Henry C Mcguigan

US Patent:

6503441, Jan 7, 2003

Filed:

May 30, 2001

Appl. No.:

09/681735

Inventors:

Gregory Scot Corman - Ballston Lake NY
Milivoj Konstantin Brun - Ballston Lake NY
Henry Charles McGuigan - Duanesburg NY

Assignee:

General Electric Company - Niskayuna NY

International Classification:

C04B 3565

US Classification:

264635, 264632, 264640, 264642, 264643, 264 291, 264 297, 264682, 427228

Abstract:

A method for producing shaped articles of ceramic composites provides a high degree of dimensional tolerance to these articles. A fiber preform is disposed on a surface of a stable formed support, a surface of which is formed with a plurality of indentations, such as grooves, slots, or channels. Precursors of ceramic matrix materials are provided to the fiber preform to infiltrate from both sides of the fiber preform. The infiltration is conducted under vacuum at a temperature not much greater than a melting point of the precursors. The melt-infiltrated composite article substantially retains its dimension and shape throughout the fabrication process.

US Patent:

6820334, Nov 23, 2004

Filed:

Apr 19, 2002

Appl. No.:

10/063404

Inventors:

Anteneh Kebbede - Albany NY
Milivoj Konstantin Brun - Ballston Lake NY
Krishan Lal Luthra - Niskayuna NY
Henry Charles McGuigan - Duanesburg NY

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B23P 1500

US Classification:

298891

Abstract:

A method for repairing an article made of a fiber-reinforced ceramic matrix composite comprises attaching sections of a fiber-reinforced tape to the damaged area and then infiltrating the sections with the ceramic matrix or ceramic matrix precursor material. The material around the damaged area may be removed first to form a depression that is then filled with sections of the fiber-reinforced tape and further infiltrated with the ceramic matrix or ceramic matrix precursor material. The repaired article shows stress-strain curve similar to a defect-free article.

US Patent:

7708851, May 4, 2010

Filed:

Oct 25, 2005

Appl. No.:

11/163618

Inventors:

Gregory Scot Corman - Ballston Lake NY, US
Henry Charles McGuigan - Duanesburg NY, US
Milivoj Konstantin Brun - Ballston Lake NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B32B 9/00

US Classification:

156 8926, 156 8911

Abstract:

A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.

US Patent:

8043720, Oct 25, 2011

Filed:

Apr 8, 2009

Appl. No.:

12/420686

Inventors:

Gregory Scot Corman - Ballston Lake NY, US
Henry Charles McGuigan - Duanesburg NY, US
Milivoj Konstantin Brun - Ballston Lake NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B32B 7/02
B32B 9/04
B32B 29/00

US Classification:

428689, 428446, 428408

Abstract:

A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.

US Patent:

20070096371, May 3, 2007

Filed:

Oct 27, 2005

Appl. No.:

11/163699

Inventors:

Henry McGuigan - Duanesburg NY, US
Gregory Corman - Ballston Lake NY, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

B29C 33/58
B28B 3/00
C04B 33/32
B28B 1/00
B28B 5/00
C04B 35/64
C04B 33/36

US Classification:

264640000, 264650000, 264316000

Abstract:

A process for producing CMC articles, such as turbine components. The process entails applying a release sheet to a drum and then forming on the drum an impregnated tape that overlies the release sheet. The tape comprises a slurry mixture containing a ceramic precursor material and a unidirectionally-oriented filamentary material that may be wound onto the drum dry or already impregnated with the mixture. A second release sheet may be applied to overlie the tape. Alternatively, the filamentary material may be impregnated with the slurry mixture after it has been wound and removed from the drum. The resulting laminate structure may then be passed through an apparatus that flattens the tape and redistributes the slurry mixture within the tape.

US Patent:

20070099527, May 3, 2007

Filed:

Nov 1, 2005

Appl. No.:

11/263715

Inventors:

Milivoj Konstantin Brun - Ballston Lake NY, US
Krishan Lal Luthra - Schenectady NY, US
Henry Charles McGuigan - Duanesburg NY, US
Gregory Scot Corman - Ballston Lake NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B32B 17/02
D03D 15/00
B32B 5/08
D04H 3/05
D04H 1/74

US Classification:

442185000, 442218000, 442219000, 442269000, 442366000, 442368000

Abstract:

In a method of coating a CMC fiber, a multiplicity of fiber tows aligned as a ribbon are simultaneously passed through a reactor and a flow of fiber coating reactant is passed though the reactor to coat the tow fibers. A coating system comprises a reactor chamber to accommodate a multiplicity of fiber tows passing along a path substantially parallel to a longitudinal axis of the chamber and a flow of fiber coating reactant and an aligning structure at an end of the chamber to maintain the multiplicity of fiber tows in a narrow, elongated ribbon configuration. An article comprises a multiplicity of fiber tows aligned in a longitudinal planar array in the form of a ribbon.

US Patent:

20100284810, Nov 11, 2010

Filed:

May 7, 2009

Appl. No.:

12/437024

Inventors:

Gregory Scot Corman - Ballston Lake NY, US
Henry Charles McGuigan - Duanesburg NY, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

F01D 5/22
B29C 65/02
B28B 1/52
B29C 67/20

US Classification:

416179, 264229, 264 44

Abstract:

A process for inhibiting delamination in a bend of a component formed of a continuous fiber-reinforced composite material having layers containing arrays of unidirectional fibrous elements in a matrix material. A preform of the component is formed by laying-up prepreg tapes corresponding to layers of the component. Each tape contains a matrix precursor, a binder, and an array of the fibrous elements. The tapes are laid-up so that the fibrous elements of at least a first tape traverse the bend, and the fibrous elements lie in planes that are not perpendicular to the axis of curvature of the bend. The preform then undergoes thermal processing, during which delamination of the layers in the bend is inhibited as a result of none of the fibrous elements lying in a plane perpendicular to the axis of curvature of the bend.

US Patent:

47693495, Sep 6, 1988

Filed:

Dec 3, 1986

Appl. No.:

6/937272

Inventors:

William B. Hillig - Ballston Lake NY
Henry C. McGuigan - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

C04B 3576

US Classification:

501 95

Abstract:

A process for producing a slip cast ceramic body which comprises preparing a slip comprised of a suspension of ceramic material in a liquid vehicle, said ceramic material being comprised of a mixture of whiskers and particulates wherein the volume ratio of whiskers to particulates ranges from about 1:5 to about 1:1, said ceramic material being present in an amount greater than 4% by volume of the slip, said whiskers being present in an amount greater than about 2% by volume of said slip, and casting the slip in a porous mold.