Patents by Inventor Canan Uslu Hardwicke
Canan Uslu Hardwicke 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).
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Patent number: 7846243Abstract: Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise ruthenium, rhenium, or a combination thereof, a Group 4 metal (e.g., hafnium, zirconium, titanium), and can further include silicon and/or germanium, where the composition results in improved aluminum diffusion properties. Also disclosed herein are articles comprising the composition.Type: GrantFiled: January 9, 2007Date of Patent: December 7, 2010Assignee: General Electric CompanyInventors: Canan Uslu Hardwicke, Ganjiang Feng, Warren Martin Miglietti
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Patent number: 7745029Abstract: Oxidation-resistant ferritic steel alloys for high temperature applications consist essentially of chromium (Cr) in an amount from about 18 to about 25 atom percent, tungsten (W) in an amount from about 0.5 to about 2 atom percent, manganese (Mn) in an amount less than about 0.8 atom percent, aluminum (Al) in an amount less than about 0.2 atom percent, silicon (Si) in an amount less than about 0.1 atom percent, and rare earth metals that includes neodymium (Nd) in an amount from about 0.002 to about 0.2 atom percent with the balance being iron (Fe). Also disclosed herein are solid oxide fuel cells that include separators formed for the oxidation resistant ferritic alloys.Type: GrantFiled: November 7, 2006Date of Patent: June 29, 2010Assignee: General Electric CompanyInventors: Melvin Jackson, Canan Uslu Hardwicke, Hari Nadathur Seshadri, Amitabh Verma, Sheela Ramasesha, Aravind Dattatrayarao Chinchure, Kaushik Vaidya
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Patent number: 7727318Abstract: Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise palladium, platinum, rhodium, or combinations thereof, hafnium, titanium, zirconium, or combinations thereof; and can further include silicon, germanium, or combinations thereof, wherein the composition results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.Type: GrantFiled: January 9, 2007Date of Patent: June 1, 2010Assignee: General Electric CompanyInventors: Ganjiang Feng, Canan Uslu Hardwicke, Melvin Robert Jackson
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Patent number: 7722729Abstract: A method for repairing an article comprises providing an article, providing a repair material, and joining said repair material to said article. The repair material comprises, in atom percent, at least about 50% rhodium; up to about 49% of a first material, said first material comprising at least one of palladium, platinum, iridium, and combinations thereof; from about 1% to about 15% of a second material, said second material comprising at least one of tungsten, rhenium, and combinations thereof; and up to about 10% of a third material, said third material comprising at least one of ruthenium, chromium, and combinations thereof. The repair material comprises an A1-structured phase at temperatures greater than about 1000° C., in an amount of at least about 90% by volume.Type: GrantFiled: October 29, 2008Date of Patent: May 25, 2010Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Liang Jiang, Ji-Cheng Zhao, Canan Uslu Hardwicke
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Publication number: 20100107595Abstract: A combined cycle power plant includes at least one gas turbine, at least one steam turbine and a heat recovery boiler in combination to produce electricity and/or process steam. The heat recovery boiler has a duct for receiving and confining gas turbine exhaust gas from the gas turbine. Heat transfer tubes for heating water and steam for use in the bottoming steam cycle (steam turbine and/or process steam) are disposed within the heat recovery boiler and have exterior surfaces in fluid communication with the gas turbine exhaust gas and interior surfaces in circulatory fluid communication with water and/or steam. A cellular material is attached to the exterior surfaces of the heat transfer tubes and operates to enhance heat transfer from the gas turbine exhaust gas to the water and/or steam.Type: ApplicationFiled: November 5, 2008Publication date: May 6, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Canan Uslu Hardwicke, Sal Albert Leone, Thomas Francis Taylor, Hua Zhang
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Patent number: 7654734Abstract: A method for evaluating the thermal exposure of a selected metal component which has been exposed to changing temperature conditions is described. The voltage distribution on a surface of the metal component, or on a metallic layer which lies over the component, is first obtained. The voltage distribution usually results from a compositional change in the metal component. The voltage distribution is then compared to a thermal exposure-voltage model which expresses voltage distribution as a function of exposure time and exposure temperature for a reference standard corresponding to the metal component. In this manner, the thermal exposure of the selected component can be obtained. A related device for evaluating the thermal exposure of a selected metal component is also described.Type: GrantFiled: May 10, 2005Date of Patent: February 2, 2010Assignee: General Electric CompanyInventors: Liang Jiang, Lawrence Bernard Kool, Melvin Robert Jackson, Canan Uslu Hardwicke, Ji-Cheng Zhao, Ann Melinda Ritter, Ching-Pang Lee
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Publication number: 20090317236Abstract: A gas turbine or turbine component partially or fully coated with a damping surface layer. The damping surface layer may have a thickness between 0.1 and 2000 microns and may be capable of dissipating vibration or modifying a resonance frequency of the gas turbine or turbine component at ambient room temperatures including operational temperatures greater than 500° F., and the damping surface layer comprises at least one of (a) at least two layers comprising a first layer of at least one hard material and a second layer comprising at least one soft material, (b) a composite comprising a nickel alloy with a heat softenable chemistry, (c) a fine-grained nickel-based superalloy, or (d) a porous metallic coating, a porous metallic and ceramic coating, or a ceramic coating.Type: ApplicationFiled: June 18, 2008Publication date: December 24, 2009Applicant: General Electric CompanyInventor: Canan Uslu Hardwicke
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Patent number: 7575418Abstract: Disclosed herein is a turbine component comprising a substrate; and a protective structure formed on the substrate, wherein the protective structure comprises an ?-? titanium alloy, a ?-titanium alloy or a near-? titanium alloy. Disclosed herein too is a process for providing a protective structure to a turbine component, comprising affixing a protective structure on a turbine component; wherein the protective structure comprises an ?-? titanium alloy, a near-? titanium alloy or a ?-titanium alloy.Type: GrantFiled: September 30, 2004Date of Patent: August 18, 2009Assignee: General Electric CompanyInventors: Michael Francis Xavier Gigliotti, Canan Uslu Hardwicke, Liang Jiang, Don Mark Lipkin, Samuel Vinod Thamboo
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Publication number: 20090139650Abstract: A method is provided for making a reverse osmosis membrane comprising flow modifier structures on one or more of its surfaces. The surface modifier structures are disposed on the membrane surface using a direct-write technique. In one embodiment, the present invention provides a method of making a reverse osmosis membrane, the method comprising providing a first membrane layer having an active surface and disposing on the active surface one or more flow modifier structures suing a direct-write technique. In an alternate embodiment, the present invention provides a method for making a polyethersulfone membrane comprising surface structures created using a direct-write technique. In yet another embodiment, the present invention provides a method for making a membrane stack assembly comprising a membrane layer and a feed carrier layer wherein a direct-write technique is used to create surface structures (flow modifier structures) on each of the membrane layer and the feed carrier layer.Type: ApplicationFiled: December 12, 2008Publication date: June 4, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Canan Uslu Hardwicke, Aaron John Avagliano, Gregory Robert Chambers, Stephen Francis Rutkowski, Edward Joseph Hall
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Publication number: 20090126833Abstract: A slurry and slurry coating process for forming a diffusion aluminide coating on a substrate, including internal surfaces within the substrate. The process involves preparing a slurry of a powder containing a metallic aluminum alloy having a melting temperature higher than aluminum, an activator capable of forming a reactive halide vapor with the metallic aluminum, and a binder containing an organic polymer. The slurry is applied to surfaces of the substrate, which is then heated to burn off the binder, vaporize and react the activator with the metallic aluminum to form the halide vapor, react the halide vapor at the substrate surfaces to deposit aluminum on the surfaces, and diffuse the deposited aluminum into the surfaces to form a diffusion aluminide coating. The process can be tailored to selectively produce an inward or outward-type coating. The binder burns off to form an ash residue that can be readily removed.Type: ApplicationFiled: November 15, 2007Publication date: May 21, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Dennis William Cavanaugh, Canan Uslu Hardwicke, Matthew James OConnell, Todd Steven Moran
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Publication number: 20090053068Abstract: Disclosed is a coating for gas turbine components including at least one material having vibration-damping properties. Further disclosed is an airfoil of a gas turbine having damped vibrational characteristics including an airfoil substrate and a coating applied to the airfoil substrate including at least one material having vibration-damping properties. A method of damping vibration of a gas turbine component includes applying a coating including at least one material having damping properties to the turbine component.Type: ApplicationFiled: August 24, 2007Publication date: February 26, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Canan Uslu Hardwicke, John McConnell Delvaux, Bradley Taylor Boyer, James William Vehr
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Publication number: 20090053424Abstract: A method for repairing an article comprises providing an article, providing a repair material, and joining said repair material to said article. The repair material comprises, in atom percent, at least about 50% rhodium; up to about 49% of a first material, said first material comprising at least one of palladium, platinum, iridium, and combinations thereof; from about 1% to about 15% of a second material, said second material comprising at least one of tungsten, rhenium, and combinations thereof; and up to about 10% of a third material, said third material comprising at least one of ruthenium, chromium, and combinations thereof. The repair material comprises an A1-structured phase at temperatures greater than about 1000° C., in an amount of at least about 90% by volume.Type: ApplicationFiled: October 29, 2008Publication date: February 26, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Melvin Robert Jackson, Liang Jiang, Ji-Cheng Zhao, Canan Uslu Hardwicke
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Patent number: 7494619Abstract: An alloy, an article comprising the alloy, and methods for manufacturing and repairing an article that employ the alloy are presented. The alloy comprises, in atom percent, at least about 50% rhodium, up to about 49% of a first material, from about 1% to about 15% of a second material, and up to about 10% of a third material. The first material comprises at least one of palladium, platinum, iridium, and combinations thereof. The second material comprises at least one of tungsten, rhenium, and combinations thereof. The third material comprises at least one of ruthenium, chromium, and combinations thereof. The alloy comprises an A1-structured phase at temperatures greater than about 1000° C., in an amount of at least about 90% by volume.Type: GrantFiled: December 23, 2003Date of Patent: February 24, 2009Assignee: General Electric CompanyInventors: Melvin Robert Jackson, Liang Jiang, Ji-Cheng Zhao, Canan Uslu Hardwicke
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Publication number: 20080264897Abstract: A method of forming a pattern comprising a plurality of recesses within a turbine component is disclosed. The method includes simultaneously dissolving a plurality of portions of a selected section of the turbine component, thereby defining the plurality of recesses of the pattern.Type: ApplicationFiled: April 30, 2007Publication date: October 30, 2008Inventors: Canan Uslu Hardwicke, Andrew Lee Trimmer, Bin Wei, Tamara Jean Kluge
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Publication number: 20080206485Abstract: A device for measuring at least one property of a material sample is disclosed. The device includes at least one sensor element which is formed by a direct-write technique. The device can be an instrument for measuring strain in the sample, or for measuring other properties or attributes of a sample, such as temperature. A turbine engine disk on which components of property-measuring devices have been direct-written is also described. Methods of forming sensor elements for property-measuring devices are disclosed.Type: ApplicationFiled: February 27, 2008Publication date: August 28, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Canan Uslu Hardwicke, Melvin Robert Jackson
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Publication number: 20080163785Abstract: Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is Nickel, or Nickel in combination with cobalt and/or iron. The compositions further comprise a lanthanide, a group 4 metal selected from hafnium, zirconium, titanium, or a combination of these, and optionally, a group 14 element selected from silicon and/or germanium. The combination results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.Type: ApplicationFiled: January 9, 2007Publication date: July 10, 2008Inventors: Canan Uslu Hardwicke, Ganjiang Feng, Melvin Robert Jackson
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Publication number: 20080163786Abstract: Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise palladium, platinum, rhodium, or combinations thereof, hafnium, titanium, zirconium, or combinations thereof, and can further include silicon, germanium, or combinations thereof, wherein the composition results in improved Al retention properties. Also disclosed herein are articles comprising the coatings.Type: ApplicationFiled: January 9, 2007Publication date: July 10, 2008Inventors: Ganjiang FENG, Canan Uslu Hardwicke, Melvin Robert Jackson
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Publication number: 20080163784Abstract: Improved compositions are described for the protection of gas turbine parts at elevated temperatures. The compositions are of the MCrAlY type, wherein M is selected from nickel, or a combination of nickel with cobalt, iron, or combinations thereof. The compositions further comprise ruthenium, rhenium, or a combination thereof, a Group 4 metal (e.g., hafnium, zirconium, titanium), and can further include silicon and/or germanium, where the composition results in improved aluminum diffusion properties. Also disclosed herein are articles comprising the composition.Type: ApplicationFiled: January 9, 2007Publication date: July 10, 2008Inventors: Canan Uslu Hardwicke, Ganjiang Feng, Warren Martin Miglietti
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Publication number: 20080142126Abstract: A metallic structure having a graded microstructure is provided. The metallic structure comprises a graded region comprising a plurality of grains having a gradient in grain size varying as a function of position between a first median grain size at an outer region and a second median grain size at an inner region and a plurality of dispersoids dispersed within the microstructure. The first median grain size is different from the second median grain size. A method of forming a metallic structure having a graded microstructure is also provided. The method comprises: providing a metallic structure comprising at least one reactive species; diffusing at least one reactant at a controlled rate from an outer region of the metallic structure towards an inner region of the metallic structure to form a gradient in reactant activity; reacting the reactant with the reactive species to form a plurality of dispersoids; and heat treating the metallic structure to achieve grain growth so as to form a graded microstructure.Type: ApplicationFiled: December 14, 2006Publication date: June 19, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: MICHAEL FRANCIS XAVIER GIGLIOTTI, PAZHAYANNUR RAMANATHAN SUBRAMANIAN, SUNDAR AMANCHERLA, KRISHNAMURTHY ANAND, DHEEPA SRINIVASAN, CANAN USLU HARDWICKE
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Publication number: 20080107947Abstract: Oxidation-resistant ferritic steel alloys for high temperature applications consist essentially of chromium (Cr) in an amount from about 18 to about 25 atom percent, tungsten (W) in an amount from about 0.5 to about 2 atom percent, manganese (Mn) in an amount less than about 0.8 atom percent, aluminum (Al) in an amount less than about 0.2 atom percent, silicon (Si) in an amount less than about 0.1 atom percent, and rare earth metals that includes neodymium (Nd) in an amount from about 0.002 to about 0.2 atom percent with the balance being iron (Fe). Also disclosed herein are solid oxide fuel cells that include separators formed for the oxidation resistant ferritic alloys.Type: ApplicationFiled: November 7, 2006Publication date: May 8, 2008Inventors: Melvin Jackson, Canan Uslu Hardwicke, Hari Nadathur Seshadri, Amitabh Verma, Sheela Ramasesha, Aravind Dattatrayarao Chinchure, Kaushik Vaidya