EP0848070B1 - Warmfester Platinwerkstoff - Google Patents

Warmfester Platinwerkstoff Download PDF

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Publication number
EP0848070B1
EP0848070B1 EP97116610A EP97116610A EP0848070B1 EP 0848070 B1 EP0848070 B1 EP 0848070B1 EP 97116610 A EP97116610 A EP 97116610A EP 97116610 A EP97116610 A EP 97116610A EP 0848070 B1 EP0848070 B1 EP 0848070B1
Authority
EP
European Patent Office
Prior art keywords
platinum
hafnium
und
alloy
weight
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.)
Expired - Lifetime
Application number
EP97116610A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0848070A1 (de
Inventor
Manfred Dr. Poniatowski
Gerhard Reber
Stefan Zeuner
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.)
Umicore AG and Co KG
Original Assignee
DMC2 Degussa Metals Catalysts Cerdec AG
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 DMC2 Degussa Metals Catalysts Cerdec AG filed Critical DMC2 Degussa Metals Catalysts Cerdec AG
Publication of EP0848070A1 publication Critical patent/EP0848070A1/de
Application granted granted Critical
Publication of EP0848070B1 publication Critical patent/EP0848070B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal

Definitions

  • the invention relates to a heat-resistant platinum material, which contains at least 99.5% by weight of platinum and rare earths.
  • Heat-resistant platinum materials are used for many purposes Can be used in industry and in the laboratory, where special Mechanical, thermal and chemical requirements Persistence.
  • a special area of application is the glass melting technology, where platinum crucibles and -Construction parts increasingly for manufacturing high purity and homogeneous optical glasses for Flat screens, television tubes, PC monitors and Proven glass fibers.
  • Manufacturing routes have also been followed which are based on the conventional melting metallurgy based and with try alloying measures, a Grain size stabilization and structural hardening too to reach. Basically you use a combination the mechanisms of precipitation hardening (Dispersion hardening through species-specific, but thermally unstable particles), mixed crystal hardening and Grain boundary segregations.
  • US-A-5 518 691 describes a platinum material with the following composition: 0.01-1% Ti, Zr, Hf or rare earth metals, balance Pt.
  • GB-A-1 238 013 describes a platinum alloy with up to 20 atom% La, Sc, V, Y, Zr, Hf and Ta, rest Pt.
  • the Material 0.1 to 0.4 wt.% Hafnium and a total of 0.1 to 0.4% by weight yttrium and / or lanthanum and / or gadolinium,
  • the rest contains at least 99.5% by weight of platinum.
  • the material preferably contains at least 99.5 % By weight of platinum 0.2 to 0.4% by weight of hafnium and a total of 0.15 up to 0.3% by weight of yttrium and / or lanthanum and / or gadolinium.
  • the mode of action of the hafnium additive is based on a Solid-solution strengthening of platinum and an increase in Solubility limit for the elements yttrium, gadolinium and Lanthanum. Concentrations below 0.1% by weight show in this Regarding no noticeable impact, additions of more than 0.4% by weight hafnium (in conjunction with the other ternaries Additives) deteriorate the desired properties.
  • Precipitation hardening is based on the formation of stable intermetallic phases such as YPt 3 , YPt 5 , GdPt 5 , GdPt 2 , LaPt 5 , LaPt 2 , HfPt 3 and HfPt 5 . It has been shown that at concentrations> 0.4% by weight of hafnium the solubility in the solid state is clearly exceeded and these phases already appear as relatively coarse particles (> 10 ⁇ m) during solidification. These have a significantly negative impact on creep rupture strength. Additional amounts of ⁇ 0.1% by weight result in a significantly lower volume fraction of the precipitation phase and thus also an undesirable drop in strength.
  • hafnium is added better values in terms of creep rupture strength 1200 ° C than with the same amounts of the known Additional element zirconium with otherwise identical contents Rare Earth. It has been found that the intermetallic phases of hafnium with platinum and Rare earths are more stable than that of zirconium and that Hafnium gives platinum a higher basic strength.
  • Examples 2 and 13 are particularly interesting. They differ only in that the alloy according to 2) contains 0.25% by weight hafnium and the alloy according to 13) contains 0.25% by weight zirconium instead of hafnium.
  • the zirconium-containing platinum alloy has a considerably lower creep rupture strength than the hafnium-containing ones.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Insulated Conductors (AREA)
  • Thermistors And Varistors (AREA)
  • Inorganic Insulating Materials (AREA)
  • Catalysts (AREA)
  • Powder Metallurgy (AREA)
EP97116610A 1996-12-13 1997-09-24 Warmfester Platinwerkstoff Expired - Lifetime EP0848070B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19651850 1996-12-13
DE19651850A DE19651850A1 (de) 1996-12-13 1996-12-13 Warmfester Platinwerkstoff

Publications (2)

Publication Number Publication Date
EP0848070A1 EP0848070A1 (de) 1998-06-17
EP0848070B1 true EP0848070B1 (de) 2001-08-29

Family

ID=7814575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97116610A Expired - Lifetime EP0848070B1 (de) 1996-12-13 1997-09-24 Warmfester Platinwerkstoff

Country Status (5)

Country Link
EP (1) EP0848070B1 (ja)
JP (1) JP3803479B2 (ja)
AT (1) ATE204920T1 (ja)
DE (2) DE19651850A1 (ja)
ES (1) ES2164287T3 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001049364A (ja) * 2000-07-03 2001-02-20 Kazuo Ogasa 硬質貴金属合金部材とその製造方法
DE10046456C2 (de) * 2000-09-18 2003-04-10 Heraeus Gmbh W C Durch feinverteilte, kleine Teilchen aus Unedelmetalloxid dispersionsverfestigter, goldfreier Platin-Werkstoff

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758549A1 (de) * 1967-06-28 1971-02-11 Johnson Matthey Co Ltd Metall-Legierungen,die Metalle der Platingruppe enthalten,sowie Verfahren zum Herstellen dieser Legierungen
GB1238013A (ja) * 1967-06-28 1971-07-07
US5518691A (en) * 1993-07-29 1996-05-21 Tanaka Kikinzoku Kogyo K.K. Precious metal material

Also Published As

Publication number Publication date
JP3803479B2 (ja) 2006-08-02
EP0848070A1 (de) 1998-06-17
ES2164287T3 (es) 2002-02-16
DE59704436D1 (de) 2001-10-04
JPH10195561A (ja) 1998-07-28
DE19651850A1 (de) 1998-06-18
ATE204920T1 (de) 2001-09-15

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