EP0444394A2 - Matière céramique pour le revêtement par projection - Google Patents

Matière céramique pour le revêtement par projection Download PDF

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Publication number
EP0444394A2
EP0444394A2 EP91100015A EP91100015A EP0444394A2 EP 0444394 A2 EP0444394 A2 EP 0444394A2 EP 91100015 A EP91100015 A EP 91100015A EP 91100015 A EP91100015 A EP 91100015A EP 0444394 A2 EP0444394 A2 EP 0444394A2
Authority
EP
European Patent Office
Prior art keywords
weight
coating material
spray
ceramic
mold
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Withdrawn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
EP91100015A
Other languages
German (de)
English (en)
Other versions
EP0444394A3 (en
Inventor
Nobuhiro Sugitani
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.)
Sugitani Kinzoku Kogyo KK
Original Assignee
Sugitani Kinzoku Kogyo KK
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 Sugitani Kinzoku Kogyo KK filed Critical Sugitani Kinzoku Kogyo KK
Publication of EP0444394A2 publication Critical patent/EP0444394A2/fr
Publication of EP0444394A3 publication Critical patent/EP0444394A3/en
Withdrawn legal-status Critical Current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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • C23C4/11—Oxides

Definitions

  • the present invention relates to a ceramic spray coating material comprising zirconia and yttria.
  • porous ceramic layer spray-coated on the inner surface of a mold may be peeled off in long term runs of 30.000 shots or more of casting, and therefore, it has been desired to provide a further increased bonding force to the metal spray-coated layer.
  • the present invention provides a ceramic spray-coating material comprising zirconia and yttria, wherein the purity of a mixture of zirconia and yttria is 99,6% by weight or more.
  • the ceramic spray-coating material according to the present invention has an excellent bonding force, as compared to the prior art material.
  • the composition of the ceramic spray-coating material according to the present invention comprises 98 to 85 % by weight of ZrO2 and 2 to 15 % by weight of Y2O3.
  • the particles of the spray-coating material may be of an average particle size in a range of 20 to 40 ⁇ m, but an average particle size in a range of 10 to 50 ⁇ m is particularly desirable.
  • a ceramic layer formed of such spray-coating material serves to eliminate a gas during casting and in addition thereto, to considerably improve the heat resistance and durability of the mold.
  • the thickness of such layer is in a range of 50 to 500 ⁇ m.
  • the ceramic spray-coating material according to the present invention will now be described as being used, by way of an example, in a convenient production of a discontinuous casting mold of a copper alloy.
  • An Ni-plating layer is formed on an inner surface of the copper alloy mold in an usual manner to a thickness of 50 to 300 ⁇ m, preferably 100 to 200 ⁇ m. If necessary, a powder alloy of Ni/Co/Cr/Y as described in Japanese Patent application No.
  • 89/228343 corresponding to European Patent application 90110605.4-2106, now published as EP-A-0400683, may be applied onto the Ni-plating layer, with cooling with a water-cooling device provided within the mold, to a thickness of 50 to 600 ⁇ m, preferably 200 to 300 ⁇ m by plasma spray-coating at a temperature of about 10.000 to about 5.000 °C or by jet coating at a temperature of about 2.700 °C. Then, a ceramic coating layer of the above-described composition with a high purity (of 99,6 % by weight or more) is applied to a thickness of 50 to 500 ⁇ m, preferably 200 to 300 ⁇ m by a spray coating under a similar condition.
  • a large number of open pores are produced in the ceramic layer and render the ceramic layer porous.
  • the pores providing the porosity are of a size small as they can be observed by a microscope, rather than a size as large as they will cause a ruggedness on a surface of a molded product.
  • the copper alloy mold made in this manner has the porous ceramic layer having open pores which serve to contain a gas generated during casting and to guide the gas outside and hence, any adverse affection due to the gas cannot be exerted to the surface of a molded product. In other words, no blow (ruggedness) is produced.
  • the mold When the ceramic layer is employed in a copper alloy mold, the mold has higher durability and wear resistance, which enables the number of runs of casting corresponding to the number of shots, approximately 30 to 50 % more than the number of runs of 30.000 shots when a lower purity ceramic layer is used, e.g., 40.000 shots or more, without need for applying a soft facing material to the inner surface of the mold.
  • Ni-plating layer having a thickness of 200 ⁇ m is provided, by electro-plating, on an inner surface of a mold made of a copper alloy containing 0,15 % by weight of zirconium and having a coefficient of thermal conductivity of 7. Then, an alloy comprising 57,55 % by weight of Ni, 25 % by weight of Co, 17 % by weight of Cr and 0,45 % by weight of Y is spray-coated at 8.000 °C by a plasma spray-coating process to form a coating film of 150 ⁇ m.
  • a ceramic mixture having a purity of 99,71 % by weight and comprising 91,41 % by weight of ZrO2, 8,3 % by weight of Y2O3, 0,08 % by weight of SiO2, 0,03 % by weight of Fe2O3 and 0,18 % by weight of impurities is applied onto the thus-formed Ni/Co/Cr/Y alloy coating film to a thickness of 250 ⁇ m by a similar spray-coating process.
  • the spray-coating temperature in this spray-coating is of 8.000 °C.
  • a large number of very small pores are present in the ceramic layer, thereby providing a porosity.
  • a permanent mold is made in the same manner as in Example 1, except for use of a ceramic mixture having a purity of 98,93 % and comprising 90,78 % by weight of ZrO2, 8,15 % by weight of Y2O3, 0,38 % by weight of Al2O3, 0,20 % by weight of SiO2, 0,11 % by weight of Fe2O3 and 0,38 % by weight of impurities.
  • the resulting permanent mold had its ceramic layer peeled off a 30.451 runs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP19910100015 1990-01-29 1991-01-02 Ceramic spray coating material Withdrawn EP0444394A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016153A JPH03223455A (ja) 1990-01-29 1990-01-29 セラミック溶射材料
JP16153/90 1990-01-29

Publications (2)

Publication Number Publication Date
EP0444394A2 true EP0444394A2 (fr) 1991-09-04
EP0444394A3 EP0444394A3 (en) 1991-10-02

Family

ID=11908562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910100015 Withdrawn EP0444394A3 (en) 1990-01-29 1991-01-02 Ceramic spray coating material

Country Status (3)

Country Link
EP (1) EP0444394A3 (fr)
JP (1) JPH03223455A (fr)
CA (1) CA2035160A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007830C2 (nl) * 1997-12-18 1999-06-21 Hoogovens Staal Bv Gietvorm voor het continu gieten van metaal en werkwijze voor het continu gieten daarmee.
WO2000056481A1 (fr) * 1999-03-23 2000-09-28 Cast Centre Pty. Ltd. Revetements de coquille pour le moulage en coquille basse pression
EP1163065B1 (fr) * 1999-02-03 2005-02-16 Outokumpu Oyj Moule de fabrication d'element de refroidissement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05132752A (ja) * 1991-06-13 1993-05-28 T-P Kogyo Kk 鋳造用金型へのセラミツク溶射方法
US8603930B2 (en) 2005-10-07 2013-12-10 Sulzer Metco (Us), Inc. High-purity fused and crushed zirconia alloy powder and method of producing same
US7955707B2 (en) * 2005-10-07 2011-06-07 Sulzer Metco (Us), Inc. High purity ceramic abradable coatings
US7799716B2 (en) * 2006-03-03 2010-09-21 Sulzer Metco (Us), Inc. Partially-alloyed zirconia powder
JP5765567B2 (ja) * 2010-08-05 2015-08-19 アイシン精機株式会社 ダイカスト用金型部品
JP6266093B2 (ja) * 2014-04-07 2018-01-24 三菱電機株式会社 熱交換器及び空気調和機
CN112759950B (zh) * 2020-10-28 2022-03-11 北京理工大学 一种ysz/石墨烯复合封严涂层及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485151A (en) * 1982-05-06 1984-11-27 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Thermal barrier coating system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5887273A (ja) * 1981-11-18 1983-05-25 Hitachi Ltd セラミツク被覆層を有する部品とその製造方法
JPS5895678A (ja) * 1981-12-01 1983-06-07 工業技術院長 耐熱性セラミツクコ−テイング方法
JPH0715141B2 (ja) * 1982-11-26 1995-02-22 株式会社東芝 耐熱部品
JPS61250161A (ja) * 1985-04-30 1986-11-07 Riken Corp シリンダライナ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485151A (en) * 1982-05-06 1984-11-27 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Thermal barrier coating system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
THIN SOLID FILMS, vol. 119, no. 2, September 1984, pages 159-171, Lausanne, CH; N.R. SHANKAR et al.: "Neutron and X-ray diffraction of plasma-sprayed zirconia-yttria thermal barrier coatings" *
THIN SOLID FILMS, vol. 150, no. 1, 22nd June 1987, pages 15-40, Lausanne, CH; S. STECURA: "New ZrO2-Yb2O3 plasma-sprayed coatings for thermal barrier applications" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1007830C2 (nl) * 1997-12-18 1999-06-21 Hoogovens Staal Bv Gietvorm voor het continu gieten van metaal en werkwijze voor het continu gieten daarmee.
EP0924011A1 (fr) * 1997-12-18 1999-06-23 Hoogovens Staal B.V. Lingotière pour coulée continue de métaux liquides et procédé pour couler en continue avec cette lingotière
EP1163065B1 (fr) * 1999-02-03 2005-02-16 Outokumpu Oyj Moule de fabrication d'element de refroidissement
WO2000056481A1 (fr) * 1999-03-23 2000-09-28 Cast Centre Pty. Ltd. Revetements de coquille pour le moulage en coquille basse pression

Also Published As

Publication number Publication date
CA2035160A1 (fr) 1991-07-30
EP0444394A3 (en) 1991-10-02
JPH03223455A (ja) 1991-10-02

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