US3801367A - Coated wire and method - Google Patents

Coated wire and method Download PDF

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Publication number
US3801367A
US3801367A US00303153A US3801367DA US3801367A US 3801367 A US3801367 A US 3801367A US 00303153 A US00303153 A US 00303153A US 3801367D A US3801367D A US 3801367DA US 3801367 A US3801367 A US 3801367A
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US
United States
Prior art keywords
copper
borate
approximately
solution
coating
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
US00303153A
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English (en)
Inventor
G Blair
M Elam
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.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Application granted granted Critical
Publication of US3801367A publication Critical patent/US3801367A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • H01B3/082—Wires with glass or glass wool
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/005—Coating with enamels or vitreous layers by a method specially adapted for coating special objects
    • 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]

Definitions

  • ABSTRACT This invention is directed to a method of coating cop per with a flexible borate glaze and the product 0btained thereby.
  • FIG. I is a partial schematic view diagrammatically illustrating our method of applying a borate coating to copper.
  • FIG. 2 is a top view of the structural arrangement of FIG. I in partial cross-section illustrating the relative arrangement of the heating elements in relation to the vapor coating chamber.
  • Bottom end 21 of quartz tube 12 is critically situated above the level of solution 19 at a distance which, combined with the constriction in slot 11, results in a deficient oxygen concentration within the tube.
  • the reduced oxygen content allows the copper surface to oxidize to Cu O. It is important to prevent the copper from oxidizing to CuO because this greatly impairs the adhesion of the resultant borate coating.
  • FIG. 1 illustrates an embodiment of this invention utilizing two furnaces end on end
  • other furnace arrangements may be utilized provided they are capable of heating the copper in a short distance to red hot temperature in an atmosphere of steam, entrained sodium borate, and deficient oxygen. Due to the heat transfer property of copper, it is approximately at a dull red heat when it is quenched in solution 19.
  • the manner for passing the copper through the zone will vary depending upon the nature of the product. Unless it is intended to change the length and shape of the product, heating and pulling 0f the copper must be controlled so that the copper does not reach the softening point. Otherwise, it will'be torn under stress.
  • quartz tube 12 eventually has a vapor consisting essentially of steam and entrained sodium borate and as previously noted, a deficient oxygen supply.
  • the copper surface is oxidized to Cu O, it reacts with the entrained sodium borate to form borate glass, having an approximate formula of Cuo.Na B.,O This glass coating is increased as the copper passes through the saturated borax solution 19.
  • Thetreated copper is drawn through borax solution 19 over pulleys 24, 25, and 26 by means not shown, passed through a spray rinse (not shown) and wiped dry (not shown).
  • the thickness of the coating on the wire, tape, etc. will be on the order of 0.1 mil to about 0.2 mil after a single path through the furnace and solution. If needed, the thickness can be increased by multiple passes.
  • FIG. 2 shows the relative arrangements of restricted opening 11, quartz tube 12, upper furnace l3, ceramic wire carrier 22, heater wires 15, and lead 23.
  • the size of restricted opening 11 andthe diameter of quartz tube 12 will vary somewhat, primarily depending upon the shape of the copper piece being treated.
  • the opening should-be large enough to allow the cop per piece to slide through with ease and narrow enough to prevent an effective chimney effect from sweeping through the length of quartz tube 12. This is necessary to retard the amount of oxygen entering the tube at the lower end. There will, however, be some chimney effect at the upper end and the outgoing gases from slot 11 will effectively reduce the amount of oxygen entering through that slot.
  • Quartz tube 12 in this case, will preferably have a diameter of approximately 1% inches, a length of approximately 2 feet, and bottom end 20 will be approximately one-eighth inch to about one-fourth inch above the level of solution 19. Under these conditions, the tape will be drawn into the quartz tube at a rate from about 10 feet per minute to about 60 feet per minute. The rate will depend to some extent on the thickness of the copper in that the thicker copper needs a longer residence time to reach red heat.
  • coated copper products of the present invention are particularly useful for selenoid windings for traveling wave tubes.
  • a method of coating copper with copper borate glass comprising the steps of:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Resistance Heating (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Insulated Conductors (AREA)
US00303153A 1972-10-30 1972-10-30 Coated wire and method Expired - Lifetime US3801367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30315372A 1972-10-30 1972-10-30

Publications (1)

Publication Number Publication Date
US3801367A true US3801367A (en) 1974-04-02

Family

ID=23170751

Family Applications (1)

Application Number Title Priority Date Filing Date
US00303153A Expired - Lifetime US3801367A (en) 1972-10-30 1972-10-30 Coated wire and method

Country Status (6)

Country Link
US (1) US3801367A (ja)
JP (1) JPS5512101B2 (ja)
DE (1) DE2352063C3 (ja)
FR (1) FR2204710B1 (ja)
GB (1) GB1402067A (ja)
IT (1) IT1000099B (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5614261A (en) * 1992-06-05 1997-03-25 Wirelube Research Company Predrawing treatment system
US11247936B2 (en) 2016-04-20 2022-02-15 Upterior, Llc Metal-glass macrocomposites and compositions and methods of making

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012106273A1 (de) * 2012-07-12 2014-01-16 Helmut Längerer Verfahren zum Herstellen einer hochvakuumdichten Verbindung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5614261A (en) * 1992-06-05 1997-03-25 Wirelube Research Company Predrawing treatment system
US11247936B2 (en) 2016-04-20 2022-02-15 Upterior, Llc Metal-glass macrocomposites and compositions and methods of making
US11746044B2 (en) 2016-04-20 2023-09-05 Upterior, Llc Metal-glass macrocomposites and compositions and methods of making

Also Published As

Publication number Publication date
FR2204710B1 (ja) 1978-02-24
DE2352063C3 (de) 1975-10-02
FR2204710A1 (ja) 1974-05-24
GB1402067A (en) 1975-08-06
DE2352063A1 (de) 1974-05-22
IT1000099B (it) 1976-03-30
JPS5512101B2 (ja) 1980-03-29
JPS4976918A (ja) 1974-07-24
DE2352063B2 (de) 1975-02-20

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