General Electric Company

Unison Industries, Inc.

Juan Borja

Daniel Gene Dunn

Jared Hogg Weaver

Don Mark Lipkin

Robert John Filkins

Daniel George Norton

Michael Alan Vallance

Jason Robert Parolini

Subhrajit Roychowdhury

David Bruce Hall

Thomas Charles Adcock

Raghavendra Rao Adharapurapu

James Murray

Voramon Supatarawanich Dheeradhada

Anant Achyut Setlur

Joseph Darryl Michael

Peter John Desalvo

Matthew Michael Langenderfer

Matthew Jason Pittman

A method for modifying a composite component may include positioning a barrier segment between an infiltrated segment of the composite component and a green segment to form an assembly; and initiating an infiltration process. The barrier segment may have a barrier segment permeability that is lower than a permeability of the infiltrated segment, a permeability of the green segment, or both. A composite component may include an infiltrated segment infiltrated with a molten material during a prior infiltration process; a green segment that is uninfiltrated; and a barrier segment having a microstructure different from the infiltrated segment, the green segment, or both. The microstructure of the barrier segment may be configured to slow a flow of material between the infiltrated segment and the green segment during a subsequent infiltration process.

Composite components and methods for preventing flow from infiltrated component during re-infiltration

A system includes a first group of optic lenses within a focusing unit positioned along the propagation direction of a collimated laser beam, the first group of optic lenses separated by a predetermined fixed distance. The first group of optic lenses in conjunction cause the collimated beam to form as an annular beam as it passes through the first group of optic lenses. An axicon lens located distal from the first group of optic lenses along the propagation direction, the axicon lens operable to bifurcate the annular beam into two deflected collimated beam sections, and the axicon lens having a focus that causes the two deflected collimated beam sections to merge at a distance distal from the axicon lens to create an interference pattern region.

Systems and methods for direct laser melting of metals using non-diffracting laser beams

A method of furnace-less brazing of a substrate is provided. The method includes providing a substrate having a brazing region thereon; disposing braze precursor material containing a nickel powder, an aluminum powder, and a platinum group metal powder on the brazing region; and initiating an exothermic reaction of the braze precursor material such that the exothermic reaction produces a braze material that reaches a braze temperature above the liquidus temperature for the braze material. A braze precursor material is also provided.

Exothermic braze precursor material

A glow discharge tube comprising a gas-sealed envelope, a first electrode, and a second electrode. The gas-sealed envelope defining an interior with an interior surface defining a first interior portion with a first interior surface and a second interior portion with a second interior surface. The first electrode being located within the first interior portion, and the second electrode being located within and in contact with the second interior portion.

Glow discharge tube with a set of electrodes within a gas-sealed envelope

A method of furnace-less brazing of a substrate is provided. The method includes providing a substrate having a braze region thereon; disposing braze precursor material containing a nickel powder, an aluminum powder, and a platinum group metal powder on the braze region; and initiating an exothermic reaction of the braze precursor material such that the exothermic reaction produces a braze material that reaches a braze temperature above the solidus temperature of the braze material. A braze precursor material is also provided.

Methods of furnace-less brazing

Methods for preparing ceramic matrix composites using melt infiltration and chemical vapor infiltration are provided as well as the resulting ceramic matrix composites. The methods and products include the incorporation of sacrificial fibers to provide improved infiltration of the fluid infiltrant. The sacrificial fibers are removed, such as decomposed during pyrolysis, resulting in the formation of regular and elongate channels throughout the ceramic matrix composite. Infiltration of the fluid infiltrant can then take place using the elongate channels resulting in improved density and an improved ceramic matrix composite product.

Methods of forming ceramic matrix composites using sacrificial fibers and related products

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Latham, NY, United States of America

Juan Borja