Patents by Inventor Larry Steven Rosenzweig

Larry Steven Rosenzweig 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: 10934626
    Abstract: Methods for preparing an environmental barrier coating and the resulting coating are provided. The methods and products include the incorporation of a continuous ceramic inner layer and a segmented ceramic outer layer on a CMC component. The segmented ceramic outer layer may be formed by thermal spray techniques. The coating is more stable at higher temperatures and provides for a longer lifetime of the coated component.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: March 2, 2021
    Assignee: General Electric Company
    Inventors: Julin Wan, Larry Steven Rosenzweig
  • Publication number: 20200378010
    Abstract: Methods for preparing an environmental barrier coating and the resulting coating are provided. The methods and products include the incorporation of a continuous ceramic inner layer and a segmented ceramic outer layer on a CMC component. The segmented ceramic outer layer may be formed by thermal spray techniques. The coating is more stable at higher temperatures and provides for a longer lifetime of the coated component.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Inventors: Julin Wan, Larry Steven Rosenzweig
  • Publication number: 20200165713
    Abstract: Various embodiments include a gas turbine seal and methods of forming such seal. The method of forming the seal includes forming a freestanding ceramic seal for sealing in a gas turbine by applying a ceramic material on a substrate to form a ceramic layer, removing the substrate from the ceramic layer and finishing the ceramic layer to define the freestanding ceramic seal. The method includes depositing particles of the ceramic material in one of a molten or vapor state on a surface of the substrate and quenching the ceramic material to form the ceramic layer. The ceramic material comprises yttria-stabilized zirconia having a t? tetragonal structure. A gas turbine including the freestanding ceramic seal is additionally disclosed.
    Type: Application
    Filed: July 18, 2017
    Publication date: May 28, 2020
    Inventors: Venkat Subramaniam VENKATARAMANI, Anthony Christopher MARIN, Neelesh Nandkumar SARAWATE, Stephen Francis BANCHERI, Larry Steven ROSENZWEIG
  • Publication number: 20200024718
    Abstract: The present application provides Calcia-Magnesia-Alumina-Silica (CMAS) (or molten silicate) resistant thermal barrier coatings (IBC). The coatings include elongate growth domains of non-equiaxed, randomly arranged overlapping grains or splats. The elongate growth domains include overlapping individual, randomly distributed splats of tough and soft phases. In some embodiments, the elongate growth domains are formed via air plasma spray. In some embodiments, the tough phases are at least partially stabilized zirconia and/or hafnia compositions, and the soft phases are CMAS (or molten silicate) reactive or resistant compositions. Within each elongate growth domain, the mixture of the tough and soft phases act together to limit penetration of CMAS and also provide sufficient domain toughness to minimize cracking forces produced during crystallization of infiltrated CMAS.
    Type: Application
    Filed: December 13, 2018
    Publication date: January 23, 2020
    Inventors: Larry Steven Rosenzweig, James Anthony Ruud, Shankar Sivaramakrishnan
  • Publication number: 20190367190
    Abstract: A control system includes one or more processors configured to determine when to extend a life span of an engine by applying an additional restorative coating to the engine based on one or more monitored parameters of the engine. The monitored parameters include a condition of a previously applied restorative coating. The one or more processors are configured to determine the condition of the previously applied restorative coating based on an optical response of the previously applied restorative coating. The one or more processors also are configured to direct application of the additional restorative coating based on the one or more monitored parameters of the engine.
    Type: Application
    Filed: August 13, 2019
    Publication date: December 5, 2019
    Inventors: Bernard Patrick Bewlay, Byron Andrew Pritchard, Shankar Sivaramakrishnan, Larry Steven Rosenzweig, Mehmet M. Dede, Hrishikesh Keshavan, Ambarish J. Kulkarni, Margeaux Wallace
  • Patent number: 10458254
    Abstract: Coating systems for components of a gas turbine engine, such as a compressor blade tip, are provided. The coating system can include an abradable material disposed along the compressor blade tip and may be used with a bare compressor casing. The abradable coating is softer than the compressor casing and can reduce the overall rub ratio thereby increasing the lifetime of the compressor blade and casing. Methods are also provided for applying the coating system onto a compressor blade.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: October 29, 2019
    Assignee: General Electric Company
    Inventors: Sathyanarayanan Raghavan, Neelesh Nandkumar Sarawate, Kenneth Martin Lewis, Larry Steven Rosenzweig, Changjie Sun, Ananda Barua
  • Patent number: 10415579
    Abstract: Coating systems for components of a gas turbine engine, such as a compressor blade tip, are provided. The coating system can include a ceramic material disposed along the compressor blade tip and may be used with a bare compressor casing. The ceramic coating is harder than the bare compressor casing and can reduce the rub ratio thereby increasing the lifetime of the compressor blades. Methods are also provided for applying the coating system onto a compressor blade.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 17, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Neelesh Nandkumar Sarawate, Larry Steven Rosenzweig, Sathyanarayanan Raghavan, Changjie Sun, Ananda Barua, Jinjie Shi
  • Patent number: 10364701
    Abstract: A coated component, along with methods of its formation, restoration, and use, is provided. The coated component may include a substrate defining a surface; a thermal barrier coating on the surface of the substrate; a layer of environmental contaminant compositions (e.g., CMAS) on the thermal barrier coating; and a chemical barrier coating on the layer of environmental contaminant compositions.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 30, 2019
    Assignee: General Electric Company
    Inventors: Hrishikesh Keshavan, Byron Andrew Pritchard, Jr., Shankar Sivaramakrishnan, Julie Marie Chapman, Ambarish Jayant Kulkarni, Bernard Patrick Bewlay, Mehmet M. Dede, Larry Steven Rosenzweig
  • Patent number: 10221703
    Abstract: An article having a damage-tolerant thermal barrier coating includes a plurality of coating layers disposed over a substrate. The plurality of coatings comprises an inner layer and an outer layer. The outer layer is more resistant to infiltration by nominal CMAS relative to 8 weight percent yttria-stabilized zirconia at a temperature of 1300 degrees Celsius. The inner layer has, in a temperature range from about 1000 degrees Celsius to about 1200 degrees Celsius, a thermal resistance in a range from about 9×10?5 degree Kelvin per watt to about 23×10?5 degree Kelvin per watt.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: March 5, 2019
    Assignee: General Electric Company
    Inventors: Shankar Sivaramakrishnan, Larry Steven Rosenzweig
  • Patent number: 10179945
    Abstract: The present application provides Calcia-Magnesia-Alumina-Silica (CMAS) (or molten silicate) resistant thermal barrier coatings (TBC). The coatings include elongate growth domains of non-equiaxed, randomly arranged overlapping grains or splats. The elongate growth domains include overlapping individual, randomly distributed splats of tough and soft phases. In some embodiments, the elongate growth domains are formed via air plasma spray. In some embodiments, the tough phases are at least partially stabilized zirconia and/or hafnia compositions, and the soft phases are CMAS (or molten silicate) reactive or resistant compositions. Within each elongate growth domain, the mixture of the tough and soft phases act together to limit penetration of CMAS and also provide sufficient domain toughness to minimize cracking forces produced during crystallization of infiltrated CMAS.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: January 15, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Larry Steven Rosenzweig, James Anthony Ruud, Shankar Sivaramakrishnan
  • Publication number: 20180305821
    Abstract: Methods for preparing an environmental barrier coating and the resulting coating are provided. The methods and products include the incorporation of a continuous ceramic inner layer and a segmented ceramic outer layer on a CMC component. The segmented ceramic outer layer may be formed by thermal spray techniques. The coating is more stable at higher temperatures and provides for a longer lifetime of the coated component.
    Type: Application
    Filed: April 21, 2017
    Publication date: October 25, 2018
    Inventors: Julin Wan, Larry Steven Rosenzweig
  • Publication number: 20180154392
    Abstract: A coated component, along with methods of its formation, restoration, and use, is provided. The coated component may include a substrate defining a surface; a thermal barrier coating on the surface of the substrate; a layer of environmental contaminant compositions (e.g., CMAS) on the thermal barrier coating; and a chemical barrier coating on the layer of environmental contaminant compositions.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 7, 2018
    Inventors: Hrishikesh Keshavan, Byron Andrew Pritchard, JR., Shankar Sivaramakrishnan, Julie Marie Chapman, Ambarish Jayant Kulkarni, Bernard Patrick Bewlay, Mehmet M. Dede, Larry Steven Rosenzweig
  • Publication number: 20180135646
    Abstract: Coating systems for components of a gas turbine engine, such as a compressor blade tip, are provided. The coating system can include an abradable material disposed along the compressor blade tip and may be used with a bare compressor casing. The abradable coating is softer than the compressor casing and can reduce the overall rub ratio thereby increasing the lifetime of the compressor blade and casing. Methods are also provided for applying the coating system onto a compressor blade.
    Type: Application
    Filed: November 16, 2016
    Publication date: May 17, 2018
    Inventors: Sathyanarayanan Raghavan, Neelesh Nandkumar Sarawate, Kenneth Martin Lewis, Larry Steven Rosenzweig, Changjie Sun, Ananda Barua
  • Patent number: 9938839
    Abstract: Articles suitable for use as high-temperature machine components include a substrate and an environmental barrier coating disposed over the substrate, where the environmental barrier coating includes at least one hermetic self-sealing layer formed from a mixture including an alkaline earth metal aluminosilicate and a rare-earth silicate, and where the at least one hermetic self-sealing layer exhibits substantially no net remnant or residual expansion when subjected to high temperature heat treatment. The environmental barrier coating can further include a bondcoat disposed between the substrate and the hermetic self-sealing layer, a topcoat disposed over the hermetic self-sealing layer, and/or an intermediate layer disposed between the hermetic self-sealing layer and the bondcoat. The intermediate layer can include a barrier material that is substantially inert with respect to silica.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 10, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Larry Steven Rosenzweig, Reza Sarrafi-Nour
  • Publication number: 20180087515
    Abstract: Coating systems for components of a gas turbine engine, such as a compressor blade tip, are provided. The coating system can include a ceramic material disposed along the compressor blade tip and may be used with a bare compressor casing. The ceramic coating is harder than the bare compressor casing and can reduce the rub ratio thereby increasing the lifetime of the compressor blades. Methods are also provided for applying the coating system onto a compressor blade.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 29, 2018
    Inventors: Neelesh Nandkumar Sarawate, Larry Steven Rosenzweig, Sathyanarayanan Raghavan, Changjie Sun, Ananda Barua, Jinjie Shi
  • Publication number: 20180087387
    Abstract: Coating systems for a turbine blade tip, such as a metal turbine blade tip, are provided. The coating system can include a thermal barrier coating on the surface of the turbine blade tip as well as one or more bond coats and/or metallic coatings. The coated blade tip can be used with a ceramic matrix composite shroud coated with an environmental barrier coating to reduce blade tip wear. Methods are also provided for applying the coating system onto a turbine blade tip.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 29, 2018
    Inventors: Jinjie Shi, Larry Steven Rosenzweig, Christopher Edward Wolfe, Dennis Paul Dry
  • Publication number: 20180087394
    Abstract: A turbine system including a sealing component is presented. The sealing component is positioned in a gap between adjacent turbine components of the turbine system. The sealing component includes a metallic shim including a high-temperature-resistant alloy in a single crystal form. A turbine shroud assembly including the sealing component is also presented.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 29, 2018
    Inventors: Neelesh Nandkumar Sarawate, Venkat Subramaniam Venkataramani, Anthony Christopher Marin, Stephen Francis Bancheri, Larry Steven Rosenzweig, Edip Sevincer
  • Patent number: 9869188
    Abstract: Articles having coatings that are resistant to high temperature degradation are described, along with methods for making such articles. The article comprises a coating disposed on a substrate. The coating comprises a plurality of elongated surface-connected voids. The article further includes a protective agent disposed within at least some of the voids of the coating; the protective agent comprises a substance capable of chemically reacting with liquid nominal CMAS to form a solid crystalline product outside the crystallization field of said nominal CMAS. This solid crystalline product has a melting temperature greater than about 1200 degrees Celsius. The method generally includes disposing the protective agent noted above within the surface connected voids of the coating at an effective concentration to substantially prevent incursion of CMAS materials into the voids in which the protective agent is disposed.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: January 16, 2018
    Assignee: General Electric Company
    Inventors: Kristen Hall Brosnan, Shahana Chatterjee, Wayne Charles Hasz, Mohandas Nayak, Digamber Gurudas Porob, Gopi Chandran Ramachandran, Larry Steven Rosenzweig, Shankar Sivaramakrishnan, Alok Mani Srivastava, Venkat Subramaniam Venkataramani
  • Publication number: 20170145836
    Abstract: An article having a damage-tolerant thermal barrier coating includes a plurality of coating layers disposed over a substrate. The plurality of coatings comprises an inner layer and an outer layer. The outer layer is more resistant to infiltration by nominal CMAS relative to 8 weight percent yttria-stabilized zirconia at a temperature of 1300 degrees Celsius. The inner layer has, in a temperature range from about 1000 degrees Celsius to about 1200 degrees Celsius, a thermal resistance in a range from about 9×10?5 degree Kelvin per watt to about 23×10?5 degree Kelvin per watt.
    Type: Application
    Filed: November 24, 2015
    Publication date: May 25, 2017
    Inventors: Shankar Sivaramakrishnan, Larry Steven Rosenzweig
  • Publication number: 20170101875
    Abstract: A method for coating a surface of a substrate is provided. The method includes providing a suspension or a precursor comprising feedstock material suspended in a liquid medium. Further, the method includes spraying the suspension or the precursor onto the surface at a spray angle less than about 75 degrees to a tangent of the surface.
    Type: Application
    Filed: December 20, 2016
    Publication date: April 13, 2017
    Inventors: Larry Steven Rosenzweig, James Anthony Ruud, Shankar Sivaramakrishnan