公开(公告)号：US20210238101A1

公开(公告)日：2021-08-05

申请号：US17234176

申请日：2021-04-19

Applicant: General Electric Company

Inventor： Jared Hogg Weaver ,  Gregory Scot Corman ,  Krishan Lal Luthra

IPC: C04B37/00 ,  C04B35/628 ,  C04B35/80 ,  C04B35/71 ,  C23C16/04

Abstract: According to a method set forth herein a plurality of preform plies having first and second preform plies can be associated together to define a preform. The preform can be subject to chemical vapor infiltration (CVI) processing to define a ceramic matrix composite (CMC) structure.

公开(公告)号：US11066339B2

公开(公告)日：2021-07-20

申请号：US15988188

申请日：2018-05-24

Applicant: General Electric Company

Inventor： Krishan Lal Luthra

IPC: C04B41/89 ,  C04B41/00 ,  C04B41/50 ,  C04B35/78 ,  F01D5/28 ,  C04B41/52

Abstract: An article comprises a substrate comprising a ceramic matrix composite; a first layer disposed over the substrate, the first layer comprising a substantially interconnected silicon source material, and a secondary material; and a second layer disposed over the first layer, the second layer comprising a membrane material in mass transfer communication with the silicon source material.

公开(公告)号：US10927046B2

公开(公告)日：2021-02-23

申请号：US16229468

申请日：2018-12-21

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Julin Wan

IPC: C04B41/52 ,  C04B41/00 ,  C04B41/45 ,  C04B41/50 ,  C04B103/60 ,  C04B111/00 ,  C04B111/20

Abstract: A coated component, along with methods of making and using the same, is provided. The coated component includes a ceramic matrix composite (CMC) substrate comprising silicon carbide and having a surface; a mullite/NOSC bondcoat on the surface of the substrate; and an environmental barrier coating on the mullite/NOSC bondcoat. The mullite/NOSC bondcoat comprises a non-oxide silicon ceramic (NOSC) phase contained within a mullite phase, with the mullite/NOSC bondcoat comprising 60% to 95% by volume of the mullite phase, such as 65% to 93% by volume of the mullite phase.

公开(公告)号：US10584070B2

公开(公告)日：2020-03-10

申请号：US15831896

申请日：2017-12-05

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Gregory Scot Corman ,  Jared Hogg Weaver ,  Krishan Lal Luthra

IPC: C04B35/76 ,  C04B35/626 ,  C04B35/80 ,  C04B38/06 ,  F01D5/28 ,  F01D9/02

Abstract: Ceramic matrix composite articles include, for example, a plurality of unidirectional arrays of fiber tows in a matrix having a monomodal pore size distribution, and a fiber volume fraction between about 15 percent and about 35 percent. The articles may be formed by, for example, providing a shaped preform comprising a prepreg tape layup of unidirectional arrays of fiber tows, a matrix precursor, and a pore former, curing the shaped preform to pyrolyze the matrix precursor and burnout the pore former so that the shaped preform comprises the unidirectional arrays of fiber tows and a porous matrix having a monomodal pore size distribution, and subjecting the cured shaped preform to chemical vapor infiltration to densify the porous matrix so that the ceramic matrix composite article has a fiber volume fraction between about 15 percent and about 35 percent.

公开(公告)号：US20190161416A1

公开(公告)日：2019-05-30

申请号：US15822756

申请日：2017-11-27

Applicant: General Electric Company

Inventor： Krishan Lal Luthra

IPC: C04B41/50 ,  C04B41/49 ,  C04B41/45 ,  C04B41/85 ,  C04B41/90 ,  C04B35/565

Abstract: Coated components, along with methods of their formation, are provided. The coated component may include a ceramic substrate having a Si-treated layer surrounding a ceramic core and an environmental barrier coating on the Si-treated layer of the ceramic substrate. The ceramic core may include silicon carbide, and the Si-treated layer may be pretreated to tailor its surface's properties for inhibiting or delaying the formation of carbon oxides to upon exposure of the Si-treated layer to oxygen.

公开(公告)号：US10094236B2

公开(公告)日：2018-10-09

申请号：US13834350

申请日：2013-03-15

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Krishan Lal Luthra

IPC: C04B35/195 ,  F01D25/00 ,  C23C28/04 ,  F01D5/28 ,  C04B41/87 ,  C04B41/89 ,  C04B41/00 ,  C04B41/50 ,  C04B41/52 ,  C04B35/48 ,  C04B35/50 ,  C04B35/565 ,  C04B35/58 ,  C04B35/584 ,  C04B35/597 ,  C04B111/00

Abstract: The disclosure relates generally to recession resistant gas turbine engine articles that comprise a silicon containing substrate, and related coatings and methods. The present disclosure is directed, inter alia, to an engine article comprising a silicon substrate which is coated with a chemically stable porous oxide layer. The present disclosure also relates to articles comprising a substrate and a bond coat on top comprising a two phase layer of interconnected silicon and interconnected oxide, followed by a layer of silicon. The present disclosure further relates to a recession resistant article comprising an oxide in a silicon containing substrate, such that components of the silicon containing substrate is interconnected with oxides dispersed in the substrate and form the bulk of the recession resistant silicon containing article.

公开(公告)号：US12054432B2

公开(公告)日：2024-08-06

申请号：US17234176

申请日：2021-04-19

Applicant: General Electric Company

Inventor： Jared Hogg Weaver ,  Gregory Scot Corman ,  Krishan Lal Luthra

IPC: C04B35/71 ,  C04B35/628 ,  C04B35/80 ,  C04B37/00 ,  C23C16/04

CPC classification number: C04B35/71 ,  C04B35/62884 ,  C04B35/80 ,  C04B37/001 ,  C23C16/045 ,  C04B2235/5208 ,  C04B2235/5252 ,  C04B2235/614 ,  C04B2235/77 ,  C04B2235/775 ,  C04B2237/38 ,  C04B2237/586

Abstract: According to a method set forth herein a plurality of preform plies having first and second preform plies can be associated together to define a preform. The preform can be subject to chemical vapor infiltration (CVI) processing to define a ceramic matrix composite (CMC) structure.

公开(公告)号：US10954168B2

公开(公告)日：2021-03-23

申请号：US16138725

申请日：2018-09-21

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Gregory Scot Corman ,  Badri Narayan Ramamurthi

IPC: C04B35/08 ,  C04B35/80 ,  C04B35/573 ,  B32B5/02 ,  B32B7/02 ,  C23C16/02 ,  C23C16/04 ,  B05D3/10 ,  B32B5/18

Abstract: A ceramic matrix composite article includes a melt infiltration ceramic matrix composite substrate comprising a ceramic fiber reinforcement material in a ceramic matrix material having a free silicon proportion, and a chemical vapor infiltration ceramic matrix composite outer layer comprising a ceramic fiber reinforcement material in a ceramic matrix material having essentially no free silicon proportion disposed on an outer surface of at least a portion of the substrate.

公开(公告)号：US20190092699A1

公开(公告)日：2019-03-28

申请号：US15714893

申请日：2017-09-25

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Julin Wan ,  Joseph John Shiang ,  Milivoj Konstantin Brun

IPC: C04B38/00 ,  C04B35/80 ,  C04B35/573

Abstract: The present approach relates to the fabrication of a composite material via a multi-step heating process. In one heating stage an internal region of a preform is heated by application of electro-magnetic radiation. In another heating stage, a region near the surface of the preform is heated from the exterior inward.

公开(公告)号：US10093586B2

公开(公告)日：2018-10-09

申请号：US14632030

申请日：2015-02-26

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Krishan Lal Luthra ,  Gregory Scot Corman ,  Badri Narayan Ramamurthi

IPC: C23C16/30 ,  C04B35/80 ,  C04B35/573 ,  B32B5/02 ,  B32B7/02 ,  C23C16/02 ,  C23C16/04 ,  B05D3/10 ,  B32B5/18

Abstract: A method for forming a ceramic matrix composite article includes forming by melt infiltration a ceramic matrix composite substrate inducing a ceramic fiber reinforcement material in a ceramic matrix material having a free silicon proportion and forming by chemical vapor infiltration a ceramic matrix composite outer layer including a ceramic fiber reinforcement material in a ceramic matrix material having no free silicon proportion disposed on at least a portion of the substrate.