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公开(公告)号：WO0036184A2
公开(公告)日：2000-06-22
申请号：PCT/US9925962
申请日：1999-11-04
Applicant: GEN ELECTRIC
Inventor： FARR HOWARD JOHN , BETSCHER KEITH HUMPHRIES , WORTHING RICHARD ROY JR , SANGEETA D , VAKIL HIMANSHU BACHUBHAI , JOHNSON CURTIS ALAN , CARTIER THOMAS JOSEPH JR , STOKES EDWARD BRITTAIN , JASTER HEINZ
IPC: B08B3/08 , B08B3/10 , B08B7/00 , C23G1/14 , C23G1/36 , C23G3/00 , C23G5/02 , C23G5/04 , C23G1/00
Abstract: Apparatus for stripping ceramic coatings from the surfaces of articles. The apparatus includes a dedicated pressure vessel, such as an autoclave, which is maintained at an elevated temperature. Caustic solution is preheated to a first elevated temperature before injecting it into the autoclave, and the caustic solution is filtered and cooled after use in the autoclave. The articles are stripped of coating by maintaining the articles at an elevated temperature and pressure for a predetermined time. Various options include the use of analytical equipment to maintain the chemistry of the caustic solution and use of a volatile organic solution to prepressurize the autoclave and shorten cycle time. The autoclave is maintained in a nitrogen chamber to minimize the risks associated with volatile components. The articles are transferred to a separate pressure vessel after completion of the stripping operation so that the autoclave used for stripping can be maintained at an elevated temperature, thereby shortening the cycle time for stripping of additional articles.
Abstract translation: 用于从制品表面剥离陶瓷涂层的装置。 该设备包括保持在高温下的专用压力容器，例如高压釜。 苛性溶液在将其注入高压釜前预热至第一升高温度，苛性碱溶液在高压釜中使用后过滤并冷却。 通过将制品保持在升高的温度和压力下预定的时间，将制品剥离。 各种选择包括使用分析设备来维持苛性碱溶液的化学性质，并使用挥发性有机溶液来预压缩高压釜并缩短循环时间。 将高压釜保持在氮气室中以最小化与挥发性组分相关的风险。 在完成剥离操作之后，将制品转移到单独的压力容器中，以使得用于汽提的高压釜可以保持在升高的温度，从而缩短了剥离附加制品的循环时间。
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公开(公告)号：JP2001226784A
公开(公告)日：2001-08-21
申请号：JP2000378251
申请日：2000-12-13
Applicant: GEN ELECTRIC
Inventor： SANGEETA D , CARTIER THOMAS JOSEPH , JOHNSON CURTIS ALAN , JOHNSON ROGER NEAL
Abstract: PROBLEM TO BE SOLVED: To provide a method for removing a film from the surfaces of one or more holes of a metallic substrate. SOLUTION: A substrate is treated with a film removing solution while the substrate or the film removing solution is swiftly oscillated. The oscillation of the substrate can be performed by using a transducer and a waveguide related thereto. Various waveguides such as a motor driving shaking device and an ultrasonic device are used. As the film removing solution, ordinarily, caustic alkali is used. The device for removing a film from holes of a metallic substrate is provided as well.
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公开(公告)号：JP2001115250A
公开(公告)日：2001-04-24
申请号：JP2000249111
申请日：2000-08-21
Applicant: GEN ELECTRIC
Inventor： SANGEETA D , FARR HOWARD JOHN
Abstract: PROBLEM TO BE SOLVED: To provide a new technique of application of a metal aluminide film on a substrate. SOLUTION: In the method for forming a metal-containing layer on a substrate, first a slurry of the above metal is deposited onto the substrate and then heating is applied to the metal slurry to remove volatile matter from the slurry and to form a layer of the above metal, or, before or after heat treating the metal to some extent, an aluminum slurry is deposited onto the metal slurry. The film containing noble metal aluminide compound can be obtained by diffusion heat treatment. Related products are also disclosed.
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公开(公告)号：JP2002173783A
公开(公告)日：2002-06-21
申请号：JP2001210089
申请日：2001-07-11
Applicant: GEN ELECTRIC
Inventor： HASZ WAYNE CHARLES , SANGEETA D
Abstract: PROBLEM TO BE SOLVED: To provide a metal-based substrate, such as turbine engine to which films of bond coat and thermal barrier coating are applied. SOLUTION: In the method for applying bond coat to the metallic base material, slurry containing not only brazing filler metal but also volatile component is applied to the substrate. Such slurry can contain a material for bond coat, or the material for bond coat can be applied subsequently as a solid or secondary slurry. Then the slurry and the bond coat are dried and deposited onto the base material.
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公开(公告)号：JP2001070879A
公开(公告)日：2001-03-21
申请号：JP2000193696
申请日：2000-06-28
Applicant: GEN ELECTRIC
Inventor： PARK DONG-SIL , SANGEETA D , LAU YUK-CHIU , GROSSMAN THEODORE ROBERT , NYE DAVID ALAN
IPC: B05D7/22 , B05D3/02 , B05D7/24 , B22F7/00 , B22F7/04 , C23C10/18 , C23C16/00 , C23C22/32 , C23C22/33 , C23C24/08
Abstract: PROBLEM TO BE SOLVED: To suitably coat an inside surface such as the inside passage of a turbine engine part by applying slurry containing metallic powder on the inside surface of a base material and drying the slurry to form a metal based coating film on the base material with the slurry. SOLUTION: In the method for forming the metal based coating film on the inside passage of the base material, the slurry is applied along the inside passage. The slurry contains the metallic power, preferably aluminum powder and the other metallic powder can be used in accordance with the final use of a part member. The slurry is applied on the inside surface by various methods. After the slurry is applied on the inside passage, the flow of a gas is generated in the passage to remove the excess slurry from the passage. The gas is atmospheric air or compressed air and the other gas can also be used. After the gas is passed through the passage, the slurry is dried to vaporize a liquid medium in the slurry to form the dried metal based coating film.
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Patent Agency Ranking
公开(公告)号：JP2001003184A
公开(公告)日：2001-01-09
申请号：JP2000133936
申请日：2000-05-02
Applicant: GEN ELECTRIC
Inventor： MACDONALD LEO SPITZ , SANGEETA D , ROSENZWEIG MARK ALAN
Abstract: PROBLEM TO BE SOLVED: To easily, rapidly and safely execute removal at a low energy cost by bringing >=1 kind of stripping compositions containing aliphatic or aromatic sulfonic acids, second acids and >=1 kind among complexing agents, oxidizing agents and reducing agents into contact with the surfaces of substrates, then removing the coatings. SOLUTION: The stripping compositions of different kinds are used according to the kinds of the substrates, the kinds of the coatings to be removed from the substrates, the final applications of the substrates, the presence or absence of additional treatments, and the like. The sulfonic acid adequate as the composition of the first kind includes metal sulfonic acid, benzene sulfonic acid, and the like. The composition of the second kind includes an inorganic acid and an organic solvent. Hydrochloric acid, nitric acid, perchloric acid, and the like, are used for the inorganic acid, and an aliphatic alcohol, and the like are used for the organic solvent. The weight ratio of the inorganic acid to the solvent is specified to about 20:80 to about 80:20. The composition of a third kind consists of sulfuric acid or its aqueous solution and the ratio of the acid to the water is specified to about 10:90 to about 65:35.
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公开(公告)号：JP2000248391A
公开(公告)日：2000-09-12
申请号：JP33912599
申请日：1999-11-30
Applicant: GEN ELECTRIC
Inventor： SANGEETA D , FARR HOWARD JOHN , WUSTMAN ROGER DALE
IPC: B08B3/08 , C23C4/02 , C23C10/02 , C23C16/00 , C23F1/00 , C23F1/40 , C23G1/14 , C23G1/20 , C23G3/00 , F01D5/00 , F01D5/28
Abstract: PROBLEM TO BE SOLVED: To provide a caustic alkali process for removing thermal insulation coating from lower layer metallic parts without forming inconvenient peeled material. SOLUTION: This aq. alkali method can be used for exchanging thermal insulation coating on the surface of metal. In this method, the surface of metal is brought into contact with a caustic alkali soln. to remove thermal insulation coating. The treating conditions in the case of the contact with the caustic alkali soln. are selected so as to prevent the formation of a peeled layer at the time of the application of the exchange thermal insulation coating and heat treatment in the poststages. Next, the exchange thermal insulation coating is reapplied on the metallic surface.
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公开(公告)号：JP2001226759A
公开(公告)日：2001-08-21
申请号：JP2000297788
申请日：2000-09-29
Applicant: GEN ELECTRIC
Inventor： SANGEETA D , JOHNSON CURTIS ALAN , NELSON WARREN ARTHUR
IPC: F01D5/28 , C23C4/10 , C23C4/18 , C23C10/18 , C23C24/10 , C23C26/00 , C23C28/00 , C23C28/04 , F01D9/02 , F02C7/00 , F23R3/42
Abstract: PROBLEM TO BE SOLVED: To provide a method for smoothing the surface of a protective film composed essentially of ceramics showing roughness. SOLUTION: In this method, a slurry or gel film composed essentially of ceramics is provided to the surface of a protective film and heating is applied to the slurry/gel film to remove volatile matter, and then heating is further applied to the slurry/gel film to harden the film and also bond it to the protective film under it. The slurry/gel film is often composed essentially of yttria- stabilized zirconia and a precursor of oxide matrix. Related products are also noted.
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公开(公告)号：JP2001164355A
公开(公告)日：2001-06-19
申请号：JP2000303214
申请日：2000-10-03
Applicant: GEN ELECTRIC
Inventor： CARTIER THOMAS JOSEPH , SANGEETA D , PARK DONG-SIL , GROSSMAN THEODORE ROBERT
IPC: B05D7/14 , B05D7/24 , C23C10/06 , C23C10/20 , C23C10/30 , C23C10/48 , C23C10/50 , C23C24/08 , C23C30/00
Abstract: PROBLEM TO BE SOLVED: To provide a method for forming an aluminide coating layer on the surface of a base material. SOLUTION: The method for coating the surface of a base material includes steps of: preparing a base material having a surface; and coating the surface with a bubbly suspension containing powder suspended in bubbles to form a coating layer on the surface. The base material is further heat treated, and the coating layer is made dense along the surface.
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公开(公告)号：JPH10183013A
公开(公告)日：1998-07-07
申请号：JP30323697
申请日：1997-11-06
Applicant: GEN ELECTRIC
Inventor： SANGEETA D , SZALA LAWRENCE EDWARD , WOODRUFF DAVID WINFIELD , NAGARAJ BANGALORE ASWATHA , MCATEE DANIEL SCOTT , SPIRO CLIFFORD LAWRENCE
Abstract: PROBLEM TO BE SOLVED: To obtain an improved heat-shielding coating for a metal base comprising, e.g. a superalloy by using a slurry composition containing zirconia spheres a considerable number of which are hollow and which are contained in a porous oxide matrix obtained from silica, comprising, e.g. an aluminosilicate. SOLUTION: This coating composition contains zirconia spheres present in a porous oxide matrix. The spheres have a size of about 5-400μm, preferably about 5-150μm in practice, and at least some of the spheres are hollow. The composition can be very simply applied to a desired surface by slurry cashing or a similar technique. The coating methods provided include the one which comprises successively applying layers different in slurry composition and using a different cure technique after application of the final coating from that used for preceding intermediate layers.
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