Patents by Inventor Krishnamurthy Anand

Krishnamurthy Anand has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10436702
    Abstract: A corrosion monitoring system includes at least one corrosion sensor. The corrosion sensor includes a metallic plug having at least one opening, at least one ceramic sheath in the opening of the metallic plug, and a plurality of probes. Each probe has a central portion with a predetermined cross sectional area extending from the metallic plug. The ceramic sheath electrically isolates each first end and each second end of the probes from the metallic plug and the other first ends and second ends. The probes are sized to provide a distribution of predetermined cross sectional areas of the central portions. The corrosion monitoring system also includes a resistance meter measuring an ohmic resistance for at least one of the probes and a computer determining a corrosion rate by correlating a rate of change of the ohmic resistance to the corrosion rate of the probe.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: October 8, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Krishnamurthy Anand, Paul Stephen Dimascio, Sundar Amancherla, Rebecca E. Hefner
  • Publication number: 20190040800
    Abstract: A system includes a turbine combustor and one or more supply circuits configured to supply one or more fluids to the turbine combustor. The one or more supply circuits include at least a liquid fuel supply circuit fluidly coupled to a liquid fuel source and configured to supply a liquid fuel from the liquid fuel source to the turbine combustor. The system also includes a corrosion inhibitor injection system including a magnesium source storing a magnesium-based inhibitor that includes magnesium oxide (MgO) and an yttrium source storing an yttrium-based inhibitor that includes yttrium oxide (Y2O3). The corrosion inhibitor injection system is fluidly coupled to the turbine combustor and the one or more supply circuits, and is configured to inject the magnesium-based inhibitor and the yttrium-based inhibitor as vanadium corrosion inhibitors into the turbine combustor or the one or more supply circuits.
    Type: Application
    Filed: July 9, 2018
    Publication date: February 7, 2019
    Inventors: Pierre Olivier MONTAGNE, Sundar AMANCHERLA, Krishnamurthy ANAND, David Terry TRAYHAN, JR., Matthieu Paul Frederic VIERLING, Maher ABOUJAIB, Abdurrahman Abdallah KHALIDI
  • Patent number: 10184091
    Abstract: A process based on the combined use of yttrium and magnesium to inhibit vanadium corrosion of high temperature parts of thermal equipment. The combined use of yttrium and magnesium, applied in a variable yttrium/magnesium ratio, compared with conventional magnesium inhibition, may reduce emission of magnesium vanadate and minimize losses of performance due to fouling of the high temperature parts, including in the presence of alkali metals. Further, compared with inhibition based on yttrium alone, it may reduce the inhibition cost and reinforce the protection against combined vanadium pentoxide and sodium sulfate corrosion.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: January 22, 2019
    Assignee: General Electric Company
    Inventors: Pierre Olivier Montagne, Sundar Amancherla, Krishnamurthy Anand, David Terry Trayhan, Jr., Matthieu Paul Frederic Vierling, Maher Aboujaib, Abdurrahman Abdallah Khalidi
  • Patent number: 10041361
    Abstract: A composition for a reinforced metal matrix coating, and a method of preparing and coating the composition. The composition includes a plurality of sacrificial metallic binder particles that is anodic with respect to a base substrate, and a plurality of hard particles.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: August 7, 2018
    Assignee: General Electric Company
    Inventors: Krishnamurthy Anand, Surinder Singh Pabla, Eklavya Calla
  • Patent number: 9995169
    Abstract: A process of forming a calcium-magnesium-aluminosilicate (CMAS) penetration resistant coating, and a CMAS penetration resistant coating are disclosed. The process includes providing a thermal barrier coating having a dopant, and exposing the thermal barrier coating to calcium-magnesium-aluminosilicate and gas turbine operating conditions. The exposing forming a calcium-magnesium-aluminosilicate penetration resistant layer. The coating includes a thermal barrier coating composition comprising a dopant selected from the group consisting of rare earth elements, non-rare earth element solutes, and combinations thereof. Additional or alternatively, the coating includes a thermal barrier coating and an impermeable barrier layer or a washable sacrificial layer positioned on an outer surface of the thermal barrier coating.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: June 12, 2018
    Assignee: General Electric Company
    Inventors: Jon Conrad Schaeffer, Surinder Singh Pabla, Paul Stephen Dimascio, Krishnamurthy Anand, Joshua Lee Margolies, Padmaja Parakala
  • Patent number: 9896585
    Abstract: A coating, a coating system, and a coating method are provided. The coating includes between about 0.25-35% filler particles embedded in a chrome phosphate binder matrix comprising a balance of the coating by volume. The filler particles have a size in the range from nanosize to six microns with an aspect ratio of from 1:1 to 3:1, and include up to 100% by weight lubricious particles with a balance hard particles. The lubricious particles are selected from the group consisting of boron nitride (BN), titanium nitride (TiN), titanium oxide (TiO2), zinc (Zn), tin (Sn), oxides of zinc and tin, and combinations thereof. The hard particles are selected from the group consisting of chromium carbide (CrC), tungsten carbide (WC), silicon (Si), aluminum (Al), oxides or nitrides of silicon and aluminum, and combinations thereof. A green slurry coating includes an evaporable solvent mixed with the filler particles and chrome phosphate binder matrix.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: February 20, 2018
    Assignee: General Electric Company
    Inventors: Surinder Singh Pabla, Krishnamurthy Anand
  • Patent number: 9816392
    Abstract: A method for fabricating thermal barrier coatings. The thermal barrier coatings are produced with a fine grain size by reverse co-precipitation of fine powders. The powders are then sprayed by a solution plasma spray that partially melts the fine powders while producing a fine grain size with dense vertical cracking. The coatings comprise at least one of 45%-65% Yb2O3 the balance zirconia (zirconium oxide), Yb/Y/Hf/Ta the balance zirconia (zirconium oxide) and 2.3-7.8% La, 1.4-5.1% Y and the balance zirconia (zirconium oxide) and are characterized by a thermal conductivity that is about 25-50% lower than that of thermal barrier coatings comprising YSZ. The thermal barrier coatings also are characterized by at least one of excellent erosion resistance, fracture toughness and abrasion resistance.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: November 14, 2017
    Assignee: General Electric Company
    Inventors: Padmaja Parakala, Surinder Singh Pabla, Joshua Lee Margolies, James Anthony Ruud, Krishnamurthy Anand, Jon Conrad Schaeffer
  • Publication number: 20170322143
    Abstract: A corrosion monitoring system includes at least one corrosion sensor. The corrosion sensor includes a metallic plug having at least one opening, at least one ceramic sheath in the opening of the metallic plug, and a plurality of probes. Each probe has a central portion with a predetermined cross sectional area extending from the metallic plug. The ceramic sheath electrically isolates each first end and each second end of the probes from the metallic plug and the other first ends and second ends. The probes are sized to provide a distribution of predetermined cross sectional areas of the central portions. The corrosion monitoring system also includes a resistance meter measuring an ohmic resistance for at least one of the probes and a computer determining a corrosion rate by correlating a rate of change of the ohmic resistance to the corrosion rate of the probe.
    Type: Application
    Filed: May 9, 2016
    Publication date: November 9, 2017
    Inventors: Krishnamurthy ANAND, Paul Stephen DIMASCIO, Sundar AMANCHERLA, Rebecca E. HEFNER
  • Publication number: 20170253821
    Abstract: A gas turbine process includes supplying a fuel to a gas turbine, combusting the fuel in the gas turbine with a hot gas path temperature reaching at least 1100° C. during operation of the gas turbine, and supplying an inhibition composition including at least one yttrium-containing inorganic compound to interact with the vanadium and inhibit vanadium hot corrosion in the gas turbine caused by vanadium as a fuel impurity in the fuel. A process includes supplying an inhibition composition including at least one yttrium-containing inorganic compound to a hot gas path or a combustor of a gas turbine. A fuel composition includes a fuel including at least one fuel impurity including vanadium and an inhibition composition including at least one yttrium-containing compound. An atomic ratio of yttrium to vanadium in the fuel composition is in a range of 1 to 1.5.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 7, 2017
    Inventors: Pierre MONTAGNE, Krishnamurthy ANAND, Prajina BHATTACHARYA, Paul Stephen DIMASCIO, Jeffrey Scott GOLDMEER, Abdurrahman Abdallah KHALIDI, Praveen Babulal JAIN, Adarsh SHUKLA, Eklavya CALLA, Paul Burchell GLASER
  • Publication number: 20170175570
    Abstract: A system for coating a component is provided. The system includes a feedstock supply, a carrier fluid supply, and a thermal spray gun coupled in flow communication with the feedstock supply and the carrier fluid supply. The feedstock supply contains a substantially homogeneous powder mixture of a first powder and a second powder. The second powder is softer than the first powder and has a percentage by mass of the powder mixture of between about 0.1% and about 3.0%.
    Type: Application
    Filed: December 22, 2015
    Publication date: June 22, 2017
    Inventors: Eklavya Calla, Joydeep Pal, Krishnamurthy Anand
  • Publication number: 20170158978
    Abstract: A process based on the combined use of yttrium and magnesium to inhibit vanadium corrosion of high temperature parts of thermal equipment. The combined use of yttrium and magnesium, applied in a variable yttrium/magnesium ratio, compared with conventional magnesium inhibition, may reduce emission of magnesium vanadate and minimize losses of performance due to fouling of the high temperature parts, including in the presence of alkali metals. Further, compared with inhibition based on yttrium alone, it may reduce the inhibition cost and reinforce the protection against combined vanadium pentoxide and sodium sulfate corrosion.
    Type: Application
    Filed: December 2, 2016
    Publication date: June 8, 2017
    Inventors: Pierre Olivier Montagne, Sundar Amancherla, Krishnamurthy Anand, David Terry Trayhan, JR., Matthieu Paul Frederic Vierling, Maher Aboujaib, Abdurrahman Abdallah Khalidi
  • Patent number: 9650705
    Abstract: A titanium aluminide application process and article with a titanium aluminide surface are disclosed. The process includes cold spraying titanium aluminide onto an article within a treatment region to form a titanium aluminide surface. The titanium aluminide surface includes a refined gamma/alpha2 structure and/or the titanium aluminide is cold sprayed from a solid feedstock of a pre-alloyed powder.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: May 16, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Jon Conrad Schaeffer, Krishnamurthy Anand, Sundar Amancherla, Eklayva Calla
  • Patent number: 9598973
    Abstract: A seal system, for an apparatus that includes a rotatable portion with airfoils coupled thereto and a stationary portion with an inner surface, includes an abradable portion including at least one abradable layer of an abradable material formed over the inner surface. The seal system also includes an abrading portion disposed over at least a portion of a substrate of the airfoil. The abrading portion includes at least one abrading layer formed on at least a portion of the substrate and a plurality of abrasive particles embedded within the abrading layer. The plurality of abrasive particles includes at least one of substantially all of one of tantalum carbide (TaC), aluminum oxide (Al2O3), and ziconia (ZrO2), cubic boron nitride (cBN) and Al2O3 in predetermined ratios, cBN, Al2O3 and ZrO2 in predetermined ratios, Al2O3 and ZrO2 fused together in predetermined ratios, and TaC and Al2O3 in predetermined ratios.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 21, 2017
    Assignee: General Electric Company
    Inventors: Farshad Ghasripoor, Iacopo Giovannetti, Massimo Giannozzi, Krishnamurthy Anand, Nuo Sheng, Nicole Barbara Piche, Luc Stephane LeBlanc, Wayne Charles Hasz, Warren Arthur Nelson, Paul Matthew Thomas, Dennis Michael Gray
  • Patent number: 9365932
    Abstract: A compressor blade for use in a compressor section of a gas turbine engine, comprising: a martensitic stainless steel compressor blade and an abrasive coating having an anodic component. The compressor blade has a blade portion, a dovetail portion and a platform portion intermediate the blade portion and the dovetail portion, the blade portion terminating in a tip opposite the dovetail portion. A cobalt-based coating overlies at least the blade portion of the compressor blade. The cobalt-based coating comprises a cobalt based material that includes precipitates of tungsten carbide that provide erosion resistance and particles of a sacrificial metal-based material distributed through the cobalt-based coating that provide galvanic corrosion resistance to the system.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: June 14, 2016
    Assignee: General Electric Company
    Inventors: Krishnamurthy Anand, Yuk-Chiu Lau, Paul Mathew, Surinder Singh Pabla, Guruprasad Sundararajan, Mohandas Nayak
  • Publication number: 20160145728
    Abstract: A titanium aluminide application process and article with a titanium aluminide surface are disclosed. The process includes cold spraying titanium aluminide onto an article within a treatment region to form a titanium aluminide surface. The titanium aluminide surface includes a refined gamma/alpha2 structure and/or the titanium aluminide is cold sprayed from a solid feedstock of a pre-alloyed powder.
    Type: Application
    Filed: May 17, 2013
    Publication date: May 26, 2016
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Jon Conrad SCHAEFFER, Krishnamurthy Anand, Sundar Amancherla, Eklayva Calla
  • Publication number: 20160115797
    Abstract: A coated article and a method for producing a coating are disclosed. The method for producing a coating includes providing an iron-based alloy substrate, and depositing a protective coating over a surface of the iron-based alloy substrate. The protective coating includes a cobalt-chromium-based coating material having at least one anodic element distributed therein. The at least one anodic element being anodic to the iron-based alloy substrate. Another method for producing a coating includes providing an iron-based alloy substrate, depositing an underlayer including at least one anodic element over a surface of the iron-based alloy substrate, and depositing a top coat including a cobalt-chromium-based coating material over the underlayer. The at least one anodic element being anodic to the iron-based alloy substrate. The coated article includes a protective coating having at least one anodic element distributed therein deposited over a surface of an iron-based alloy substrate.
    Type: Application
    Filed: October 27, 2014
    Publication date: April 28, 2016
    Inventors: Eklavya CALLA, Krishnamurthy ANAND, Surinder Singh PABLA
  • Publication number: 20160108509
    Abstract: A composition for a reinforced metal matrix coating, and a method of preparing and coating the composition. The composition includes a plurality of sacrificial metallic binder particles that is anodic with respect to a base substrate, and a plurality of hard particles.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 21, 2016
    Inventors: Krishnamurthy Anand, Surinder Singh Pabla, Eklavya Calla
  • Publication number: 20160102212
    Abstract: A coating, a coating system, and a coating method are provided. The coating includes between about 0.25-35% filler particles embedded in a chrome phosphate binder matrix comprising a balance of the coating by volume. The filler particles have a size in the range from nanosize to six microns with an aspect ratio of from 1:1 to 3:1, and include up to 100% by weight lubricious particles with a balance hard particles. The lubricious particles are selected from the group consisting of boron nitride (BN), titanium nitride (TiN), titanium oxide (TiO2), zinc (Zn), tin (Sn), oxides of zinc and tin, and combinations thereof. The hard particles are selected from the group consisting of chromium carbide (CrC), tungsten carbide (WC), silicon (Si), aluminum (Al), oxides or nitrides of silicon and aluminum, and combinations thereof. A green slurry coating includes an evaporable solvent mixed with the filler particles and chrome phosphate binder matrix.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 14, 2016
    Inventors: Surinder Singh PABLA, Krishnamurthy ANAND
  • Publication number: 20150308275
    Abstract: A coating method and a coated article are disclosed. Forming a coating includes providing a substrate having a substrate surface, forming on the substrate surface at least one bond coating layer defining a bond coating surface, and forming on the bond coating surface at least one oxide coating layer defining an oxide coating surface. A coated article includes a substrate having the coating formed thereupon. The oxide coating layer is more resistive to increasing the oxide coating surface roughness (Ra) than either the bond coating layer is resistive to increasing the bond coating surface roughness (Ra) or the substrate is resistive to increasing the substrate surface roughness (Ra).
    Type: Application
    Filed: April 29, 2014
    Publication date: October 29, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Surinder Singh PABLA, Krishnamurthy ANAND, Prajina BHATTACHARYA, Bala Srinivasan PARTHASARATHY, Arun KUMAR
  • Publication number: 20150247413
    Abstract: A coated article and a method for producing a coating are disclosed. Producing the coating includes providing a substrate defining a substrate surface having a substrate erosion resistance and applying a matrix and ceramic particles to the substrate surface. The matrix includes an anodic material having an anodic erosion resistance. The ceramic particles include a first ceramic having a first ceramic erosion resistance and a second ceramic having a second ceramic erosion resistance. The first ceramic erosion resistance is greater than the second ceramic erosion resistance, greater than the anodic erosion resistance, and greater than the substrate erosion resistance. The second ceramic interacts inchoately with the anodic material during the applying to form modified ceramic particles and modified anodic material formations. The modified ceramic particles are capable of forming a passive oxide film. The coated article includes the substrate and the coating on the substrate surface.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 3, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Surinder Singh PABLA, Krishnamurthy ANAND, Murali Krishna KALAGA, Padmaja PARAKALA, Bala Srinivasan PARTHASARATHY