US3736109A - Method of coating refractory metals for protection at high temperatures and resulting articles - Google Patents

Method of coating refractory metals for protection at high temperatures and resulting articles Download PDF

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Publication number
US3736109A
US3736109A US00125430A US3736109DA US3736109A US 3736109 A US3736109 A US 3736109A US 00125430 A US00125430 A US 00125430A US 3736109D A US3736109D A US 3736109DA US 3736109 A US3736109 A US 3736109A
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Prior art keywords
core
sheath
metal
barrier layer
platinum group
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Expired - Lifetime
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US00125430A
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English (en)
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A S Darling
G L Selman
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Johnson Matthey PLC
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Johnson Matthey PLC
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C03B5/1672—Use of materials therefor
    • C03B5/1675—Platinum group metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/018—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of a noble metal or a noble metal alloy
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C03B5/1672—Use of materials therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • Y10T428/12618—Plural oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12778—Alternative base metals from diverse categories
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12812—Diverse refractory group metal-base components: alternative to or next to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12875—Platinum group metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2942—Plural coatings
    • Y10T428/2949—Glass, ceramic or metal oxide in coating

Definitions

  • This specification describes an article for use at high temperature, for example in the glass industry, and comprises a refractory core made from niobium, tantalum, chromium, zirconium, vanadium, hafnium, rhenium or alloys thereof, a barrier layer of magnesia and a sheath of a platinum group metal or an alloy based on at least one metal of the platinum group.
  • the oxides of the core metal or all'oy are chosen to be less volatile than the oxides of molybdenum at operating temperatures within the range 1100" to 1500 C.
  • a core may also be made from tungsten or molybdenum and in such a case the barrier layer may contain a small quantity of vitreous material, for example borosilicate glass.
  • This invention relates to the sheathing of refractory metals with platinum group metals, or alloys based on at least one metal of the platinum group. (These alloys will be referred to as platinum base alloys.)
  • a barrier layer may be interposed between, for example, a core of niobium, tantalum or chromium and a sheath of a platinum base alloy.
  • the barrier layer may comprise:
  • refractory oxides i.e. oxides which are themselves refractory; not necessarily the oxides of refractory metals
  • refractory nitrides for example, boron nitride and silicon nitride
  • any other refractory compounds which are compatible at the operating temperatures of 1100 C. to 1500 C. with the two materials with which they come into contact.
  • the above items (a)(e) include compounds of the rare earth metals.
  • an article comprising a core and a sheath with an interfacial space therebetween in which the partial pressure of oxygen is reduced to a pressure below one micron, the core comprising tungsten or molybdenum or an alloy of tungsten and molybdenum, the sheath comprising a platinum group metal or an alloy based on at least one platinum group metal, and a barnier layer disposed between the core and the sheath to prevent contact between the core and the sheath.
  • the barrier layer may comprise one or more of the above mentioned refractory compounds in reference to the earlier application.
  • an article comprising a core of a base metal such as molybdenum or tungsten or an alloy thereof and a sheath enveloping the core and formed of a platinum group metal or an alloy based on at least one platinum group metal and having between the core and the sheath a barrier layer formed of a refractory material stable at high temperatures and compatible with, and inert with respect to, the core and sheath and preventing physical contact between them and having within the interfacial space between the core and the sheath an atmosphere of inert gas.
  • the barrier layer may, for example, be a refractory oxide, nitride or carbide which is compatible at high temperatures with both molybdenum and platinum.
  • a preferred inert gas is argon, but other suitable inert gases are nitrogen and helium.
  • gases are nitrogen and helium.
  • magnesia does not decompose under these conditions.
  • an article for use at high temperature comprises a refractory core made from niobium, tantalum, chromium, zirconium, vanadium, hafnium, rhenium or alloys thereof, a barrier layer of magnesia and a sheath of a platinum group metal or of an alloy based on at least one metal of the platinum group, in which the oxides of the core metal or alloy are less volatile than the oxides of molybdenum at operating temperatures between l and 1500- C.
  • Core metals satisfying this requirement are niobium, tantalum and chromium or alloys thereof.
  • Articles according to this invention may be used at temperatures of up to 1500 C. and 1600 C.
  • an article for use at high temperature comprises a core and a sheath with an interfacial space therebetween in which the partial pressure of oxygen is reduced to a pressure below one micron, the core comprising tungsten or molybdenum, the sheath comprising a platinum group metal or an alloy based on at least one platinum group metal, and a barrier layer of magnesia disposed between the core and the sheath to prevent contact between said core and sheath.
  • an article for use at high temperature comprises a core of a base metal such as molybdenum or tungsten or an alloy thereof and a sheath enveloping the core and formed of a platinum group metal or an alloy based on at least one platinum group metal and having between the core and the sheath a barrier layer of magnesia, preventing physical contact between them, and having within the interfacial space between the core and the sheath an atmosphere of inert gas.
  • a preferred inert gas is argon, but suitable inert gases are nitrogen and helium.
  • magnesia may be uniformly fiameor plasmasprayed on to the core material or the core material coated or alloyed with a getter material for the absorption of oxygen such as titanium, zirconium, hafnium, thorium, vanadium, niobium or tantalum.
  • a preferred getter is a coating of zirconium 0.003" thick flameor plasma-sprayed on the core material.
  • magnesia barrier layer is then flame or plasma-oversprayed to provide a further coating 0.010" thick.
  • Articles in this preferred form having a core of moldbdenum and an outer platinum sheath 0.020" thick have been found to have a life of over 2500 hours at an operating temperature of 1400 C. compared with a life of 2000 hours for a zirconia barrier layer.
  • a small quantity of a vitreous material such as a borosilicate glass, which behaves as a viscous material at temperatures above 1000 C. may be flame-or-plasma-sprayed with the magnesia in forming the barrier layer as we have found that this assists adhesion to the core, or getter coated core, material in instances where the core is made from tungsten, molybdenum or an alloy of tungsten and molybdenum.
  • thermocouple was run for 450 hours at 1650 C. in magnesia under purified argon. Recalibration at the palladium point indicated a decrease in output equivalent to 4 C., which, at this temperature cannot be considered a serious deterioration. Under similar conditions of test thermocouples immersed in alumina remain intact for a few hours only.
  • the core material (niobium, tantalum, chromium, zirconium, vanadium, hafnium, rhenium, molybdenum and tungsten or alloys thereof) is first coated with a layer of metallic magnesium by hot-dipping, galvanising or any other method.
  • the so-coated core is then encapsulated in the sheath material.
  • the encapsulated core is subjected to oxidation treatment so that the magnesium metal is oxidised in situ to magnesia. Oxidation may be carried out at moderately high temperatures by the use of steam or other oxidising atmospheres.
  • the ultimate barrier layer of magnesia may be obtained by, for example, first casting molten magnesium into the space between the sheath and the core prior to finally forming the sheath to encapsulate the so-formed core/barrier layer assembly.
  • Another alternative method includes pre-calcining thin sheets of magnesium metal which are tightly wrapped around the core prior to sheathing. The effect of oxidation will be to expand the barrier layer material so that it completely fills the space between the sheath and the core.
  • An article comprising a refractory core of metal or alloys made from niobium, tantalum, chromium, zirconium, vanadium, hafnium, or rhenium, a barrier layer of magnesia and a sheath of a platinum group metal or an alloy based on at least one metal of the platinum group in which the oxides of the core metal or alloy are less volatile than the oxides of molybdenum at operating temperatures between 1100 C. and 1500 C.
  • An article comprising a core and a sheath with an interfacial space therebetween in which the partial pressure of oxygen is reduced to a pressure below one micron, the core comprising tungsten or molybdenum, the sheath comprising a platinum group metal or an alloy based on at least one platinum group metal, and a barrier layer of magnesia disposed between the core and the sheath to prevent contact between said core and sheath.
  • An article comprising a core of a base metal of molybdenum or tungsten or an alloy thereof and a sheath enveloping the core and formed of a platinum group metal or an alloy based on at least one platinum group metal and having between the core and the sheath a barrier layer of magnesia, preventing physical contact between them, and having within the interfacial space between the core and the sheath an atmosphere of inert gas.
  • the core material has at least the major portion of its surface coated with a getter material selected from titanium, zirconium, hafnium, thorium, vanadium, niobium or tantalum.
  • vitreous material is borosilicate glass.
  • the core material has at least the major portion of its surface coated with a getter material selected from titanium, zirconium, hafnium, thorium, vanadium, niobium or tantalum.
  • barrier layer of magnesia is used with a getter material selected from titanium, zirconium, hafnium, thorium, vanadium, niobium or tantalum.
  • a method for making an article for use at high temperatures comprising coating a refractory core of metal or alloys made from niobium, tantalum, chromium, zirconium, vanadium, hafnium, or rhenium, with a barrier layer of magnesia and thereafter applying a sheath of a platinum group metal or an alloy based on at least one metal in the platinum group, in which the oxides of the core metal or alloy are less volatile than the oxides of molybdenum at operating temperatures between 1100 C. and 1500 C.
  • a method according to claim 13 including coating the core with a getter material selected from the group consisting of titanium, zirconium, hafnium, thorium, vanadium, niobium and tantalum, the getter material selected being different from the core material.
  • a method of making an article for use at high temperatures comprising providing a core and a sheath with an interfacial space therebetween in which the partial pressure of oxygen is reduced to a pressure below one micron, the core comprising a metal or alloys made from tungsten or molybdenum, the sheath comprising a platinum group metal or an alloy based on at least one plat- References Cited UNITED STATES PATENTS 5/1951 De Santis et al. 117-71 M X 8/1960 Hill 65-374 M X 6 3,031,331 4/1962 Aves, Jr.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Vapour Deposition (AREA)
  • Physical Vapour Deposition (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Coating With Molten Metal (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Surface Treatment Of Glass (AREA)
US00125430A 1970-03-20 1971-03-17 Method of coating refractory metals for protection at high temperatures and resulting articles Expired - Lifetime US3736109A (en)

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GB1359970 1970-03-20

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US (1) US3736109A (enrdf_load_stackoverflow)
JP (1) JPS5730672B1 (enrdf_load_stackoverflow)
CA (1) CA958509A (enrdf_load_stackoverflow)
CH (1) CH542287A (enrdf_load_stackoverflow)
DE (1) DE2113437A1 (enrdf_load_stackoverflow)
FR (1) FR2084651A5 (enrdf_load_stackoverflow)
GB (1) GB1352319A (enrdf_load_stackoverflow)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912488A (en) * 1974-07-25 1975-10-14 Johns Manville Electric furnace outlet
US3927223A (en) * 1972-05-11 1975-12-16 Asahi Glass Co Ltd Method of forming refractory oxide coatings
US4055699A (en) * 1976-12-02 1977-10-25 Scholl, Inc. Cold insulating insole
US4163736A (en) * 1971-06-16 1979-08-07 Johnson, Matthey & Co., Limited Method of producing platinum-clad articles
US4251254A (en) * 1978-05-18 1981-02-17 U.S. Philips Corporation Tools for the handling and shaping of glass
FR2492806A1 (fr) * 1980-10-27 1982-04-30 Owens Corning Fiberglass Corp Stratifies destines a venir en contact avec du verre fondu, leur procede de preparation et leur utilisation dans un appareil de production de fibres de verre
US4342577A (en) * 1980-10-27 1982-08-03 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4343636A (en) * 1981-04-20 1982-08-10 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4348216A (en) * 1980-10-27 1982-09-07 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4402719A (en) * 1980-10-27 1983-09-06 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4402718A (en) * 1980-10-27 1983-09-06 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4404009A (en) * 1982-12-22 1983-09-13 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4427428A (en) 1980-10-27 1984-01-24 Owens-Corning Fiberglas Corporation Feeder for forming glass fibers and method for making feeder
US4430105A (en) 1980-10-27 1984-02-07 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4447248A (en) * 1982-07-15 1984-05-08 Owens-Corning Fiberglas Corporation Method of making and using glass fiber forming feeders
DE3320980A1 (de) * 1983-06-10 1984-12-13 Schott Glaswerke Glasschmelzaggregat
US4629487A (en) * 1984-05-17 1986-12-16 Matsushita Electric Industrial Co., Ltd. Molding method for producing optical glass element
US4685948A (en) * 1985-02-08 1987-08-11 Matsushita Electric Industrial Co., Ltd. Mold for press-molding glass optical elements and a molding method using the same
US4721518A (en) * 1984-12-10 1988-01-26 Matsushita Electric Industrial Co., Ltd. Mold for press-molding glass elements
US4962070A (en) * 1985-10-31 1990-10-09 Sullivan Thomas M Non-porous metal-oxide coated carbonaceous fibers and applications in ceramic matrices
US5114797A (en) * 1990-05-10 1992-05-19 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Metal structural component having a heat insulating titanium fire inhibiting protective coating
US5125002A (en) * 1991-01-07 1992-06-23 Toledo Engineering Co., Inc. Furnace electrode protector
US5273833A (en) * 1989-12-20 1993-12-28 The Standard Oil Company Coated reinforcements for high temperature composites and composites made therefrom
AU650928B2 (en) * 1990-08-11 1994-07-07 Johnson Matthey Public Limited Company Coated article
US5484263A (en) * 1994-10-17 1996-01-16 General Electric Company Non-degrading reflective coating system for high temperature heat shields and a method therefor
US5752156A (en) * 1996-03-04 1998-05-12 General Atomics Stable fiber interfaces for beryllium matrix composites
US20050148255A1 (en) * 2002-01-15 2005-07-07 Doyle Mark L. Platinum metal based article for high temperature applications
US20050145960A1 (en) * 2003-12-16 2005-07-07 Habboosh Samir W. EMF sensor with protective sheath
CN101003192B (zh) * 2007-01-24 2010-05-19 秦国义 叠层复合弥散强化铂及铂合金
US20100187973A1 (en) * 2009-01-28 2010-07-29 Samsung Electronics Co., Ltd. Carbon fiber including carbon fiber core coated with dielectric film, and fiber-based light emitting device including the carbon fiber
CN102765228A (zh) * 2012-08-06 2012-11-07 重庆国际复合材料有限公司 铂钽层状复合材料及其制备方法
CN119489150A (zh) * 2025-01-20 2025-02-21 中钨稀有金属新材料(湖南)有限公司 一种钽钨合金热锻加工方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8000480L (sv) * 1979-02-01 1980-08-02 Johnson Matthey Co Ltd Artikel lemplig for anvendning vid hoga temperaturer
HU185198B (en) * 1982-01-28 1984-12-28 Egyesuelt Izzolampa Current inlet particularly for vacuumtechnical devices
US4446199A (en) * 1982-07-30 1984-05-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Overlay metallic-cermet alloy coating systems
US4451496A (en) * 1982-07-30 1984-05-29 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Coating with overlay metallic-cermet alloy systems
JPH02115662A (ja) * 1988-10-25 1990-04-27 Matsushita Electric Ind Co Ltd 多室式一体型空気調和機
GB9405934D0 (en) * 1994-03-25 1994-05-11 Johnson Matthey Plc Coated article

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163736A (en) * 1971-06-16 1979-08-07 Johnson, Matthey & Co., Limited Method of producing platinum-clad articles
US3927223A (en) * 1972-05-11 1975-12-16 Asahi Glass Co Ltd Method of forming refractory oxide coatings
US3912488A (en) * 1974-07-25 1975-10-14 Johns Manville Electric furnace outlet
US4055699A (en) * 1976-12-02 1977-10-25 Scholl, Inc. Cold insulating insole
US4251254A (en) * 1978-05-18 1981-02-17 U.S. Philips Corporation Tools for the handling and shaping of glass
WO1982001510A1 (en) * 1980-10-27 1982-05-13 Owens Corning Fiberglass Corp Articles for contacting molten glass
US4427428A (en) 1980-10-27 1984-01-24 Owens-Corning Fiberglas Corporation Feeder for forming glass fibers and method for making feeder
US4342577A (en) * 1980-10-27 1982-08-03 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
FR2492806A1 (fr) * 1980-10-27 1982-04-30 Owens Corning Fiberglass Corp Stratifies destines a venir en contact avec du verre fondu, leur procede de preparation et leur utilisation dans un appareil de production de fibres de verre
US4348216A (en) * 1980-10-27 1982-09-07 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4402719A (en) * 1980-10-27 1983-09-06 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4402718A (en) * 1980-10-27 1983-09-06 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4430105A (en) 1980-10-27 1984-02-07 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4343636A (en) * 1981-04-20 1982-08-10 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
US4447248A (en) * 1982-07-15 1984-05-08 Owens-Corning Fiberglas Corporation Method of making and using glass fiber forming feeders
US4404009A (en) * 1982-12-22 1983-09-13 Owens-Corning Fiberglas Corporation Method and apparatus for forming glass fibers
DE3320980A1 (de) * 1983-06-10 1984-12-13 Schott Glaswerke Glasschmelzaggregat
US4629487A (en) * 1984-05-17 1986-12-16 Matsushita Electric Industrial Co., Ltd. Molding method for producing optical glass element
US4721518A (en) * 1984-12-10 1988-01-26 Matsushita Electric Industrial Co., Ltd. Mold for press-molding glass elements
US4685948A (en) * 1985-02-08 1987-08-11 Matsushita Electric Industrial Co., Ltd. Mold for press-molding glass optical elements and a molding method using the same
US4962070A (en) * 1985-10-31 1990-10-09 Sullivan Thomas M Non-porous metal-oxide coated carbonaceous fibers and applications in ceramic matrices
US5273833A (en) * 1989-12-20 1993-12-28 The Standard Oil Company Coated reinforcements for high temperature composites and composites made therefrom
US5114797A (en) * 1990-05-10 1992-05-19 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Metal structural component having a heat insulating titanium fire inhibiting protective coating
AU650928B2 (en) * 1990-08-11 1994-07-07 Johnson Matthey Public Limited Company Coated article
EP0471505B1 (en) * 1990-08-11 1996-10-02 Johnson Matthey Public Limited Company Coated article, its use and method of making the same
US5125002A (en) * 1991-01-07 1992-06-23 Toledo Engineering Co., Inc. Furnace electrode protector
US5484263A (en) * 1994-10-17 1996-01-16 General Electric Company Non-degrading reflective coating system for high temperature heat shields and a method therefor
US5545437A (en) * 1994-10-17 1996-08-13 General Electric Company Method for forming a non-degrading refective coating system for high temperature heat shields
US5752156A (en) * 1996-03-04 1998-05-12 General Atomics Stable fiber interfaces for beryllium matrix composites
US20050148255A1 (en) * 2002-01-15 2005-07-07 Doyle Mark L. Platinum metal based article for high temperature applications
US20050145960A1 (en) * 2003-12-16 2005-07-07 Habboosh Samir W. EMF sensor with protective sheath
US7611280B2 (en) * 2003-12-16 2009-11-03 Harco Laboratories, Inc. EMF sensor with protective sheath
CN101003192B (zh) * 2007-01-24 2010-05-19 秦国义 叠层复合弥散强化铂及铂合金
US20100187973A1 (en) * 2009-01-28 2010-07-29 Samsung Electronics Co., Ltd. Carbon fiber including carbon fiber core coated with dielectric film, and fiber-based light emitting device including the carbon fiber
US8679626B2 (en) * 2009-01-28 2014-03-25 Samsung Electronics Co., Ltd. Carbon fiber including carbon fiber core coated with dielectric film, and fiber-based light emitting device including the carbon fiber
CN102765228A (zh) * 2012-08-06 2012-11-07 重庆国际复合材料有限公司 铂钽层状复合材料及其制备方法
CN119489150A (zh) * 2025-01-20 2025-02-21 中钨稀有金属新材料(湖南)有限公司 一种钽钨合金热锻加工方法

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FR2084651A5 (enrdf_load_stackoverflow) 1971-12-17
DE2113437A1 (de) 1971-10-07
JPS5730672B1 (enrdf_load_stackoverflow) 1982-06-30
CA958509A (en) 1974-12-03
CH542287A (fr) 1973-09-30
GB1352319A (en) 1974-05-08

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