EP0887432A2 - Pulvérisation à plasma améliorée - Google Patents

Pulvérisation à plasma améliorée Download PDF

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Publication number
EP0887432A2
EP0887432A2 EP98303270A EP98303270A EP0887432A2 EP 0887432 A2 EP0887432 A2 EP 0887432A2 EP 98303270 A EP98303270 A EP 98303270A EP 98303270 A EP98303270 A EP 98303270A EP 0887432 A2 EP0887432 A2 EP 0887432A2
Authority
EP
European Patent Office
Prior art keywords
plasma
reaction chamber
plasma jet
gas
reactive gas
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Withdrawn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
EP98303270A
Other languages
German (de)
English (en)
Other versions
EP0887432A3 (fr
Inventor
Omar Al-Sabouni
Geoffrey Kenneth Creffield
Mark Andrew Cole
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.)
BOC Group Ltd
Original Assignee
BOC Group Ltd
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 BOC Group Ltd filed Critical BOC Group Ltd
Publication of EP0887432A2 publication Critical patent/EP0887432A2/fr
Publication of EP0887432A3 publication Critical patent/EP0887432A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C23C4/134—Plasma spraying

Definitions

  • the present invention relates to the plasma spraying of a substrate with a coating or coatings which exhibit enhanced properties of hardness and/or wear resistance.
  • Conventional plasma spraying involves injecting powder particles typically in the range of 20 - 150 ⁇ m into a plasma arc generated by a plasma gun or torch. The powder particles become molten or partially molten and are accelerated towards the substrate to be coated. Impact with the substrate causes the powder particles to solidify rapidly and coalesce to form a coating.
  • US Patent No 5217747 discloses an apparatus for the plasma spraying of a substrate which includes a reaction chamber at one end of which is located a d.c. plasma torch. Means is provided for the supply of a plasma forming gas under pressure to the torch such that a plasma jet is produced which extends along the length of the reaction chamber. Aluminium powder is introduced into the plasma jet adjacent the plasma torch.
  • an apparatus for the plasma spraying of a substrate comprises a reaction chamber at or adjacent one end of which is located an anode electrode and space therefrom a cathode electrode, means for applying a direct current between the electrodes, means for supplying a plasma forming gas under pressure between the electrodes such that, in use a plasma jet is produced which extends along the length of the reaction chamber from the said one end, means for supplying a powder material into the plasma jet and further means for injecting a reactive gas into the plasma jet.
  • the reactive gas is a hydrocarbon, for example, methane.
  • the powder material is a mixture of 80% nickel and 20% chromium by weight.
  • the powder material is an alloy of M, Cr, Al, Y where M is a metal selected from nickel, cobalt, an alloy of nickel/cobalt or iron.
  • an apparatus 1 for use in the coating of a substrate 2 includes a reaction chamber 3 having one or more through ports 4 arranged at or adjacent the left hand end (as shown) of the reaction chamber 3 for the passage therethrough of a reactive gas.
  • the reaction chamber 3 is attached to a plasma spray gun or torch at its left hand end (as shown) which plasma spray gun includes an anode electrode 5 and a cathode electrode 6.
  • the anode electrode 5 is formed as a nozzle and a direct current power source (not shown) connects the electrodes 5, 6 in a manner known per se.
  • An inlet port 8 is provided in the gun for the passage therethrough of powder material again as known per se.
  • a reaction chamber 3 was attached to a Miller Thermal Inc. model SG-100 plasma gun and the following table illustrates the spraying parameters.
  • M Cr Al Y are alloys of chromium, aluminium and yttrium together with another metal, for example, nickel, cobalt, an alloy of these or iron.
  • the reactive gas, that is methane reduces the possibility of oxide formation and may promote the formation of carbides.
  • the reaction chamber is a consumable, made essentially of graphite.
  • the reaction chamber 3 it has been found necessary still to inject a reaction gas through the ports 4.
  • Tables III and IV illustrate the manner in which the oxide content of air sprayed plasma coatings is reduced by the injection of a reaction gas into the reaction chamber 3.
  • REACTIVE PLASMA Ni - Cr No Reactive Gas With Reactive Gas B
  • B A Oxygen (Wt %) 1.4 1.5 0.14 0.16 Hardness (Vickers) 212 206 452
  • A 10cm
  • B 15cm

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP98303270A 1997-06-19 1998-04-28 Pulvérisation à plasma améliorée Withdrawn EP0887432A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9712801.1A GB9712801D0 (en) 1997-06-19 1997-06-19 Improved plasma spraying
GB9712801 1997-06-19

Publications (2)

Publication Number Publication Date
EP0887432A2 true EP0887432A2 (fr) 1998-12-30
EP0887432A3 EP0887432A3 (fr) 1999-01-20

Family

ID=10814479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98303270A Withdrawn EP0887432A3 (fr) 1997-06-19 1998-04-28 Pulvérisation à plasma améliorée

Country Status (3)

Country Link
EP (1) EP0887432A3 (fr)
CA (1) CA2237116A1 (fr)
GB (1) GB9712801D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6428600B1 (en) 1999-09-22 2002-08-06 Flurschuetz Walter Process for producing spheroidized hard material powder
US20130157040A1 (en) * 2011-12-14 2013-06-20 Christopher A. Petorak System and method for utilization of shrouded plasma spray or shrouded liquid suspension injection in suspension plasma spray processes
CN109847673A (zh) * 2017-11-30 2019-06-07 中国石油化工股份有限公司 一种电弧等离子体反应器及重油轻质化方法
CN114786804A (zh) * 2020-01-22 2022-07-22 韩国核融合能源研究院 导电性粉末的等离子体表面处理装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014383A (en) * 1962-10-08 1965-12-22 British Oxygen Co Ltd Hard metal deposits
DE2155217A1 (de) * 1971-11-06 1973-05-10 Philips Patentverwaltung Verfahren zur herstellung dielektrischer und/oder photoleitfaehiger schichten fuer den elektrostatischen druck bzw. elektrophotographie
FR2234382A1 (en) * 1973-06-22 1975-01-17 Metallisation Ste Nouvelle Partially oxidised molybdenum coatings - deposited using plasma torch to give a surface of increased coefft of friction
EP0051869A1 (fr) * 1980-11-08 1982-05-19 Metallisation Limited Procédés de projection de revêtements métalliques et dispositifs pour leur excécution
EP0246828A1 (fr) * 1986-05-18 1987-11-25 Daido Tokushuko Kabushiki Kaisha Objets en titanium ou en alliage de titanium résistant à l'usure
WO1990013681A1 (fr) * 1989-05-04 1990-11-15 Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V. Procede pour appliquer un materiau ceramique
WO1992019784A1 (fr) * 1991-04-25 1992-11-12 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede et installation pour la formation de depot metallique par projection a l'arc electrique
DE4339345A1 (de) * 1993-11-18 1995-05-24 Difk Deutsches Inst Fuer Feuer Verfahren zum Auftragen einer Hartstoffschicht mittels Plasmaspritzen
US5592927A (en) * 1995-10-06 1997-01-14 Ford Motor Company Method of depositing and using a composite coating on light metal substrates
WO1997013884A1 (fr) * 1995-10-06 1997-04-17 Ford Motor Company Limited Procede pour deposer des revetements metalliques composites

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014383A (en) * 1962-10-08 1965-12-22 British Oxygen Co Ltd Hard metal deposits
DE2155217A1 (de) * 1971-11-06 1973-05-10 Philips Patentverwaltung Verfahren zur herstellung dielektrischer und/oder photoleitfaehiger schichten fuer den elektrostatischen druck bzw. elektrophotographie
FR2234382A1 (en) * 1973-06-22 1975-01-17 Metallisation Ste Nouvelle Partially oxidised molybdenum coatings - deposited using plasma torch to give a surface of increased coefft of friction
EP0051869A1 (fr) * 1980-11-08 1982-05-19 Metallisation Limited Procédés de projection de revêtements métalliques et dispositifs pour leur excécution
EP0246828A1 (fr) * 1986-05-18 1987-11-25 Daido Tokushuko Kabushiki Kaisha Objets en titanium ou en alliage de titanium résistant à l'usure
WO1990013681A1 (fr) * 1989-05-04 1990-11-15 Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V. Procede pour appliquer un materiau ceramique
WO1992019784A1 (fr) * 1991-04-25 1992-11-12 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede et installation pour la formation de depot metallique par projection a l'arc electrique
DE4339345A1 (de) * 1993-11-18 1995-05-24 Difk Deutsches Inst Fuer Feuer Verfahren zum Auftragen einer Hartstoffschicht mittels Plasmaspritzen
US5592927A (en) * 1995-10-06 1997-01-14 Ford Motor Company Method of depositing and using a composite coating on light metal substrates
WO1997013884A1 (fr) * 1995-10-06 1997-04-17 Ford Motor Company Limited Procede pour deposer des revetements metalliques composites

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
G.M.HERTERICK: "gas selection in plasma spraying" WELDING JOURNAL, vol. 66, no. 2, February 1987, pages 27-30, XP002085707 miami,fl,usa *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6428600B1 (en) 1999-09-22 2002-08-06 Flurschuetz Walter Process for producing spheroidized hard material powder
US20130157040A1 (en) * 2011-12-14 2013-06-20 Christopher A. Petorak System and method for utilization of shrouded plasma spray or shrouded liquid suspension injection in suspension plasma spray processes
CN109847673A (zh) * 2017-11-30 2019-06-07 中国石油化工股份有限公司 一种电弧等离子体反应器及重油轻质化方法
CN109847673B (zh) * 2017-11-30 2021-09-07 中国石油化工股份有限公司 一种电弧等离子体反应器及重油轻质化方法
CN114786804A (zh) * 2020-01-22 2022-07-22 韩国核融合能源研究院 导电性粉末的等离子体表面处理装置

Also Published As

Publication number Publication date
GB9712801D0 (en) 1997-08-20
EP0887432A3 (fr) 1999-01-20
CA2237116A1 (fr) 1998-12-19

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