Title: Method of producing an internal cavity in a ceramic matrix composite and mandrel therefor

Abstract

A process for producing an internal cavity in a CMC article and mandrels used therewith. The process entails incorporating a mandrel made of a material that is substantially absorbed during thermal treatment of a preform to form the CMC article. The mandrel material is preferably reactive with one or more constituents of the CMC preform during the thermal treatment. The material is preferably silicon or a silicon alloy.

Inventors:

Gray, Paul Edward; Roberts, III, Herbert Chidsey; Taxacher, Glenn Curtis

Issue Date:

2019-10-22

Research Org.:

General Electric Co., Schenectady, NY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1600188

Patent Number(s):

10450235

Application Number:

13/780,306

Assignee:

General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D5/282 - {Selecting composite materials, e.g. blades with reinforcing filaments}

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/6028 - Shaping around a core which is removed later

B - PERFORMING OPERATIONS B33 - ADDITIVE MANUFACTURING TECHNOLOGY B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

B33Y80/00 - Products made by additive manufacturing

B - PERFORMING OPERATIONS B28 - WORKING CEMENT, CLAY, OR STONE B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER

B28B1/54 - specially adapted for producing articles from molten material, e.g. slag {refractory ceramic materials}

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

F05D2300/6033 - Ceramic matrix composites [CMC]

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29D - PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE

B29D22/00 - Producing hollow articles

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/131 - Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B35/573 - obtained by reaction sintering {or recrystallisation}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D5/187 - {Convection cooling}
F01D5/284 - {Selection of ceramic materials}

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/6026 - Computer aided shaping, e.g. rapid prototyping

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DOE Contract Number:  

FC26-05NT42643

Resource Type:

Patent

Resource Relation:

Patent File Date: 02/28/2013

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE