002-02-20 2006-06-27 Ion America Corporation Load matched power generation system including a solid oxide fuel cell and a heat pump and an optional turbine
US6852273B2 (en) * 2003-01-29 2005-02-08 Adma Products, Inc. High-strength metal aluminide-containing matrix composites and methods of manufacture the same
US7328831B1 (en) 2004-06-25 2008-02-12 Porvair Plc Method of making a brazed metal article and the article formed thereby
US7699092B2 (en) * 2007-06-18 2010-04-20 Husky Injection Molding Systems Ltd. Metal-molding system and process for making foamed alloy
US7931997B2 (en) * 2008-03-12 2011-04-26 Bloom Energy Corporation Multi-material high temperature fuel cell seals
US8623569B2 (en) 2008-12-09 2014-01-07 Bloom Energy Corporation Fuel cell seals
CA2713560C (fr) * 2010-08-23 2019-10-29 Jangofish Holdings Inc. Procede et methode de production de metaux expansibles
US8968509B2 (en) 2013-05-09 2015-03-03 Bloom Energy Corporation Methods and devices for printing seals for fuel cell stacks
DE102014209408A1 (de) 2014-05-19 2015-11-19 Evonik Degussa Gmbh Ethoxylatherstellung unter Verwendung hoch aktiver Doppelmetallcyanid-Katalysatoren
LT3168273T (lt) 2015-11-11 2018-09-10 Evonik Degussa Gmbh Polimerai, galintys sudaryti skersinius ryšius
EP3321304B1 (fr) 2016-11-15 2019-06-19 Evonik Degussa GmbH Mélanges de siloxanes ramifiés-cycliques de type d/t et leurs produits secondaires
EP3415548B1 (fr) 2017-06-13 2020-03-25 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés par sic
EP3415547B1 (fr) 2017-06-13 2020-03-25 Evonik Operations GmbH Procédé de fabrication de polyéthersiloxanes liés par sic
EP3438158B1 (fr) 2017-08-01 2020-11-25 Evonik Operations GmbH Production de polyéthersiloxanes par une liaison sioc
EP3467006B1 (fr) 2017-10-09 2022-11-30 Evonik Operations GmbH Mélanges de siloxanes ramifiés-cycliques de type d/t et leurs produits secondaires
EP3611215A1 (fr) 2018-08-15 2020-02-19 Evonik Operations GmbH Procédé de production de siloxanes portant des groupes acétoxy
EP3611214A1 (fr) 2018-08-15 2020-02-19 Evonik Operations GmbH Copolymères bloc polydiméthylsiloxane-polyoxyalkylène linéaires à liaisons sioc
CN109550963A (zh) * 2018-12-13 2019-04-02 华南理工大学 一种用于3d打印的亚微米氢化物颗粒增强铝基粉体的制备方法
CN110142402B (zh) * 2019-06-03 2022-01-25 东睦新材料集团股份有限公司 一种粉末冶金铝基材料及其制备方法
CN110216275B (zh) * 2019-06-03 2022-01-25 东睦新材料集团股份有限公司 一种粉末冶金铝基材料及其制备方法
CN110216276B (zh) * 2019-06-03 2022-01-25 东睦新材料集团股份有限公司 一种粉末冶金铝基材料及其制备方法
KR102676331B1 (ko) * 2022-01-12 2024-06-17 부산대학교 산학협력단 알루미늄 발포체의 제조방법

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DE4124591C1 (en) * 1991-01-21 1993-02-11 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De Foamable metal body prodn. with reduced density differences - by charging hollow section with mixt. of powder contg. expanding agent and metal powder, and precompacting
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1031635A1 (fr) * 1999-02-24 2000-08-30 Goldschmidt AG Magnésium métallique activé
WO2002094483A3 (fr) * 2001-05-19 2003-03-13 Goldschmidt Ag Th Production de mousses metalliques
AT412876B (de) * 2003-08-05 2005-08-25 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Schäumbares halbzeug und verfahren zur herstellung von metallteilen mit innerer porosität
EP2143809A1 (fr) * 2008-06-11 2010-01-13 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Alliage en aluminium pour mousses métalliques, leur utilisation et procédé de fabrication
US20110111250A1 (en) * 2009-11-10 2011-05-12 Ken Evans Process for producing a foamed metal article
US20110111251A1 (en) * 2009-11-10 2011-05-12 Ken Evans Process for producing a foamed metal article and process for producing a foamable metal precursor
WO2023061853A1 (fr) * 2021-10-11 2023-04-20 HAVEL metal foam GmbH Procédé et dispositif pour la production d'une ébauche de tôle métallique en poudre pressée en forme de bande, apte à former une mousse, au moyen d'un laminage à froid, et ébauche de tôle métallique en poudre pressée

Also Published As

Publication number Publication date
EP0884123B1 (fr) 2003-03-26
US5972285A (en) 1999-10-26
EP0884123A3 (fr) 2001-04-04
DE59807606D1 (de) 2003-04-30
ES2193439T3 (es) 2003-11-01
ATE235336T1 (de) 2003-04-15
JPH1112605A (ja) 1999-01-19

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