公开(公告)号：US20200339483A1

公开(公告)日：2020-10-29

申请号：US16393360

申请日：2019-04-24

Applicant: General Electric Company

Inventor： Jason Robert Parolini ,  Canan Uslu Hardwicke ,  Srikanth Chandrudu Kottilingam ,  James Joseph Murray, III

IPC: C04B41/45

Abstract: Various embodiments include methods for densifying a melt infiltrated ceramic matrix composite (CMC) article, and a densified melt infiltrated CMC article formed thereby. Particular embodiments include a method including: providing a porous CMC preform within a first region of a casting apparatus; providing a molten densifier within a pressure head area of a second region of the casting apparatus, the first and second regions being operably connected and the molten densifier including at least one source of silicon; and applying a first pressure to the molten densifier within the pressure head, thereby infiltrating voids within the porous CMC preform with the molten densifier and forming a densified melt infiltrated CMC article.

公开(公告)号：US10384981B2

公开(公告)日：2019-08-20

申请号：US15622210

申请日：2017-06-14

Applicant: General Electric Company

Inventor： David Bruce Hall ,  James Joseph Murray ,  Jason Robert Parolini ,  Michael Alan Vallance ,  Juan Borja ,  Daniel George Norton ,  Jared Hogg Weaver ,  Daniel Gene Dunn

IPC: C04B35/64 ,  C04B35/80 ,  C04B35/628 ,  C04B35/657 ,  C04B35/117 ,  C04B35/14 ,  C04B35/18 ,  C04B35/44 ,  C04B35/56 ,  C04B35/563 ,  C04B35/573 ,  C04B35/58 ,  C04B35/584 ,  C04B35/83

Abstract: 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.

公开(公告)号：US20180362413A1

公开(公告)日：2018-12-20

申请号：US15622210

申请日：2017-06-14

Applicant: General Electric Company

Inventor： David Bruce Hall ,  James Joseph Murray ,  Jason Robert Parolini ,  Michael Alan Vallance ,  Juan Borja ,  Daniel George Norton ,  Jared Hogg Weaver ,  Daniel Gene Dunn

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/657 ,  C04B35/64

CPC classification number: C04B35/806 ,  C04B35/117 ,  C04B35/14 ,  C04B35/18 ,  C04B35/44 ,  C04B35/5603 ,  C04B35/5622 ,  C04B35/563 ,  C04B35/573 ,  C04B35/58085 ,  C04B35/584 ,  C04B35/62878 ,  C04B35/64 ,  C04B35/657 ,  C04B35/803 ,  C04B35/83 ,  C04B2235/5212 ,  C04B2235/5224 ,  C04B2235/5228 ,  C04B2235/5232 ,  C04B2235/524 ,  C04B2235/5244 ,  C04B2235/5248 ,  C04B2235/5252 ,  C04B2235/5264 ,  C04B2235/5296 ,  C04B2235/614 ,  C04B2235/616 ,  C04B2235/728 ,  C04B2235/80

Abstract: 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.

公开(公告)号：US09931818B1

公开(公告)日：2018-04-03

申请号：US15479872

申请日：2017-04-05

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jason Robert Parolini ,  Jon Conrad Schaeffer ,  Arthur S. Peck ,  Srikanth Chandrudu Kottilingam ,  Canan Uslu Hardwicke

IPC: B29C65/00 ,  B29C53/82 ,  C03B29/00 ,  C04B35/64 ,  B32B18/00 ,  B32B7/04 ,  B32B5/08 ,  B32B37/12 ,  B32B38/00 ,  C04B35/573 ,  C04B35/532 ,  C04B35/528 ,  C04B35/571 ,  C04B35/524 ,  C04B35/591 ,  C04B35/622

CPC classification number: B32B18/00 ,  B32B5/08 ,  B32B7/04 ,  B32B2305/10 ,  B32B2313/04 ,  B32B2315/02 ,  B32B2603/00 ,  C04B35/524 ,  C04B35/528 ,  C04B35/532 ,  C04B35/571 ,  C04B35/573 ,  C04B35/591 ,  C04B35/62286 ,  C04B35/6267 ,  C04B35/806 ,  C04B2235/48 ,  C04B2235/5224 ,  C04B2235/5228 ,  C04B2235/5236 ,  C04B2235/524 ,  C04B2235/5244 ,  C04B2235/5248 ,  C04B2235/616 ,  C04B2237/38 ,  C04B2237/385 ,  C04B2237/58 ,  F01D5/284

Abstract: A method for forming a CMC article is disclosed, including forming a CMC precursor ply assembly. Forming the CMC precursor ply assembly includes laying up a plurality of CMC precursor plies and entraining a melt infiltration agent to form an entrained agent supply. Each of the plurality of CMC precursor plies includes a matrix precursor and a plurality of ceramic fibers. The plurality of CMC precursor plies and the entrained agent supply are arranged to form the CMC precursor ply assembly, which includes an article conformation. The method further includes carbonizing the CMC precursor ply assembly, infusing the melt infiltration agent from the entrained agent supply into the plurality of CMC precursor plies, and densifying the CMC precursor ply assembly with the melt infiltration agent to form the CMC article.

公开(公告)号：US09839958B2

公开(公告)日：2017-12-12

申请号：US15007941

申请日：2016-01-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Junyoung Park ,  Jason Robert Parolini ,  Ibrahim Ucok

IPC: B22D27/02 ,  B22D27/08 ,  B22C9/04 ,  B22C7/02 ,  B22D27/04 ,  B22D27/20

CPC classification number: B22C9/043 ,  B22C7/02 ,  B22D27/02 ,  B22D27/04 ,  B22D27/045 ,  B22D27/08 ,  B22D27/20

Abstract: A method for making an equiaxed investment casting. The method utilizes an ultrasonic generator to send an ultrasonic pulse into molten metal in an investment casting mold. The investment casting mold is positioned within a working zone of furnace having low output induction coils for generating a convection current in molten metal. The ultrasonic pulse separates dendrites growing from the face of the mold inward into the molten metal. Instead, equiaxed grains can nucleate within the molten metal. In addition, the ultrasonic pulse and the low output induction coils circulate the molten metal as solute is rejected from solidifying equiaxed grains. The mixing reduces the effects of segregation in the solidifying alloy and assists in nucleating equiaxed grains.

公开(公告)号：US09297265B2

公开(公告)日：2016-03-29

申请号：US13693350

申请日：2012-12-04

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Ronald Ralph Cairo ,  Jason Robert Parolini ,  John McConnell Delvaux

IPC: F01D5/30 ,  F01D5/14 ,  F01D5/28

CPC classification number: F01D5/282 ,  F01D5/02 ,  F01D5/147 ,  F01D5/284 ,  F01D5/3007 ,  F01D5/3084 ,  F01D5/3092 ,  F05D2220/32 ,  F05D2240/24 ,  F05D2250/711 ,  F05D2250/712 ,  F05D2300/6033 ,  Y02T50/672

Abstract: An apparatus having reduced wear and friction between CMC-to-metal attachment and interface of the apparatus, including a CMC component having a surface. The CMC component surface is configured for sliding contact with a surface of a metal component, the sliding contact resulting in formation of debris along the contacting surfaces. The surface of the CMC component has an engineered surface feature formed therein to substantially prevent an accumulation of debris along the contacting surfaces.