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公开(公告)号：JPH1068089A
公开(公告)日：1998-03-10
申请号：JP17138597
申请日：1997-06-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MULLOOLY JOHN FRANCIS JR , NISSLEY DAVID M , HARTER HAROLD DAVID , SHAH DILIP M , MAHLER FREDERIC H , HASTINGS WILLIAM J III , DONOVAN ROY R , BOSE SUDHANGSHU
IPC: F01D5/08 , C23C4/02 , C23C4/08 , C23C4/10 , C23C28/00 , C23C30/00 , F01D5/28 , F02C7/00 , F02C7/30 , F23R3/42
Abstract: PROBLEM TO BE SOLVED: To improve heat insulating characteristics by providing a metal bonding coat capable of being adhered without executing high temp. heat treatment and porous ceramics to be deposited thereon. SOLUTION: This heat insulating barrier coating system 12 is applied to the surface at the inside of a primary turbine vane supporting body 14. The material of the vane supporting body 14 is composed of an Ni base alloy. In the coating system 12, at first, a bond coat having a thickness of 0.003 inch is formed by a plasma spraying method in air. The compsn. of the bond coat is composed of, by weight, 23% Co, 17% Cr, 12.5% Al, 0.45% Y, and the balance Ni. Next, the surface of the bond coat is applied with air plasma spraying of zirconia partially stabilized by 6 to 8% yttria to form a porous ceramic layer. At this time, a small amt. of polyester powder is added into the ceramic material to form desired vol.% of narrow pores. In this way, cracks are hardly caused even by the severest engine test.
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公开(公告)号：JP2003269190A
公开(公告)日：2003-09-25
申请号：JP2003063986
申请日：2003-03-10
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BOSE SUDHANGSHU , CETEL ALAN D , DRAGHI PETER J , PIETRUSKA NORMAN
Abstract: PROBLEM TO BE SOLVED: To provide a repairing method of a turbine engine part. SOLUTION: This repairing method of the turbine engine part such as a vane and a blade having air foil comprises to remove an oxide deposit from respective parts of a part indicating damage by crushing or oxidation of heat insulating coating, to remove a ceramic heat insulating layer from the part, and to blend a surface of the part generating nicks, dents and cracks. When the part has a deteriorated aluminum area, the deteriorated area is removed or replenished. A tip part of the part is also recovered when the part is damaged, and cutting capacity of the part is restored by applying polishing to the tip part. Afterwards, ceramic coating is applied to the part. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2002180270A
公开(公告)日：2002-06-26
申请号：JP2001306089
申请日：2001-10-02
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MULLOOLY JOHN FRANCIS JR , NISSLEY DAVID M , HARTER HAROLD DAVID , SHAH DILIP M , MAHLER FREDERIC H , HASTINGS WILLIAM J III , DONOVAN ROY R , BOSE SUDHANGSHU
IPC: F01D5/08 , C23C4/02 , C23C4/08 , C23C4/10 , C23C28/00 , C23C30/00 , F01D5/28 , F02C7/00 , F02C7/30 , F23R3/42
Abstract: PROBLEM TO BE SOLVED: To provide a thermal barrier coating(TBC) system which has improved thermal insulation characteristics and by which gas turbine engine parts of different shapes, thicknesses and sizes can be treated without requiring a high- temperature heat treatment for adhesion of a bond coat. SOLUTION: The TBC system having improved thermal insulation characteristics without requiring a high-temperature heat treatment for adhesion of a bond coat is applied to gas turbine engine parts of various shapes, thicknesses and sizes. This thermal barrier system requires no high-temperature heat treatment at the above adhesion of the bond coat for producing bonding between the metallic bond coat and a metallic base material. Further, a porous ceramic heat insulating layer is formed on the metallic bond coat. This coating system can be effectively used in particular for metallic parts liable to cause deformation during heat treatment and parts requiring thermal insulation treatment in a mounted state.
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公开(公告)号：JP2000038652A
公开(公告)日：2000-02-08
申请号：JP16634999
申请日：1999-06-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： RISTAU RAYMOND P , BOSE SUDHANGSHU , ALAN D SETEL
Abstract: PROBLEM TO BE SOLVED: To provide the method for the pretreatment suitable for the forming the ceramic heat insulating coating on a superalloy member. SOLUTION: The method for the pretreatment comprises first degreasing the surface of a superalloy member containing Al in an amount sufficient to form alumina by oxidation and elements such as Y, Hf, Ce and La in a total content of 0.1-0.9 wt.%, which have been added to improve the structure of the superalloy, by heating, removing the formed oxide film on the surface by abrading using a wet grit blast, removing the abrasive by ultrasonic cleaning in a aqueous solution containing a wetting agent, further, after successively rinsing the surface in pure water containing the wetting agent, in pure water and in a water-soluble organic solvent, drying with air and finally heating the superalloy member in an atmosphere, which is inert to the superalloy and alumina and has a dew point of -30--50 deg.F (-34--46 deg.C), to form an alumina film having a thickness of about 0.5-1.5 μm.
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公开(公告)号：DE60302396D1
公开(公告)日：2005-12-29
申请号：DE60302396
申请日：2003-08-05
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BOSE SUDHANGSHU , UCASZ MARK T , BALES DANIEL A , WIGHT MERRITT W , BURNS STEVEN M , TYRUS E ROYAL
IPC: F01D5/28 , C23C4/06 , C23C4/12 , C23C4/18 , C23C8/02 , C23C8/28 , C23C14/06 , C23C16/00 , C23C28/00 , F02C7/00
Abstract: The present invention relates to an overlay coating which has improved strength properties. The overlay coating comprises a deposited layer of MCrAlY material containing discrete nitride particles therein. The nitride particles are present in a volume fraction in the range of 0.1% to 15.0% and have a particle size in the range of from 0.1 microns to 10.0 microns. The coating may also have oxide particles dispersed therein.
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Patent Agency Ranking
公开(公告)号：DE69707365T2
公开(公告)日：2002-07-11
申请号：DE69707365
申请日：1997-06-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MULLOOLY JOHN FRANCIS JR , NISSLEY DAVID M , HARTER HAROLD DAVID , SHAH DILIP M , MAHLER FREDERIC H , HASTINGS WILLIAM J III , DONOVAN ROY R , BOSE SUDHANGSHU
IPC: F01D5/08 , C23C4/02 , C23C4/08 , C23C4/10 , C23C28/00 , C23C30/00 , F01D5/28 , F02C7/00 , F02C7/30 , F23R3/42 , C23C4/04
Abstract: The invention concerns a thermal barrier coating system (12) requiring no bond coat adherence high temperature heat treatment and having enhanced insulating capabilities such that it may be applied to gas turbine engine components of varied shape, thickness and size. In preferred embodiments, the system includes a metallic bond coat which does not require a bond coat adherence high temperature heat treatment to form a bond between the metallic bond coat and a metallic substrate to which it is applied. A porous ceramic insulating layer is deposited on the metallic bond coat. In another preferred embodiment, the porous ceramic insulating layer is deposited directly on the metallic substrate. The coating system is particularly advantageous for insulating metallic components prone to distortion in heat treatment and those requiring insulation in an as machined condition.
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公开(公告)号：BR8301586A
公开(公告)日：1983-12-06
申请号：BR8301586
申请日：1983-03-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BOSE SUDHANGSHU
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公开(公告)号：NO831099A
公开(公告)日：1983-10-03
申请号：NO831099
申请日：1983-03-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BOSE SUDHANGSHU
IPC: B01J23/42 , B01J23/64 , B01J23/648 , B01J23/652 , B01J23/89 , C07B31/00 , C07B33/00 , C07C67/00 , C22C5/04 , H01M4/86 , H01M4/92 , B01J , H01M
CPC classification number: H01M4/928 , B01J23/6482 , B01J23/652 , B01J23/8913 , H01M4/92 , H01M4/921 , H01M4/925 , H01M2004/8689 , H01M2300/0005 , H01M2300/0008
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公开(公告)号：AT474680T
公开(公告)日：2010-08-15
申请号：AT04256369
申请日：2004-10-15
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BEALS JAMES T , PERSKY JOSHUA , SHAH DILIP M , SEETHARAMAN VENKAT , BOSE SUDHANGSHU , SNYDER JACOB , SANTELER KEITH , VERNER CARL , MURRAY STEPHEN D , MARCIN JOHN J , GUPTA DINESH , BALES DANIEL A , PAULONIS DANIEL F , COTNOIR GLENN , WIEDEMER JOHN
Abstract: A refractory metal core for use in a casting system has a coating for providing oxidation resistance during shell fire and protection against reaction/dissolution during casting. In a first embodiment, the coating comprises at least one oxide and a silicon containing material. In a second embodiment, the coating comprises an oxide selected from the group consisting of calcia, magnesia, alumina, zirconia, chromia, yttria, silica, hafnia, and mixtures thereof. In a third embodiment, the coating comprises a nitride selected from the group consisting of silicon nitride, sialon, titanium nitride, and mixtures thereof. Other coating embodiments are described in the disclosure.
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公开(公告)号：DE69525050T2
公开(公告)日：2002-10-02
申请号：DE69525050
申请日：1995-06-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： BOSE SUDHANGSHU
IPC: C04B35/80
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