EP0351847A3 - Modular segmented cathode plasma generator - Google Patents

Modular segmented cathode plasma generator Download PDF

Info

Publication number
EP0351847A3
EP0351847A3 EP19890113342 EP89113342A EP0351847A3 EP 0351847 A3 EP0351847 A3 EP 0351847A3 EP 19890113342 EP19890113342 EP 19890113342 EP 89113342 A EP89113342 A EP 89113342A EP 0351847 A3 EP0351847 A3 EP 0351847A3
Authority
EP
European Patent Office
Prior art keywords
modular
anode
cathodes
powder feed
arc chambers
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.)
Withdrawn
Application number
EP19890113342
Other languages
German (de)
French (fr)
Other versions
EP0351847A2 (en
Inventor
Masamichi Koga
Koichi Takeda
Tsuyoshi Shinoda
Erich Muehlberger
Albert Sickinger
Stephan Erich Muehlberger
Don Everett Bailey
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0351847A2 publication Critical patent/EP0351847A2/en
Publication of EP0351847A3 publication Critical patent/EP0351847A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/44—Plasma torches using an arc using more than one torch
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/137—Spraying in vacuum or in an inert atmosphere
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/28—Cooling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma Technology (AREA)
  • Nozzles (AREA)

Abstract

A supersonic plasma system in which a vacuum source creates a low static pressure environment within an enclosure containing a plasma gun (16) and a workpiece (24) has plural cathodes (84, 86, 88) of sealed, modular constructicn in conjunction with a common anode, to provide higher levels of operating power and other advantages which flow from a segmented cathode gun configuration. Inert gas independently introduced into the plural cathodes (84, 86, 88) undergoes swirling notion over the cathode tips. The anode is of modular construction for easy replacement in order to change the configuration of a nozzle, a plu­ rality of arc chambers receiving the plural cathodes or a central mixing chamber between the nozzle and the arc chambers within the anode and coupled to a central powder feed (72). The powder feed includes a replaceable insert which includes at least one and preferably a plurality of powder feed ports into the various arc chambers. Alternatively, metal which has already been heated to a molten state can be fed directly into the central mixing chamber. The modular cathodes which are independently powered by separate D.C. power sources (99A, 99B, 99C) are also independently cooled by separate cooling water systems as is the common anode. The cooling systems are configured to produce swirling of the cooling water so that cooling action is maximized.
EP19890113342 1988-07-21 1989-07-20 Modular segmented cathode plasma generator Withdrawn EP0351847A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22250788A 1988-07-21 1988-07-21
US222507 1998-12-29

Publications (2)

Publication Number Publication Date
EP0351847A2 EP0351847A2 (en) 1990-01-24
EP0351847A3 true EP0351847A3 (en) 1991-03-20

Family

ID=22832511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890113342 Withdrawn EP0351847A3 (en) 1988-07-21 1989-07-20 Modular segmented cathode plasma generator

Country Status (2)

Country Link
EP (1) EP0351847A3 (en)
JP (1) JPH0766872B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247152A (en) * 1991-02-25 1993-09-21 Blankenship George D Plasma torch with improved cooling
US5556558A (en) * 1994-12-05 1996-09-17 The University Of British Columbia Plasma jet converging system
AU2003221300A1 (en) * 2002-03-28 2003-10-13 Apit Corp. S.A. Atmospheric plasma surface treatment method and device for same
JP2005085917A (en) 2003-09-08 2005-03-31 Sharp Corp Plasma treatment apparatus
JP5515277B2 (en) * 2008-11-04 2014-06-11 株式会社日本セラテック Plasma spraying equipment
CN105682334B (en) * 2016-02-03 2018-11-20 中国科学技术大学先进技术研究院 A kind of plasma arc reactor device
CN107124814A (en) * 2017-06-20 2017-09-01 四川大学 A kind of many negative electrode laminar flow plasma powder spheroidization devices
DE102019126640A1 (en) * 2019-10-02 2021-04-08 Gebr. Heller Maschinenfabrik Gmbh Arc wire spraying device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823302A (en) * 1972-01-03 1974-07-09 Geotel Inc Apparatus and method for plasma spraying
US3839618A (en) * 1972-01-03 1974-10-01 Geotel Inc Method and apparatus for effecting high-energy dynamic coating of substrates
WO1986002024A1 (en) * 1984-09-27 1986-04-10 Regents Of The University Of Minnesota Multiple arc plasma device with continuous gas jet
FR2611340A1 (en) * 1987-02-24 1988-08-26 Pechiney Aluminium Multicathode plasma generator including cathode screening
EP0297637A1 (en) * 1987-06-30 1989-01-04 Technische Universiteit Eindhoven Method of treating surfaces of substrates with the aid of a plasma and a reactor for carrying out the method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517556A (en) * 1974-07-08 1976-01-21 Rikiichi Kimata Keifunnadono mushiukikansoho
JPS61230300A (en) * 1985-04-05 1986-10-14 プラズマ技研工業株式会社 Torch for plasma arc

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823302A (en) * 1972-01-03 1974-07-09 Geotel Inc Apparatus and method for plasma spraying
US3839618A (en) * 1972-01-03 1974-10-01 Geotel Inc Method and apparatus for effecting high-energy dynamic coating of substrates
WO1986002024A1 (en) * 1984-09-27 1986-04-10 Regents Of The University Of Minnesota Multiple arc plasma device with continuous gas jet
FR2611340A1 (en) * 1987-02-24 1988-08-26 Pechiney Aluminium Multicathode plasma generator including cathode screening
EP0297637A1 (en) * 1987-06-30 1989-01-04 Technische Universiteit Eindhoven Method of treating surfaces of substrates with the aid of a plasma and a reactor for carrying out the method

Also Published As

Publication number Publication date
JPH02256200A (en) 1990-10-16
JPH0766872B2 (en) 1995-07-19
EP0351847A2 (en) 1990-01-24

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