General Electric Company

Jeffrey Reid Thyssen

Farshad Ghasripoor

Laurent Cretegny

Daniel Joseph Lewis

Don Mark Lipkin

Stephen Francis Rutkowski

Raymond Edward Chupp

Dalero Winston Berkeley

Chek Beng Ng

Norman Arnold Turnquist

Mahmut Faruk Aksit

Biao Fang

Shorya Awtar

Glenn Herbert Nichols

James C Przytulski

James William Stegmaier

Eric Garrard Smith

Kurt Grover Brink

Carl Anthony Flecker, Iii

Robert Krummen

Richard Cohen Lykins

A process for forming a coating on a surface of a substrate, so that heating of the coating material is selective and sufficient to cause at least partial melting of the coating material and permit bonding to the substrate without excessively heating the substrate so as not to significantly degrade its properties. The process generally entails forming a brazing paste containing powder particles dispersed in a binder. The particles are formed of a composition that is susceptible to microwave radiation. The brazing paste is then applied to the surface of the substrate and subjected to microwave radiation so that the particles couple with the microwave radiation and are sufficiently heated to burn off the binder and then at least partially melt to form an at least partially molten layer on the substrate. The microwave radiation is then interrupted to allow the at least partially molten layer to cool, solidify, and form the coating.

Microwave brazing process for forming coatings

A process and apparatus for forming wires, such as wires used as feedstock in welding, brazing, and coating deposition processes. The process and apparatus generally entail feeding through a passage a quantity of powder particles of a size and composition that render the particles susceptible to microwave radiation. As the particles travel through the passage, the particles within the passage are subjected to microwave radiation so that the particles couple with the microwave radiation and are sufficiently heated to melt at least a radially outermost quantity of particles within the passage. The particles are then cooled so that the radially outermost quantity of particles solidifies to yield a wire having a consolidated outermost region surrounding an interior region of the wire.

Process and apparatus for forming wire from powder materials

A process for heating powder materials by microwave radiation so that heating and sintering or melting progressively and directionally occurs within the powder materials. The process generally entails forming a structure from a powder by arranging the powder in a mass according to size of particles of the powder so that the particles are progressively arranged within at least a region of the mass from smallest to largest. The mass is then subjected to microwave radiation so that the particles within the mass progressively couple with the microwave radiation according to size, the smallest particles coupling first and heating faster than larger particles of the powder, and the largest particles coupling last and heating slower than smaller particles of the powder. As a result of the progressive arrangement of the particles, the mass is progressively and directionally heated by the microwave radiation.

Process of microwave heating of powder materials

A compliant seal assembly for a rotating machine is provided. The seal assembly includes a static member, a movable member and a biasing member. The static member is rigidly fixed to the machine at its fore and aft ends. The movable portion has a first sealing surface configured to seal against a rotating member and a rear surface, which may be exposed to a fluid pressure to urge the first sealing surface toward a sealing position with the rotating member. The static and the movable members further include sealing surfaces at their fore, aft and end faces to seal against leakage of gas between the static and the movable members. The biasing member is configured to support the movable member on the static member and to urge the movable member away from the sealing position so as to reduce force on the rotating member during contact of the rotating member with the first sealing surface of the movable member.

Compliant seal and system and method thereof

Process of brazing an alumina-coated honeycomb and fiber metal material to a substrate, in which a mask material is applied to a portion of the honeycomb and fiber metal prior to deposition of the AlO, and the mask material is removed after deposition and prior to brazing to the substrate.

Brazing of alumina coated honeycomb and fiber metal

Oxidation resistant sealant system comprising a honeycomb component coated with an aluminum oxide layer.

Aluminum oxide coated honeycomb for S2S and S3S sealing system with extended oxidation life

Shroud covers for buckets of gas turbines sometimes overlap one another. To repair a shroud cover overlap and preclude further overlap during turbine operation, a first weld bead of high hardness material is applied along the radial inside surface of the overlapping cover and adjacent an intermediate edge of the Z-shaped edges of the covers. Additional weld beads of a more ductile material are applied along the same surface behind the initial weld bead to structurally support the high hardness initially applied weld material. By building up weld material along the inside radial face of the overlapping cover adjacent the overlapped edge of the adjoining cover, the thickness of the overlapping cover is increased to preclude shroud cover overlap during further turbine operation.

Method of repairing shroud tip overlap on turbine buckets

Growing community of inventors

Delmar, NY, United States of America

Jeffrey Reid Thyssen