Patents by Inventor Curtis Alan Johnson

Curtis Alan Johnson 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: 8047773
    Abstract: A support apparatus for a gas turbine shroud is disclosed. The apparatus includes an outer shroud block having a coupling connectable to a casing of the gas turbine and a shroud component having a forward flange and an aft flange. The shroud component is attached to the outer shroud block via the forward flange and the aft flange. The apparatus further includes a damper disposed between the outer shroud block and the shroud component and a biasing element disposed within the outer shroud block. A translational degree of freedom between the damper and the outer shroud block defines a direction of motion of the damper. The biasing element is in operable connection between the outer shroud block and the shroud component via the damper, a bias force of the biasing element directed along the direction of motion of the damper.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: November 1, 2011
    Assignee: General Electric Company
    Inventors: Kevin Leon Bruce, Ronald Ralph Cairo, Ronald Phillip Nimmer, Curtis Alan Johnson, Gregory Scot Corman, Herbert Chidsey Roberts, III
  • Publication number: 20110203281
    Abstract: An article comprises a substrate and a coating disposed over the substrate, wherein the coating comprises a monoclinic silicate phase that undergoes no solid state phase transformation reaction in the temperature range from about 1100 degrees Celsius to about 1275 degrees Celsius.
    Type: Application
    Filed: February 25, 2010
    Publication date: August 25, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Reza Sarrafi-Nour, Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra
  • Patent number: 7968217
    Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: June 28, 2011
    Assignee: General Electric Company
    Inventors: Reza Sarrafi-Nour, Krishan Lal Luthra, Peter Joel Meschter, Curtis Alan Johnson
  • Publication number: 20110097589
    Abstract: An article for use at high temperature, such as a component for a gas turbine assembly, is presented. The article comprises a substrate comprising silicon; a bondcoat disposed over the substrate, wherein the bondcoat comprises a silicide of a platinum-group metal; and a topcoat disposed over the bondcoat, wherein the topcoat comprises a ceramic material.
    Type: Application
    Filed: October 28, 2009
    Publication date: April 28, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Peter Joel Meschter, Krishan Lal Luthra, Curtis Alan Johnson
  • Patent number: 7910173
    Abstract: A thermal barrier coating and deposition process for a component intended for use in a hostile thermal environment, such as the turbine, combustor and augmentor components of a gas turbine engine. The TBC has a first coating portion on at least a first surface portion of the component. The first coating portion is formed of a ceramic material to have at least an inner region, at least an outer region overlying the inner region, and a columnar microstructure whereby the inner and outer regions comprise columns of the ceramic material. The columns of the inner region are more closely spaced than the columns of the outer region so that the inner region of the first coating portion is denser than the outer region of the first coating portion, wherein the higher density of the inner region promotes the impact resistance of the first coating portion.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: March 22, 2011
    Assignee: General Electric Company
    Inventors: Irene Spitsberg, Brett Allen Rohrer Boutwell, Robert William Bruce, Curtis Alan Johnson, Bangalore Aswatha Nagaraj, William Scott Walston, Rudolfo Viguie, Joshua Leigh Miller, Roger Dale Wustman
  • Patent number: 7910172
    Abstract: A method for fabricating a component having an environmental barrier coating. The method includes providing a component including silicon having a first coefficient of thermal expansion. A bondcoat is bonded to at least a portion of an outer surface of the component. An intermediate layer having a general composition of RE2Si2O7 is bonded to the bondcoat. The intermediate layer has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. A protective layer having a general composition of RE2SiO5 is bonded to the intermediate layer. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.
    Type: Grant
    Filed: June 13, 2009
    Date of Patent: March 22, 2011
    Assignee: General Electric Company
    Inventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour
  • Publication number: 20110052925
    Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer comprising an alkaline-earth aluminosilicate disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing alkaline-earth aluminosilicate layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.
    Type: Application
    Filed: November 16, 2007
    Publication date: March 3, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Reza Sarrafi-Nour, Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Larry Steven Rosenzweig
  • Publication number: 20110027483
    Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.
    Type: Application
    Filed: October 15, 2010
    Publication date: February 3, 2011
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Reza Sarrafi-Nour, Krishan Lal Luthra, Peter Joel Meschter, Curtis Alan Johnson
  • Publication number: 20100327537
    Abstract: Disclosed herein is a system including a motor comprising a rotor, a stator and a sealing assembly having at least one joint and a monolithic ceramic separator. Each joint of the sealing assembly is a chemical bond joint, and the monolithic ceramic separator is disposed in a gap between the rotor and the stator of the motor such that the sealing assembly hermetically isolates the rotor and the stator.
    Type: Application
    Filed: June 25, 2009
    Publication date: December 30, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Curtis Alan Johnson, Myles Standish Peterson, II, Jeremy Daniel Vandam, Timothy James Yosenick, Konrad Roman Weeber, John Russell Yagielski, Wayne Charles Hasz, Martin Mathew Morra
  • Patent number: 7749565
    Abstract: Disclosed is a coated substrate including a substrate coating applied to at least one substantially flat surface of the substrate, the coating including at least one of an axial concavity and a circumferential curvature, the substrate being configured for disposal parametrically about a moving component.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: July 6, 2010
    Assignee: General Electric Company
    Inventors: Curtis Alan Johnson, Yuk-Chiu Lau, Joshua Lee Margolies, Herbert Chidsey Roberts, III
  • Publication number: 20100159270
    Abstract: A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a combination of zirconia and hafnia (HfO2) and a stabilizer component comprising, in combination, a first co-stabilizer selected from YbO1.5, HoO1.5, ErO1.5, TmO1.5, LuO1.5, and combinations thereof, and a second co-stabilizer selected from TiO2, PdO2, VO2, GeO2, and combinations thereof. Optionally, the stabilizer component includes Y2O3. The stabilizer component is present in an amount effective to achieve the predominantly tetragonal phase in the coating.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Inventors: Ming Fu, Brian Thomas Hazel, Brett Boutwell, Tobias A. Schaedler, Curtis Alan Johnson, Don M. Lipkin, Venkat S. Venkataramani
  • Publication number: 20100159262
    Abstract: A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a combination of zirconia and hafnia (HfO2) and a stabilizer component comprising, in combination, a first co-stabilizer selected from YbO1.5, HoO1.5, ErO1.5, TmO1.5, LuO1.5, and combinations thereof, and optionally YO1.5, a second co-stabilizer selected from TiO2, PdO2, VO2, GeO2, and combinations thereof, and a third co-stabilizer comprising TaO2.5. The stabilizer component is present in an amount effective to achieve the predominantly tetragonal phase in the coating.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Inventors: Ming Fu, Brian Thomas Hazel, Brett Boutwell, Tobias A. Schaedler, Curtis Alan Johnson, Don M. Lipkin, Douglas G. Konitzer, Venkat S. Venkataramani
  • Publication number: 20100124608
    Abstract: Disclosed is a coated substrate including a substrate coating applied to at least one substantially flat surface of the substrate, the coating including at least one of an axial concavity and a circumferential curvature, the substrate being configured for disposal parametrically about a moving component.
    Type: Application
    Filed: September 29, 2006
    Publication date: May 20, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Curtis Alan Johnson, Yuk-Chiu Lau, Joshua Lee Margolies, Herbert Chidsey Roberts, III
  • Publication number: 20100015396
    Abstract: Disclosed herein is an article comprising a substrate; the substrate comprising a ceramic or a ceramic matrix composite; and a layer comprising coarse particles disposed upon the substrate; the coarse particles having an average particle size of 0.1 to about 1000 micrometers. Disclosed herein too is a method comprising disposing coarse particles on a substrate; the substrate comprising a ceramic or a ceramic matrix composite; the coarse particles having an average particle size of 0.1 to about 1000 micrometers.
    Type: Application
    Filed: July 21, 2008
    Publication date: January 21, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Curtis Alan Johnson, Reza Sarrafi-Nour, Daniel Gene Dunn
  • Publication number: 20090250153
    Abstract: A method for fabricating a component having an environmental barrier coating. The method includes providing a component including silicon having a first coefficient of thermal expansion. A bondcoat is bonded to at least a portion of an outer surface of the component. An intermediate layer having a general composition of RE2Si2O7 is bonded to the bondcoat. The intermediate layer has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. A protective layer having a general composition of RE2SiO5 is bonded to the intermediate layer. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.
    Type: Application
    Filed: June 13, 2009
    Publication date: October 8, 2009
    Applicant: General Electric Company
    Inventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour
  • Patent number: 7597966
    Abstract: A thermal barrier coating and deposition process for a component intended for use in a hostile thermal environment, such as the turbine, combustor and augmentor components of a gas turbine engine. The TBC has a first coating portion on at least a first surface portion of the component. The first coating portion is formed of a ceramic material to have at least an inner region, at least an outer region overlying the inner region, and a columnar microstructure whereby the inner and outer regions comprise columns of the ceramic material. The columns of the inner region are more closely spaced than the columns of the outer region so that the inner region of the first coating portion is denser than the outer region of the first coating portion, wherein the higher density of the inner region promotes the impact resistance of the first coating portion.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: October 6, 2009
    Assignee: General Electric Company
    Inventors: Irene Spitsberg, Brett Allen Rohrer Boutwell, Robert William Bruce, Curtis Alan Johnson, Bangalore Aswatha Nagaraj, William Scott Walston
  • Patent number: 7595114
    Abstract: An environmental barrier coating for a component including silicon that has a first coefficient of thermal expansion is provided. The environmental coating includes a silicon bondcoat that is bonded to at least a portion of an outer surface of the component. An intermediate layer is bonded to the silicon bondcoat and has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. The intermediate layer has a general composition of RE2Si2O7. A protective layer is bonded to the intermediate layer and has a general composition of RE2SiO5. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: September 29, 2009
    Assignee: General Electric Company
    Inventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour
  • Publication number: 20090220776
    Abstract: An environmental barrier coating for a component including silicon that has a first coefficient of thermal expansion is provided. The environmental coating includes a silicon bondcoat that is bonded to at least a portion of an outer surface of the component. An intermediate layer is bonded to the silicon bondcoat and has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. The intermediate layer has a general composition of RE2Si2O7. A protective layer is bonded to the intermediate layer and has a general composition of RE2SiO5. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.
    Type: Application
    Filed: December 9, 2005
    Publication date: September 3, 2009
    Inventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour
  • Publication number: 20090155554
    Abstract: An article resistant to recession in high temperature environments, and methods for making the article, are presented herein. The article comprises a substrate, an intermediate coating system disposed over the substrate, and a topcoat disposed over the intermediate coating system. The intermediate coating system comprises a separator layer comprising an oxygen getter material, and a barrier layer disposed over the separator layer, the barrier layer comprising a ceramic composition. The topcoat also comprises this ceramic composition. Moreover, at least about 50% by volume of the ceramic composition present in the barrier layer is a metastable precursor material that tends to transform over time into a product material. At least about 75% by volume of the ceramic composition present in the topcoat is the product material, and up to about 25% by volume of the ceramic composition present in the topcoat is the metastable precursor material.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 18, 2009
    Applicant: General Electric Company
    Inventors: Molly Maureen Gentleman, Peter Joel Meschter, Yungyee Jennifer Su Saak, Curtis Alan Johnson, Krishan Lal Luthra
  • Patent number: 7544394
    Abstract: In accordance with an embodiment of the invention, an article is provided. The article comprises a substrate comprised of silicon containing material, an environmental barrier coating (EBC) overlying the substrate and a thermal barrier coating (TBC) on the environmental barrier coating. The thermal barrier coating comprising a compound having a rhombohedral phase.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: June 9, 2009
    Assignee: General Electric Company
    Inventors: Brett Allen Rohrer Boutwell, Irene Spitsberg, Christine Govern, Bangalore A. Nagaraj, Brian Thomas Hazel, Ramgopal Darolia, Curtis Alan Johnson, Yan Gao, Mark Daniel Gorman