1
Steven M Burns, Sudhangshu Bose: Nondestructive, electrical impedance-based, thermal barrier coating inspection. United Technologies Corporation, Bachman & LaPointe P C, December 27, 2005: US06979991 (19 worldwide citation)

A method and apparatus are provided for inspecting a coated substrate such as a multi-layer coating on a substrate of a turbine airfoil. At each of a number of locations along the airfoil a number of frequencies of alternating current are passed through the airfoil. At least one impedance parameter ...


2
James T Beals, Joshua Persky, Dilip M Shah, Venkat Seetharaman, Sudhangshu Bose, Jacob Snyder, Keith Santeler, Carl Verner, Stephen D Murray, John Marcin, Dinesh Gupta, Daniel A Bales, Daniel Francis Paulonis, Glenn Cotnoir, John Wiedemer: Refractory metal core coatings. United Technologies Corporation, Bachman & LaPointe P C, August 18, 2009: US07575039 (17 worldwide citation)

A refractory metal core for use in a casting system has a coating for providing oxidation resistance during shell fire and protection against reaction/dissolution during casting. In a first embodiment, the coating includes at least one oxide and a silicon containing material. In a second embodiment, ...


3
Michael E Gorman, Richard D Breault, John Donahue, Sudhangshu Bose: Carbon graphite component for an electrochemical cell and method for making the component. International Fuel Cells, Gene D Fleischhauer, July 3, 1990: US04938942 (12 worldwide citation)

A method for making a carbon-graphite component, such as a fuel cell substrate, suited for use in an electrochemical cell includes forming a precursor sheet structure comprising a resin, fibers that are graphitizable, and an inorganic compound containing boron and oxygen. Various details of the meth ...


4
Sudhangshu Bose: Outer air seal for a gas turbine engine. The United States of America represented by the Secretary of the Air Force, Donald J Singer, Irwin P Garfinkle, April 19, 1994: US05304031 (9 worldwide citation)

An uncooled turbine outer air is comprised of a combination of monolithic ceramics with high temperature capability and oxidation and creep resistance, and a fiber reinforced ceramic composite with high fracture toughness. In a preferred embodiment of the invention, a fiber reinforced ceramic compos ...


5
Sudhangshu Bose, Michael E Gorman: Corrosion resistant fuel cell substrates. International Fuel Cells Corporation, McAulay Fisher Nissen & Goldberg, January 15, 1991: US04985316 (9 worldwide citation)

A porous substrate of a fuel cell electrode assembly is formed by producing a fibrous carbon precursor web by means of a conventional wet paper-making process. The precursor web is then dried and saturated with a wet resinous binder which will carbonize when heated. Substantially the entirety of all ...


6
Sudhangshu Bose, Daniel A Bales, Mark T Ucasz, Merritt W Wight, Steven M Burns, Tyrus E Royal: Thermal barrier coating utilizing a dispersion strengthened metallic bond coat. United Technologies Corporation, Bachman & LaPointe P C, December 21, 2004: US06833203 (8 worldwide citation)

The present invention relates to an overlay coating which has improved strength properties. The overlay coating comprises a deposited layer of MCrAlY material containing discrete nitride particles therein. The nitride particles are present in a volume fraction in the range of 0.1% to 15.0% and have ...


7
Raymond P Ristau, Sudhangshu Bose, Alan D Cetel: Surface preparation process for deposition of ceramic coating. United Technologies Corporation, October 19, 2004: US06805750 (8 worldwide citation)

A method of surface cleaning and controlled oxidation of superalloys is described. The method provides a thin homogeneous layer of relatively pure alpha alumina which is suited to receive and adhere to a subsequent vapor deposited coating.


8
Sudhangshu Bose, Alan D Cetel, Peter J Draghi, Norman Pietruska: Method for repairing turbine engine components. United Technologies Corporation, Bachman & LaPointe P C, April 27, 2004: US06725540 (7 worldwide citation)

The present invention relates to a method for repairing turbine engine components, such as vanes and blades, which have airfoils. The method broadly comprises removing oxidation debris from portions of the component by blending areas exhibiting thermal barrier coating spall and/or oxidation damage, ...


9
Sudhangshu Bose, Michael E Gorman: Method of making a final cell electrode assembly substrate. International Fuel Cells Corporation, William J Sapone, June 25, 1991: US05026402 (6 worldwide citation)

A porous substrate of a fuel cell electrode assembly is formed by producing a fibrous carbon precursor web by means of a conventional wet paper-making process. The precursor web is then dried and saturated with a wet resinous binder which will carbonize when heated. Substantially the entirety of all ...


10
Sudhangshu Bose, Dinesh K Gupta, Jeanine D Marcin, Nicholas E Ulion: Thermal barrier coating system utilizing localized bond coat and article having the same. United Technologies Corporation, F Tyler Morrison, September 4, 2001: US06284390 (5 worldwide citation)

A thermal barrier coating system for a superalloy substrate is disclosed. The superalloy is preferably of the type that is capable of forming an adherent alumina layer. A bond coat is applied to a local area of the substrate, so that a portion of the substrate remains exposed. The localized area is ...