GB1419896A - Coating of preformed ceramic cores - Google Patents

Coating of preformed ceramic cores

Info

Publication number
GB1419896A
GB1419896A GB2169073A GB2169073A GB1419896A GB 1419896 A GB1419896 A GB 1419896A GB 2169073 A GB2169073 A GB 2169073A GB 2169073 A GB2169073 A GB 2169073A GB 1419896 A GB1419896 A GB 1419896A
Authority
GB
United Kingdom
Prior art keywords
core
casting
silica
layer
immersed
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
Application number
GB2169073A
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.)
Sherwood Refractories Inc
Original Assignee
Sherwood Refractories Inc
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 Sherwood Refractories Inc filed Critical Sherwood Refractories Inc
Publication of GB1419896A publication Critical patent/GB1419896A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/88—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/284—Selection of ceramic materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Mold Materials And Core Materials (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

1419896 Foundry cores SHERWOOD REFRACTORIES Inc 7 May 1973 [8 May 1972] 21690/73 Heading B3F [Also in Division C1] A core containing silica is provided with a stable, refractory oxide barrier layer on its surface by contacting the core with a molten metal alloy containing one or more metals which react with the silica to form such a layer. Suitable reactive metals include Be, Ca, Mg, Al, Y, La, Ce, Ti, Zr, Hf, and Th. The alloy preferably has a liquidus temperature between 600‹ and 1500‹ C. and also comprises one or more non-reactive metal such as Cu, Si, Ge, Fe, Co, Ni, Cr, Mo, W, V, Nb and Ta. The core is immersed in a molten metal bath containing the reactive metal and maintained at a temperature in the range 1100‹ to 1600‹ C., and is held there for a length of time, sufficient for a layer between 0À00001 and 0À001 inch thick to be formed. It may then be immersed in a second metal bath having a composition different from that of the first. Besides silica the core may contain zircon, zirconia or alumina and may be formed by injection moulding, extrusion, pressing, slip-casting or by pouring a ceramic slurry into a plastic mould. The core may be used in the casting of gas turbine engine parts by a last-wax process, the core being removed from the completed casting by leaching with sodium or potassium hydroxide.
GB2169073A 1972-05-08 1973-05-07 Coating of preformed ceramic cores Expired GB1419896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00251252A US3824113A (en) 1972-05-08 1972-05-08 Method of coating preformed ceramic cores

Publications (1)

Publication Number Publication Date
GB1419896A true GB1419896A (en) 1975-12-31

Family

ID=22951131

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2169073A Expired GB1419896A (en) 1972-05-08 1973-05-07 Coating of preformed ceramic cores

Country Status (6)

Country Link
US (1) US3824113A (en)
JP (1) JPS5652870B2 (en)
CA (1) CA967822A (en)
DE (1) DE2323128A1 (en)
FR (1) FR2189145B1 (en)
GB (1) GB1419896A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552198A (en) * 1980-10-04 1985-11-12 Rolls-Royce Ltd. Removing refractory material from components
US4569384A (en) * 1982-09-04 1986-02-11 Rolls-Royce Limited Dissolving ceramic materials
WO2022029388A1 (en) * 2020-08-06 2022-02-10 Safran Protection against oxidation or corrosion of a hollow part made of a superalloy

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916075A (en) * 1972-07-22 1975-10-28 Philips Corp Chemically highly resistant material
JPS5235043B2 (en) * 1973-01-24 1977-09-07
US3972367A (en) * 1975-06-11 1976-08-03 General Electric Company Process for forming a barrier layer on ceramic molds suitable for use for high temperature eutectic superalloy casting
US4031945A (en) * 1976-04-07 1977-06-28 General Electric Company Process for making ceramic molds having a metal oxide barrier for casting and directional solidification of superalloys
DE2634633C2 (en) * 1976-07-31 1984-07-05 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Continuous casting mold made of a copper material, especially for continuous casting of steel
FR2433164A1 (en) * 1978-08-08 1980-03-07 Produits Refractaires BLOCKS BASED ON ELECTRO-MELT REFRACTIVE OXIDES ARMED OF A MEMBER IN A MATERIAL OF HIGH THERMAL CONDUCTIVITY
JPS6185069U (en) * 1984-11-09 1986-06-04
JPS6276503U (en) * 1985-10-31 1987-05-16
JPS63198370U (en) * 1987-06-06 1988-12-21
US5262203A (en) * 1989-07-07 1993-11-16 Lanxide Technology Company, Lp Methods of producing ceramic and ceramic composite bodies
US5120580A (en) * 1989-07-07 1992-06-09 Lanxide Technology Company, Lp Methods of producing ceramic and ceramic composite bodies
JP2950122B2 (en) * 1993-07-29 1999-09-20 信越化学工業株式会社 Method and apparatus for producing composite of ceramic and metal
US7163963B2 (en) * 2003-09-08 2007-01-16 Conocophillips Company Chemically and thermally stabilized alumina for Fischer-Tropsch catalysts
US7811965B2 (en) * 2004-08-18 2010-10-12 Symyx Solutions, Inc. Platinum-copper-nickel fuel cell catalyst
US7802613B2 (en) * 2006-01-30 2010-09-28 United Technologies Corporation Metallic coated cores to facilitate thin wall casting
US20120073303A1 (en) * 2010-09-23 2012-03-29 General Electric Company Metal injection molding process and components formed therewith
US8876481B2 (en) * 2011-01-05 2014-11-04 General Electric Company Turbine airfoil component assembly for use in a gas turbine engine and methods for fabricating same
US20160175923A1 (en) 2012-04-09 2016-06-23 General Electric Company Composite core for casting processes, and processes of making and using the same
CN103464676A (en) * 2013-09-10 2013-12-25 西安航空动力股份有限公司 Protection method for preventing ceramic cores from having chemical reactions
EP3071350B1 (en) 2013-11-18 2018-12-05 United Technologies Corporation Coated casting cores and manufacture methods
US10150158B2 (en) 2015-12-17 2018-12-11 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US9987677B2 (en) 2015-12-17 2018-06-05 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US10118217B2 (en) 2015-12-17 2018-11-06 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US10099276B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having an internal passage defined therein
US10099284B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having a catalyzed internal passage defined therein
US10099283B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having an internal passage defined therein
US10046389B2 (en) 2015-12-17 2018-08-14 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US9579714B1 (en) 2015-12-17 2017-02-28 General Electric Company Method and assembly for forming components having internal passages using a lattice structure
US10137499B2 (en) 2015-12-17 2018-11-27 General Electric Company Method and assembly for forming components having an internal passage defined therein
US9968991B2 (en) 2015-12-17 2018-05-15 General Electric Company Method and assembly for forming components having internal passages using a lattice structure
US10286450B2 (en) 2016-04-27 2019-05-14 General Electric Company Method and assembly for forming components using a jacketed core
US10335853B2 (en) 2016-04-27 2019-07-02 General Electric Company Method and assembly for forming components using a jacketed core
US10335851B2 (en) * 2017-04-24 2019-07-02 GM Global Technology Operations LLC Sand core to eliminate degenerated skin
US10364189B2 (en) 2017-05-04 2019-07-30 General Electric Company Methods for forming ceramic cores
CN111593287B (en) * 2020-05-29 2022-09-30 深圳市万泽中南研究院有限公司 Method for forming ceramic core aluminum oxide coating by supersonic plasma spraying

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL235063A (en) * 1958-01-13
US2932864A (en) * 1958-06-17 1960-04-19 Mellen Method of making and drying shell-type refractory molds
US3016311A (en) * 1958-12-17 1962-01-09 Union Carbide Corp High temperature coatings and bodies
US3222435A (en) * 1963-04-30 1965-12-07 Jr Edward J Mellen Injection molding of ceramic cores
US3171174A (en) * 1963-06-06 1965-03-02 Jr Edward J Mellen Frozen-mercury process for making shell molds
US3307232A (en) * 1965-01-04 1967-03-07 Edward J Mellen Jr Method and apparatus for forming shell molds by the use of a fluidized bed drying system
US3452804A (en) * 1965-12-02 1969-07-01 Edward J Mellen Method of making a permeable shell mold
US3450672A (en) * 1967-01-12 1969-06-17 Gen Electric Organosilsesquioxanes and a method for making them

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552198A (en) * 1980-10-04 1985-11-12 Rolls-Royce Ltd. Removing refractory material from components
US4569384A (en) * 1982-09-04 1986-02-11 Rolls-Royce Limited Dissolving ceramic materials
WO2022029388A1 (en) * 2020-08-06 2022-02-10 Safran Protection against oxidation or corrosion of a hollow part made of a superalloy

Also Published As

Publication number Publication date
DE2323128A1 (en) 1973-11-22
JPS5652870B2 (en) 1981-12-15
FR2189145B1 (en) 1976-09-17
JPS4923210A (en) 1974-03-01
CA967822A (en) 1975-05-20
FR2189145A1 (en) 1974-01-25
US3824113A (en) 1974-07-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee