EP1097769A1 - Procedé de fabrication d'un produit ou préform d'une alliage à base d'argent renforcée par dispersion - Google Patents

Procedé de fabrication d'un produit ou préform d'une alliage à base d'argent renforcée par dispersion Download PDF

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Publication number
EP1097769A1
EP1097769A1 EP00123511A EP00123511A EP1097769A1 EP 1097769 A1 EP1097769 A1 EP 1097769A1 EP 00123511 A EP00123511 A EP 00123511A EP 00123511 A EP00123511 A EP 00123511A EP 1097769 A1 EP1097769 A1 EP 1097769A1
Authority
EP
European Patent Office
Prior art keywords
silver
powder
strength
matrix material
grinding process
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.)
Ceased
Application number
EP00123511A
Other languages
German (de)
English (en)
Inventor
Uta Grundmann
Martin Heilmaier
Ludwig Schultz
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.)
Institut fuer Festkoerper und Werkstofforschung Dresden eV
Original Assignee
Institut fuer Festkoerper und Werkstofforschung Dresden eV
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 Institut fuer Festkoerper und Werkstofforschung Dresden eV filed Critical Institut fuer Festkoerper und Werkstofforschung Dresden eV
Publication of EP1097769A1 publication Critical patent/EP1097769A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1084—Alloys containing non-metals by mechanical alloying (blending, milling)
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the invention relates to a method for producing Semi-finished products and moldings made of particle-reinforced Silver-based materials via powder metallurgy mechanical alloying.
  • the producible with the process Products are, for example, in electrical engineering Contact materials can be used.
  • Mechanical alloying also makes it possible Silver due to particles with an insoluble in the matrix Cation component (of the oxide used, carbide or nitrides). In contrast, tend to be in-situ formed particles because of the increased diffusivity and Solubility of the mentioned cation component independently from their thermodynamic stability to coarsening at high stress and consolidation temperatures.
  • the invention has for its object the manufacture of Semi-finished products and moldings made of particle-reinforced Silver-based materials via powder metallurgy mechanical alloys so that the middle Diameter of those distributed in the matrix material strength-increasing particles is less than 100 nm. there should have a low gas content and a high one at the same time Powder yield can be guaranteed.
  • This object is achieved according to the invention in that Silver or silver alloy powder as matrix material and powdery, increasing the strength of the matrix material Particles together in an intensive grinding process Temperatures below -10 ° C are subjected. After that this powder is pressed in a manner known per se and sintering into semi-finished or shaped articles.
  • the grinding vessel is used during the Cooling process or between the cooling stages.
  • Coolant is preferably liquid nitrogen.
  • the grinding process is advantageously carried out until the strength-increasing particles with a medium Particle size of ⁇ 50 nm are present.
  • the particles can consist of carbides, borides, oxides and / or Nitrides exist.
  • SiC, WC, Mo 2 C, VC, NbC, TaC and / or TiC can preferably be used as carbides, ZrB 2 , W 2 B 5 and / or TiB 2 as borides, CaO, Cr 2 O 3 , Y 2 O 3 as oxides , ZrO 2 , TiO 2 , Al 2 O 3 and / or CeO 2 and as nitrides BN, Si 3 N 4 , ZrN, TiN and / or CrN can be used.
  • the silver or Silver alloy powder 1 to 10 vol.% Of strength-increasing Particles are added.
  • the invention is based on an embodiment explained in more detail.
  • the subsequent grinding process was gradually every 45 min interrupted and then the grinding bowl cooled again to -165 ° C. After 15 h, the CaO particles had an average size of ⁇ 7 nm homogeneously distributed in the silver matrix.
  • the powder obtained was at 350 ° C in a hot press Vacuum and a pressure of 250 MPa to a relative density compacted from 98-99% to form bodies. Then the Shaped body sintered at 630 ° C and 200 MPa.
  • the molded articles produced in this way have a yield strength R p0.2 of 243 MPa and an electrical conductivity of 59.9 MS / m.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Powder Metallurgy (AREA)
EP00123511A 1999-11-04 2000-10-27 Procedé de fabrication d'un produit ou préform d'une alliage à base d'argent renforcée par dispersion Ceased EP1097769A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19953780A DE19953780C1 (de) 1999-11-04 1999-11-04 Verfahren zur Herstellung von Halbzeug und Formkörpern aus partikelverstärkten Silberbasiswerkstoffen
DE19953780 1999-11-04

Publications (1)

Publication Number Publication Date
EP1097769A1 true EP1097769A1 (fr) 2001-05-09

Family

ID=7928365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00123511A Ceased EP1097769A1 (fr) 1999-11-04 2000-10-27 Procedé de fabrication d'un produit ou préform d'une alliage à base d'argent renforcée par dispersion

Country Status (2)

Country Link
EP (1) EP1097769A1 (fr)
DE (1) DE19953780C1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081612A (zh) * 2015-09-22 2015-11-25 山东大学 一种用于热作模具的等离子弧堆焊合金粉末
CN105728733A (zh) * 2016-02-26 2016-07-06 龙岩学院 一种用机械合金化制备纳米Co-CeO2复合粉的方法
CN110904361A (zh) * 2019-12-16 2020-03-24 王爱平 等离子喷涂用镍基合金复合粉末及熔覆涂层的制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841804B1 (fr) * 2002-07-04 2005-02-18 Propension Procede de synthese d'un materiau composite metal-ceramique a durete renforcee et materiau obtenu par ce procede
DE10245343A1 (de) * 2002-09-27 2004-04-08 Robert Bosch Gmbh Elektrischer Kontakt
US9096917B2 (en) 2011-03-08 2015-08-04 Hublot Sa, Genève Composite material comprising a precious metal, manufacturing process and use of such material
CN110923496A (zh) * 2019-11-07 2020-03-27 西安理工大学 一种AgZrB2电触头材料及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090874A (en) * 1975-06-06 1978-05-23 Ford Motor Company Method for improving the sinterability of cryogenically-produced iron powder
EP0370180A1 (fr) * 1988-09-26 1990-05-30 Ishikawajima-Harima Heavy Industries Co., Ltd. Procédé et installation pour produire des particules d'hafnium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322666A (en) * 1992-03-24 1994-06-21 Inco Alloys International, Inc. Mechanical alloying method of titanium-base metals by use of a tin process control agent
DE4418600C2 (de) * 1994-05-27 1997-03-20 Fraunhofer Ges Forschung Verfahren zur Herstellung von dispersionsverstärkten metallischen Werkstoffen, insbesondere Kupfer und Silber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090874A (en) * 1975-06-06 1978-05-23 Ford Motor Company Method for improving the sinterability of cryogenically-produced iron powder
EP0370180A1 (fr) * 1988-09-26 1990-05-30 Ishikawajima-Harima Heavy Industries Co., Ltd. Procédé et installation pour produire des particules d'hafnium

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"High temperature deformation behaviour of mechanically alloyed microcrystalline ODS silver.", SCRIPTA MATERIALIA (1 JULY 1997) VOL.37, NO.1, P.103-9. 13 REFS. DOC. NO.: S1359-6462(97)00059-6 PUBLISHED BY: ELSEVIER FOR BOARD OF DIRECTORS OF ACTA METALL PRICE: CCCC 1359-6462/97/$17.00+.00 CODEN: SCRMBU ISSN: 1359-6462 SICI: 1359-6462(19970701)3, XP002161025 *
GRUNDMANN, U. (INSTITUT FUR FESTKORPER- UND WERKSTOFFORSCHUNG DRESDEN) ET AL: "Deformation behaviour of oxide-dispersion-strengthened silver.", MATERIALS SCIENCE AND ENGINEERING A (1997) A234-236, 505-508, PHOTOMICROGRAPHS, GRAPHS, 11 REF.. SWITZERLAND CONFERENCE: 11TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS, PRAGUE, CZECH REPUBLIC, 25-29 AUG. 1997 ISSN: 0921-5093, XP002161024 *
XU, J. (LOUISIANA STATE UNIVERSITY) ET AL: "Nanocrystalline Ag formed by low-temperature high-energy mechanical attrition.", NANOSTRUCTURED MATERIALS (JAN.-FEB. 1997) 8, (1), 91-100, DIFFRACTION PATTERNS, PHOTOMICROGRAPHS, NUMERICAL DATA, GRAPHS, 22 REF. ISSN: 0965-9773, XP002161023 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081612A (zh) * 2015-09-22 2015-11-25 山东大学 一种用于热作模具的等离子弧堆焊合金粉末
CN105728733A (zh) * 2016-02-26 2016-07-06 龙岩学院 一种用机械合金化制备纳米Co-CeO2复合粉的方法
CN110904361A (zh) * 2019-12-16 2020-03-24 王爱平 等离子喷涂用镍基合金复合粉末及熔覆涂层的制备方法

Also Published As

Publication number Publication date
DE19953780C1 (de) 2001-04-12

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