公开(公告)号：US20190077692A1

公开(公告)日：2019-03-14

申请号：US16057925

申请日：2018-08-08

Applicant: General Electric Company

Inventor： Atanu SAHA ,  Don Mark Lipkin ,  Satya Kishore Manepalli ,  Nicholas Edward Antolino

IPC: C03B19/06 ,  F01D5/00

Abstract: A method for forming a patch repair on a silicon-based component is disclosed. The method includes applying a patch on a damaged area of a silicon-based component, drying the patch to form a dried patch, and sintering in situ the dried patch to form a patch repaired portion of the silicon-based component. The patch includes a patching material and the patching material includes a plurality of nanoparticles having a median particle size less than 100 nanometers. The plurality of nanoparticles includes at least one of silicon, silicon alloy, silica, or a metal silicate.

公开(公告)号：US20170326587A1

公开(公告)日：2017-11-16

申请号：US15533829

申请日：2015-12-01

Applicant: General Electric Company

Inventor： Atanu SAHA ,  Gopi Chandran RAMACHANDRAN ,  Mamatha NAGESH ,  Shalini THIMMEGOWDA ,  Bala Srinivasan PARTHASARATHY

IPC: B05D7/00 ,  B05D7/14 ,  B05D1/02 ,  C09D183/04 ,  B05D1/18 ,  F04D7/04 ,  F04D29/043 ,  F04D29/053 ,  F04D29/42 ,  F04D29/52 ,  B63H5/16

CPC classification number: B05D7/546 ,  B05D1/02 ,  B05D1/18 ,  B05D7/14 ,  B05D2202/00 ,  B32B25/20 ,  B32B2250/02 ,  B32B2250/248 ,  B32B2383/00 ,  B63H5/165 ,  C08G77/12 ,  C08G77/20 ,  C09D183/04 ,  F04D7/04 ,  F04D17/00 ,  F04D29/043 ,  F04D29/053 ,  F04D29/403 ,  F04D29/4206 ,  F04D29/522 ,  F05D2300/437 ,  F05D2300/611 ,  C08L83/00

Abstract: A silicone bond coat composition having a viscosity of less than 1,600 centistokes is applied to substantially all external surfaces of the article and then cured. A liquid silicone elastomer outer coat composition comprising a high viscosity first liquid silicone elastomer formulation and a low viscosity second liquid silicone elastomer formulation is then applied and cured to provide a protected article having a complex shape. Optimal coatings result from a careful balancing of component viscosities. In an embodiment, the first formulation has a viscosity greater than 300,000 centistokes, and the second formulation has a viscosity less than 6,000 centistokes, and the liquid silicone elastomer outer coat composition comprises from about 60 to about 40 percent by weight of the first formulation and from about 40 to about 60 percent by weight of the second liquid silicone elastomer formulation.

公开(公告)号：US20180050964A1

公开(公告)日：2018-02-22

申请号：US15243005

申请日：2016-08-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Kevin Paul MCEVOY ,  James RUUD ,  Lawrence E. SZALA ,  Susan CORAH ,  Atanu SAHA ,  Hrishikesh KESHAVAN

IPC: C04B35/48 ,  C23C4/134 ,  C23C14/22 ,  C04B35/64 ,  C04B35/622

CPC classification number: C04B35/48 ,  C04B35/62222 ,  C04B35/64 ,  C04B41/009 ,  C04B41/5042 ,  C04B41/87 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/9607 ,  C23C4/11 ,  C23C4/134 ,  C23C14/221 ,  C23C28/3455 ,  F01D5/005 ,  F01D5/288 ,  F05B2230/80 ,  F05B2230/90 ,  F05C2203/0895 ,  F05D2300/2118 ,  Y02T50/6765 ,  C04B41/4539 ,  C04B41/4547

Abstract: The present invention is directed to repair compositions for thermal barrier coatings and methods of use thereof. The repair compositions include a ceramic composition, a colloidal solution, an aqueous binder, an aqueous dispersant, and an aqueous ammonia solution. The ceramic composition includes a first population of yttria-stabilized zirconia particles having a mean diameter from about 250 nm to about 1000 nm, a second population of yttria-stabilized zirconia particles having a mean diameter from about 2 μm to about 10 μm, and a third population of yttria-stabilized zirconia particles having a mean diameter from about 20 μm to about 250 μm. One method includes depositing the repair layer onto the damaged region, the repair layer including the repair composition, and heat treating the repair layer.

公开(公告)号：US20170247787A1

公开(公告)日：2017-08-31

申请号：US15431805

申请日：2017-02-14

Applicant: General Electric Company

Inventor： Atanu SAHA ,  Nicholas Edward ANTOLINO ,  Don Mark LIPKIN

IPC: C23C8/62 ,  C23C12/00 ,  C04B35/505

Abstract: Methods of forming an environmental barrier coating are disclosed. A method includes disposing a powder-based coating on a substrate, heat-treating the powder-based coating at a temperature greater than 800° C. and less than 1200° C. to form a porous coating that includes surface-connected pores, infiltrating at least some of the surface-connected pores of the porous coating with an infiltrant material to form an infiltrated coating, and sintering the infiltrated coating at a temperature greater than 1200° C. and less than 1500° C. to form the environmental barrier coating on the substrate.