公开(公告)号：AU621563B2

公开(公告)日：1992-03-19

申请号：AU2411388

申请日：1988-10-20

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIKE ROSCOE A ,  GOLDEN GERALD S

IPC: C09J5/02

Abstract: A method of bonding a plurality of articles together with an organic adhesive by using a primer that provides increased crack propagation resistance without the use of organic solvents. The method comprises reacting aluminum, titanium, silicon, iron, or zirconium with HBr or HCI. The reaction product is oxidized with a water soluble oxidizing agent to form a hydrosol. The hydrosol is applied to the surface of a metal article prior to the application of adhesive.

公开(公告)号：AU585800B2

公开(公告)日：1989-06-22

申请号：AU7041187

申请日：1987-03-19

Applicant: UNITED TECHNOLOGIES CORP

Inventor： VONTELL JOHN H ,  PIKE ROSCOE A

IPC: B24B19/14 ,  C23C4/02 ,  C23C4/18 ,  C23C24/00 ,  F01D5/20 ,  B22F3/00 ,  F01D5/28 ,  F01D5/14

Abstract: Techniques are described for the formation of an abrasive surface layer (14) on an article (12). The surface layer (14) is characterized by a single layer of particles (18) which are evenly spaced apart, in a high density arrangement, within a metallic matrix (16). In the deposition of the particles (18) on the article (12), a vacuum is drawn through a perforated plate (42), wherein the location of each perforation (44) corresponds to the desired location of one particle (18) on the article surface (11). The vacuum holds one particle (18) over each perforation (44) in the plate (42), then the plate (42) is positioned over the article (12) and the vacuum level adjusted so that the particles (18) fall onto the article (12). The matrix (16) is then deposited by plasma arc spraying a superalloy powder. The invention is particularly suited to the formation of an abrasive layer on the tip surface of a blade used in a gas turbine engine.

公开(公告)号：CA1255545A

公开(公告)日：1989-06-13

申请号：CA540673

申请日：1987-06-26

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIKE ROSCOE A

IPC: C23C24/08 ,  B24D18/00 ,  F01D5/20 ,  F02C7/28 ,  C23C4/10 ,  C23C4/06

Abstract: IMPROVED METHOD FOR ADHESION OF GRIT TO BLADE TIPS Metal coated ceramic particles are bonded to a metallic substrate in a high temperature sintering process. A low viscosity binder solution containing fine metallic particulates is first applied to the substrate surface. Then, the coated ceramic particles are disposed upon the substrate surface, and the binder solution and the metal particulates therein are attracted by capillarity into regions of point contact between the ceramic particles and the substrate surface. During a subsequent high temperature sintering operation, the metal coating on the ceramic particles diffuses into the metal substrate, and the metallic particulate melt and solidify to bridge the gap between the substrate and ceramic particles.

公开(公告)号：DE3438072A1

公开(公告)日：1985-05-02

申请号：DE3438072

申请日：1984-10-17

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIKE ROSCOE A

IPC: C08G73/00 ,  C08G73/10

Abstract: The present invention is directed toward a process for making water soluble polyimide resin systems. The process comprises preparing a solution of a polyamic acid in an organic solvent, adding water to the solution to cause the polyamic acid to precipitate, filtering the precipitated acid, washing the precipitated acid with water to remove the organic solvent and then reacting the washed acid with a water soluble amine forming the water soluble amine salt of the polyamic acid. This polyamic acid salt may then be converted to the polyimide by heating. These water soluble polyamide systems allow for safer application of polyimide coatings to substrates.

公开(公告)号：DE69404455T2

公开(公告)日：1998-02-26

申请号：DE69404455

申请日：1994-04-14

Applicant: UNITED TECHNOLOGIES CORP

Inventor： ALLEN WILLIAM P ,  BORNSTEIN NORMAN S ,  CHIN STEPHEN ,  DECRESCENTE MICHAEL ,  DUHL DAVID N ,  PARILLE DONALD R ,  PIKE ROSCOE A ,  SMEGGIL JOHN G

IPC: C21D3/02 ,  C22B9/14 ,  C22F1/00 ,  C22F1/02 ,  C22F1/10

Abstract: Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any oxide film present on the article surface. The heat treatment is best carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out within the range defined by the incipient melting temperature of the article and about 150 DEG C. below the incipient melting temperature of the article. At such temperatures the foreign chemical species reacts with and modifies the oxide film on the article surface. Sulfur is then able to diffuse through such modified film, and a more oxidation resistant component is produced.

公开(公告)号：DE68913298D1

公开(公告)日：1994-03-31

申请号：DE68913298

申请日：1989-12-08

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIKE ROSCOE A

IPC: B64C1/00 ,  B29C70/06 ,  B29C70/10 ,  B29K105/06 ,  B64G1/00 ,  C08J5/06 ,  D01F11/12 ,  D06M11/45 ,  C22C1/09

Abstract: A method of making a polymeric composite wherein the polymeric composite is more oxidatively stable. The method comprises reacting aluminum, titanium, silicon, or zirconium with HBr or HI2, oxidizing the reaction product to form a hydrosol and applying the hydrosol to the fiber surface prior to incorporation in a polymeric composite. The composite exhibits greater oxidative stability as it is exposed to temperatures of about 100 DEG C to about 900 DEG C.

公开(公告)号：DE3780914T2

公开(公告)日：1992-12-24

申请号：DE3780914

申请日：1987-11-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： LAMM FOSTER P ,  PIKE ROSCOE A

IPC: C09J5/02 ,  C08J5/12

Abstract: A method of bonding articles together utilizing a short term corrosive pretreatment prior to application of an amorphous hydrated metal oxide primer and an adhesive resulting in a joint resistant to crack propagation. The method comprises bonding a plurality of articles together, at least one of which is metal. The surface of the metal article is exposed to a corrosive environment at a temperature less than about 50 DEG C. Then a layer comprising Mx(OR)y wherein x is 1, y is 3 or 4, M is any metal capable of forming a stable alkoxide and R is an organic radical, is applied to the pretreated surface. Then the coated metal article is exposed to moisture and a temperature of about 25 DEG C to about 125 DEG C. The metal article is bonded to another article with a polymeric adhesive.

公开(公告)号：AU4692989A

公开(公告)日：1990-06-21

申请号：AU4692989

申请日：1989-12-19

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIKE ROSCOE A

IPC: B32B7/12 ,  C08J5/12 ,  C09J5/02 ,  C09J5/06 ,  F16B11/00

Abstract: A method of adhesively bonding articles, at least one of which is a titanium alloy, resulting in a joint resistant to crack propagation. A layer of metal alkoxide is applied to the titanium article and the metal alkoxide layer is exposed to heat and moisture. A polymeric adhesive is disposed between the articles and pressure and optionally heat are applied to the articles. The improvement comprises exposing the surface of the titanium article, prior to application of the metal alkoxide, to a substantially noncorrosive, nonanodic environment and abrasively treating the titanium article.

公开(公告)号：CA1302798C

公开(公告)日：1992-06-09

申请号：CA532636

申请日：1987-03-20

Applicant: UNITED TECHNOLOGIES CORP

Inventor： VONTELL JOHN H ,  PIKE ROSCOE A

IPC: B24B19/14 ,  C23C4/02 ,  C23C4/18 ,  C23C24/00 ,  F01D5/20 ,  B05D5/00

Abstract: Method for Depositing a Layer of Abrasive Material on a Substrate Techniques are described for the formation of an abrasive surface layer (14) on an article (12). The surface layer (14) is characterized by a single layer of particles (18) which are evenly spaced apart, in a high density arrangement, within a metallic matrix (16). In the deposition of the particles (18) on the article (12), a vacuum is drawn through a perforated plate (42), wherein the location of each perforation (44) corresponds to the desired location of one particle (18) on the article surface (11). The vacuum holds one particle (18) over each perforation (44) in the plate (42), then the plate (42) is positioned over the article (12) and the vacuum level adjusted so that the particles (18) fall onto the article (12). The matrix (16) is then deposited by plasma arc spraying a superalloy powder. The invention is particularly suited to the formation of an abrasive layer on the tip surface of a blade used in a gas turbine engine.

公开(公告)号：CA1294860C

公开(公告)日：1992-01-28

申请号：CA551643

申请日：1987-11-12

Applicant: UNITED TECHNOLOGIES CORP

Inventor： LAMM FOSTER P ,  PIKE ROSCOE A

IPC: C09J5/02 ,  B32B15/04 ,  B32B7/12 ,  B32B31/12 ,  B32B31/20

Abstract: Pretreatment Process for Amorphous Hydrated Metal Oxide Primer for Organic Adhesively Bonded Joints A method of bonding articles together utilizing a short term corrosive pretreatment prior to application of an amorphous hydrated metal oxide primer and an adhesive resulting in a joint resistant to crack propagation. The method comprises bonding a plurality of articles together, at least one of which is metal. The surface of the metal article is exposed to a corrosive environment at a temperature less than about 50.degree.C. Then a layer comprising MX(OR)y wherein x is 1, y is 3 or 4, M is any metal capable of forming a stable alkoxide and R is an organic radical, is applied to the pretreated surface. Then the coated metal article is exposed to moisture and a temperature of about 25.degree.C to about 125.degree.C. The metal article is bonded to another article with a polymeric adhesive.