Patents by Inventor John G. Goedjen

John G. Goedjen 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).

  • Thermal barrier coatings for turbine components
    Patent number: 6365281
    Abstract: A turbine component, such as a turbine blade having a metal substrate (22) is coated with a metal MCrAlY alloy layer (24) and then a thermal barrier layer (20) selected from LaAlO3, NdAlO3, La2Hf2O7, Dy3Al5O12, HO3Al3O12, ErAlO3, GdAlO3, Yb2Ti2O7, LaYbO3, Gd2Hf2O7 or Y3Al5O12.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: April 2, 2002
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Ramesh Subramanian, Stephen M. Sabol, John G. Goedjen, Kelly M. Sloan, Steven J. Vance
  • Thermal barrier and overlay coating systems comprising composite metal/metal oxide bond coating layers
    Patent number: 6306515
    Abstract: The present invention generally describes multilayer coating systems comprising a composite metal/metal oxide bond coat layer. The coating systems may be used in gas turbines.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: October 23, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: John G. Goedjen, Stephen M. Sabol, Kelly M. Sloan, Steven J. Vance
  • Thermal barrier coating
    Patent number: 6231998
    Abstract: A thermal barrier coating for hot gas path components of a combustion turbine based on a zirconia-scandia system. A layer of zirconium scandate having the hexagonal Zr3Sc4O12 structure is formed directly on a superalloy substrate or on a bond coat formed on the substrate.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: May 15, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Jeffrey Charles Bowker, Stephen M. Sabol, John G. Goedjen
  • Barrier layer for a MCrAlY basecoat superalloy combination
    Patent number: 6207297
    Abstract: A turbine component contains a substrate (22) such as a superalloy, a basecoat (24) of the type MCrAlY, and a continuous barrier layer (28) between the substrate and basecoat, where the barrier layer (28) is made of an alloy of (Re, Ta, Ru, Os)X, where X can be Ni, Co or their mixture, where the barrier layer is at least 2 micrometers thick and substantially prevents materials from both the basecoat and substrate from migrating through it.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: March 27, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Stephen M. Sabol, John G. Goedjen, Steven J. Vance
  • Gaseous modification of MCrAlY coatings
    Patent number: 6129988
    Abstract: The present invention generally describes methods for modifying MCrAlY coatings by using gaseous carburization, gaseous nitriding or gaseous carbonitriding. The modified MCrAlY coatings are useful in thermal barrier coating systems, which may be used in gas turbine engines.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: October 10, 2000
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Steven J. Vance, John G. Goedjen, Stephen M. Sabol, Kelly M. Sloan
  • Multilayer thermal barrier coating systems
    Patent number: 6106959
    Abstract: The present invention generally describes multilayer thermal barrier coating systems and methods of making the multilayer thermal barrier coating systems. The thermal barrier coating systems comprise a first ceramic layer, a second ceramic layer, a thermally grown oxide layer, a metallic bond coating layer and a substrate. The thermal barrier coating systems have improved high temperature thermal and chemical stability for use in gas turbine applications.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: August 22, 2000
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Steven J. Vance, John G. Goedjen, Stephen M. Sabol, Kelly M. Sloan
  • Bond coats for turbine components and method of applying the same
    Patent number: 6060174
    Abstract: A substrate (12) such as a superalloy turbine component is coated with a basecoat (14) of the type MCrAlY which also contains boron, where the amount of boron in the basecoat is in a concentration gradient where more boron is present near the top (16) than the bottom (20) of the basecoat (14) and boron is present in an average amount of over 0.50 wt. % throughout the basecoat cross-section (14) of the composite (10).
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: May 9, 2000
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Stephen M. Sabol, John G. Goedjen