WO1999006605A1 - Proceed de production d'elements constitutifs en materiaux composites et leur utilisation - Google Patents

Proceed de production d'elements constitutifs en materiaux composites et leur utilisation Download PDF

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Publication number
WO1999006605A1
WO1999006605A1 PCT/DE1998/002226 DE9802226W WO9906605A1 WO 1999006605 A1 WO1999006605 A1 WO 1999006605A1 DE 9802226 W DE9802226 W DE 9802226W WO 9906605 A1 WO9906605 A1 WO 9906605A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
base matrix
components
isa
powder
Prior art date
Application number
PCT/DE1998/002226
Other languages
German (de)
English (en)
Inventor
Alexander BÖHM
Bernd Kieback
Frank Meyer-Olbersleben
Volker GÜTHER
Roland Scholl
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Gfe Metalle Und Materialien 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 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Gfe Metalle Und Materialien Gmbh filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO1999006605A1 publication Critical patent/WO1999006605A1/fr

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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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • 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
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/047—Making non-ferrous alloys by powder metallurgy comprising intermetallic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a method for producing components from composite materials and their use, the properties of the composite material being adapted or optimized due to its composition, taking into account the respective area of use or location.
  • Such composite materials according to the invention are very particularly suitable for components which are exposed to high temperatures and / or under aggressive conditions which are normally corrosive and / or oxidative.
  • DE 44 18 598 AI discloses a process for the production of components from materials which are difficult to sinter with intermetallic phases, the disclosure content of which is also used for the solution according to the invention to be described below.
  • the procedure is such that a highly disperse powder mixture is produced by grinding at least one element powder and / or an alloy powder in an oxygen-free atmosphere in order to produce components from materials which are difficult to melt and sinter with intermetallic phases and closed porosity.
  • the intermetallic phase is only formed after grinding in a high-energy mill during conventional sintering.
  • a component produced in this way can, however, only be adapted to a limited extent to the actual requirements with regard to mechanical, thermal and chemical conditions of use, which is the case with the components known from DE 44 18 598, consisting in particular of suicides, in which reinforcing components are homogeneously distributed,
  • Components made of composite materials and taking into account locally differentiated requirements are produced as a composite material such that the component consists of a composite material which has a base matrix made of an intermetallic phase, in which at least one functional component is embedded.
  • the embedding takes place in such a way that a concentration gradient for the one or more functional component (s) is set over the cross section continuously or with a concentration that changes in layers, so that locally different requirements are met on the different sides of such a component can.
  • the composite material thus assembled is then subjected to a thermal treatment, e.g. pressure-free sintering, solidified into a component.
  • the starting powder as described in DE 44 18 598 AI, can be finely ground using a high-energy mill.
  • a wide variety of aluminides or suicides for example of the elements Mo, Ti, W, Zr, Fe, Nb, Ni and / or Ru, can be used for the base matrix of the composite material according to the invention.
  • a further modification of the base matrix can be done by the additional addition of metals, e.g. Cu, Fe, Ni, Al, Mg and / or Cr can be achieved.
  • Various functional components such as, for example, ZrO 2 , SiC, Y 2 O 3 , can be used for a silicide base matrix and are contained in the finished component and consequently distributed in a defined manner in the composite material produced according to the invention.
  • Components manufactured according to the invention can be used in many technical fields of application and in systems in which high temperatures, temperature differences occur and direct contact with corrosive media, such as e.g. Hot gas, in melts or other aggressive media, such as in the field of energy generation and conversion, in waste disposal
  • corrosive media such as e.g. Hot gas
  • melts or other aggressive media such as in the field of energy generation and conversion, in waste disposal
  • Such a composite material is, for example, one whose base matrix consists of MoSi 2 and has the functional components SiC and Zr ⁇ 2 , so that such a component can easily be used as a heat shield.
  • Another possible application is as a heater in high-temperature furnaces, whereby such a component in turn consists of MoSi 2 and ZrÜ 2 with a defined distribution.
  • the components thus produced in accordance with the invention can easily be used at temperatures up to approximately 2,000 ° C.
  • the components according to the invention can also be produced by reaction powder metallurgy based on element powder mixtures
  • ISA / EP which form the desired intermetallic phase during the pressure-free sintering.
  • the functional components can be distributed in the desired form in the material.
  • swelling effects occur which lead to a permanent porosity after the completion of the sintering.
  • the hot isostatic pressing process can be carried out within an encapsulation.
  • the cost of doing this is relatively high.
  • high densities can be achieved with components with a relatively simple geometry.
  • Complex shaped components on the other hand, can only be produced by expensive post-processing.
  • the composite materials for the components to be manufactured can be composed almost optimally in accordance with the respective requirement profile.
  • the setting of the requirement-specific concentration of the functional components via the cross section of such a component can be done, for example, using methods such as Powder spraying, sedimentation can be achieved.
  • the respective concentration can be varied in the range from 0 to 99% by volume over the cross section of the component.
  • the proportion of different functional components can increase or decrease starting from opposite sides of a component manufactured according to the invention, and the respective requirements can thus be taken into account.
  • reinforcement components are fibers which are particularly preferably resistant to high temperatures. Such fibers can consist, for example, of the most varied of known ceramic materials.
  • the one or more functional components can be formed in situ during the thermal treatment.
  • a matrix component can change into another intermetallic phase.
  • Figure 1 shows the cross section of a powder metallurgy heat shield.
  • the heat shield is adapted to different functions on the two left and right outer sides shown here.
  • the base matrix 1 is formed from oSi 2 .
  • On the right side are as functional components
  • SiC particles 3 are contained on the left-hand side as a further functional component for strengthening the base matrix in this area. The SiC particles 3 ensure increased corrosion resistance compared to the other side of the heat shield, which, in contrast, withstands a higher temperature load.
  • Such a heat shield can be ground using element powder mixtures which are stoichiometric in the ratio of 33.3 vol.% Mo and 66.7 vol.% Si in a planetary ball mill over a period of 6 h at 200 U / mm in a protective gas atmosphere , with hexane being used as grinding aid.
  • Two different powder mixtures Ml and M2 were produced from the millbase thus obtained.
  • the mixture Ml contains 10 vol.% SiC and the mixture M2 15 vol. Zr 2 .
  • the two mixtures are then compacted in layers by conventional matrix pressing at 600 MPa to form a material composite.
  • the green body obtained in this way is subsequently sintered at 1,600 ° C. in vacuo for a period of 1 h.
  • ISA / EP and Si are used, which are ground in a stoichiometric ratio of 33.3% by volume Mo and 66.7% by volume with the planetary ball mill for 6 hours at 200 rpm in a protective gas atmosphere.
  • the two different powder mixtures M3 and M4 obtained after grinding contain 50% by volume Zr0 2 for the mixture M3 and 10% by volume Zr0 2 , 10% by volume for the mixture M4.
  • the two mixtures are subsequently compressed by monostatic pressing in such a way that the mixture M3 forms the core and the mixture M4 the outer edge regions of a cylindrical body, that is to say its shell.
  • the green body prepared in this way can then be sintered at 1,800 ° C in a vacuum and, if necessary, subsequently subjected to further compaction by hot isostatic pressing.
  • the component produced according to the invention as a heater has the required thermal and electrical properties as a result of the functional components ZrÜ 2 and Y 2 O 3 contained in the composite material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un procédé de production d'éléments constitutifs en matériaux composites, selon lequel au moins un constituant fonctionnel est intercalé dans une matrice de base composée d'au moins une phase intermétallique, dont le gradient de concentration varie sur la section transversale en continu ou par couche. Le matériau composite est solidifié par traitement thermique pour donner lieu à l'élément constitutif.
PCT/DE1998/002226 1997-07-31 1998-07-29 Proceed de production d'elements constitutifs en materiaux composites et leur utilisation WO1999006605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19733098 1997-07-31
DE19733098.3 1997-07-31

Publications (1)

Publication Number Publication Date
WO1999006605A1 true WO1999006605A1 (fr) 1999-02-11

Family

ID=7837559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002226 WO1999006605A1 (fr) 1997-07-31 1998-07-29 Proceed de production d'elements constitutifs en materiaux composites et leur utilisation

Country Status (2)

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DE (1) DE19834216A1 (fr)
WO (1) WO1999006605A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE537113C2 (sv) * 2010-03-01 2015-01-20 Westinghouse Electric Sweden Bränslekomponent och förfarande för framställning av en bränslekomponent
SE536815C2 (sv) * 2010-03-01 2014-09-16 Westinghouse Electric Sweden Reaktorkomponent
SE536814C2 (sv) * 2010-03-01 2014-09-16 Westinghouse Electric Sweden Neutronabsorberande komponent och förfarande för framställning av en neutronabsorberande komponent

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004930A1 (fr) * 1985-02-22 1986-08-28 Dynamet Technology Inc. Alliage composite de titane/carbure de titane et procede de revetement par des poudres metalliques
EP0255954A2 (fr) * 1986-08-08 1988-02-17 National Aerospace Laboratories of Science & Technology Agency Procédé pour la préparation d'un matériau multicouche à gradient de composition
WO1996037635A1 (fr) * 1995-05-24 1996-11-28 Virginia Tech Intellectual Properties, Inc. Materiaux composites comprenant des elements de renfort de matrice metallique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004930A1 (fr) * 1985-02-22 1986-08-28 Dynamet Technology Inc. Alliage composite de titane/carbure de titane et procede de revetement par des poudres metalliques
EP0255954A2 (fr) * 1986-08-08 1988-02-17 National Aerospace Laboratories of Science & Technology Agency Procédé pour la préparation d'un matériau multicouche à gradient de composition
WO1996037635A1 (fr) * 1995-05-24 1996-11-28 Virginia Tech Intellectual Properties, Inc. Materiaux composites comprenant des elements de renfort de matrice metallique

Also Published As

Publication number Publication date
DE19834216A1 (de) 1999-02-04

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