Nickel Or Cobalt Member Patents (Class 228/262.3)
  • Patent number: 8973806
    Abstract: A class of nickel based alloys having a fine grain structure resistant to stress corrosion cracking, and methods of alloy design to produce further alloys within the class are presented. The alloys act as suitable welding materials in similar applications to that of Alloy 622. The fine-grained structure of these novel alloys may also be advantageous for other reasons as well such as wear, impact, abrasion, corrosion, etc. These alloys have similar phases to Alloy 622 in that they are composed primarily of austenitic nickel, however the phase morphology is a much finer grained structure opposed to the long dendritic grains common to Alloy 622 when it is subject to cooling rates from a liquid state inherent to the welding process.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: March 10, 2015
    Assignee: Scoperta, Inc.
    Inventor: Justin Lee Cheney
  • Patent number: 8925792
    Abstract: A method of bonding superalloys is provided. The method includes: aligning a first superalloy subcomponent having a gamma-prime solvus g?1 and a second superalloy subcomponent having a gamma-prime solvus g?2, with a filler material that includes at least 1.5 wt % boron disposed between the first and second superalloy subcomponents; performing a first heat treatment at a temperature T1, where T1 is above the solidus of the filler material and below the liquidus of the filler material; and performing a second heat treatment at a temperature T2, where T2 is greater than T1, and where T2 is greater than or equal to the lower of g?1 and g?2.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: January 6, 2015
    Assignee: General Electric Company
    Inventors: Akane Suzuki, Jeffrey Jon Schoonover, David Austin Wark
  • Patent number: 8637166
    Abstract: Provided are strain hardened high strength nickel based alloy welds that yield improved properties and performance in joining high strength metals. The advantageous weldments include two or more segments of ferrous or non-ferrous components, and fusion welds, friction stir welds, electron beam welds, laser beam welds, or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a strain hardened nickel based alloy weld metal composition including greater than or equal to 10 wt % Mo based on the total weight of the nickel based alloy weld metal composition. Also provided are methods for forming the welds from the nickel based alloy weld compositions. The strain hardened high strength nickel based alloy welds are useful in the oil, gas and petrochemical industry in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: January 28, 2014
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Raghavan Ayer, Neeraj Srinivas Thirumalai, Hyun-Woo Jin, Daniel B. Lillig, Douglas Paul Fairchild, Steven Jeffrey Ford
  • Patent number: 8393528
    Abstract: A method for hardfacing a metal component surface (14, 16), especially a shroud surface of a turbine blade made of a TiAl alloy, with at least one metal material (18, 20), in particular a Co—Cr alloy. The hardfacing coating is produced separately from the component surface and is then joined to the component surface in a high-temperature soldering process. A turbine blade including such a hardfacing coating, primarily in a shroud region (2).
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: March 12, 2013
    Assignee: MTU Aero Engines GmbH
    Inventors: Karl-Hermann Richter, Ulrich Knott, Piotr Kowalczyk
  • Patent number: 8353444
    Abstract: The present invention is directed to a process for repairing cracks in a turbine engine component. The process comprises the steps of providing a component, preferably formed from a single crystal nickel based material, with at least one crack, applying a repair alloy composition containing a single crystal nickel based alloy, a first nickel based braze alloy and a second nickel based braze alloy to the crack(s), and subjecting the component with the applied repair alloy composition to a thermal cycle to diffuse the repair alloy composition into the crack(s).
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: January 15, 2013
    Assignee: United Technologies Corporation
    Inventors: Norman Pietruska, Beth Kwiatkowski Abriles, John F. Falkowski
  • Patent number: 8220697
    Abstract: A method of welding alloys having directionally-solidified grain structure. The methods improve the weldability of these alloys by creating a localized region of fine grain structure, wherein the welding occurs in these localized regions. The localized regions are formed by applying strain energy using a variety of different methods, such as by hammer peening, laser peening or sand blasting. Then, a heat treatment step may be used to create recrystallized grains having the fine grain structure. The region of fine grain structure provides better weldability.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: July 17, 2012
    Assignee: Siemens Energy, Inc.
    Inventors: Srikanth C. Kottilingam, Peter J. Ditzel
  • Patent number: 8191760
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: June 5, 2012
    Assignee: Zimmer Technology, Inc.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Patent number: 7984841
    Abstract: A member having a coating film capable of suppressing whisker generation is provided. The coating film (3) including a plurality of crystalline grains (3a) made of tin or tin alloy is formed above the surface of the base member (1). An intermetallic compound (3b) of tin and the first metal is being formed along the crystalline grain boundaries of the coating film.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: July 26, 2011
    Assignee: Fujitsu Limited
    Inventor: Seiki Sakuyama
  • Publication number: 20110100961
    Abstract: A method for welding dissimilar metals involved selecting a steel having approximately 1-3 weight % chromium (Cr) content and a first coefficient of thermal expansion at a predetermined first temperature for a first part [14], selecting a nickel-based alloy having a second coefficient of thermal expansion at a second predetermined temperature for a second part [12], the first and second coefficients of thermal expansion having a maximum difference of approximately 2-3% when the first predetermined temperature is approximately 500-550° C. and the second predetermined temperature is approximately 600-650° C., then welding the first part to the second part [12].
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: ALSTOM Technology Ltd
    Inventor: Robert E. Kilroy, JR.
  • Patent number: 7918382
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: April 5, 2011
    Assignee: Zimmer Technology, Inc.
    Inventors: Steven J. Charlebois, Leslie N. Gilbertson, Michael E. Hawkins, Dana J. Medlin, H. Ravindranath Shetty, Steven A. Zawadzki
  • Patent number: 7776454
    Abstract: A method for producing titanium alloy brazing strips and the resulting brazing strips and/or foils. The method uses a cold-rolling process without heat treating to generate a titanium based multi-layer alloy strip or foil made up of discrete layers of titanium and an additional layer or layers of one or more metals, such as zirconium, nickel and/or copper, for example, or alloys thereof, with the layer of titanium roll bonded without heat treating to the layers of the additional metal(s). The resulting strip or foil can include, for example, Cu/Ti/Cu, Ni/Ti/Ni, Ni/Ti/Cu, Cu/Ni/Ti/Ni/Cu, Ni/Cu/Ti/Cu/Ni, Ni/Cu/Ni/Ti/Ni/Cu/Ni, Ni/Zr/Cu/Ti/Cu/Zr/Ni and Ni/Ti/Cu/Zr/Cu/Ti/Ni among other combinations. The resulting strip or foil can be used for brazing, creating an alloy of the weight percentage of the original materials.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: August 17, 2010
    Assignee: EMS Solutions, Inc.
    Inventors: Chen-Chung S. Chang, Bijendra Jha, Matthew J. Pohlman
  • Patent number: 7770779
    Abstract: A guide wire includes a wire member having a first wire disposed on the distal side of the guide wire, and a second wire disposed on the proximal side from the first wire. The second wire is made from a material having an elastic modulus larger than that of the first wire. For example, the first wire is made from a superelastic alloy, and the second wire is made from a stainless steel. The first wire is joined to the second wire at a welded portion by welding. A coil is disposed on the distal side from the first wire. A cover layer is formed on the outer peripheral surface of the wire member in such a manner as to cover at least the welded portion. The cover layer is made from a material capable of reducing the friction of the cover layer, for example, a fluorocarbon resin or a hydrophilic material, to thereby improve the sliding performance of the guide wire. Such a guide wire is excellent in operationality and kink resistance.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: August 10, 2010
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Hiraku Murayama, Akihiko Umeno, Jun Iwami, Yutaka Itou, Youki Aimi
  • Patent number: 7743967
    Abstract: A chromium-free welding consumable and a method of welding stainless steel to reduce the presence of chromium emissions. The consumable is made from an alloy that reduces the emission of chromium during a welding process, and include predominantly nickel, with between approximately five and twenty five percent by weight copper, up to approximately five percent by weight of palladium, up to approximately ten percent by weight of molybdenum and up to five percent non-copper alloying ingredients. Welding consumables made from the alloy are particularly well-suited for welding austenitic stainless steels, such as type 304 stainless steel. The method involves using chromium-free weld filler material with a stainless steel base material.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: June 29, 2010
    Assignee: The Ohio State University
    Inventors: Gerald S. Frankel, John C. Lippold
  • Patent number: 7731075
    Abstract: A blade member is oscillated in the direction of arrow A-A relative to a rim of a disc; a forge force is applied radially and a weld is formed along line; the blade member is formed from a face centred cubic (FCC) nickel based single crystal alloy, such as CMSX-4 of Cannon-Muskegon Corporation; the orientation of the single crystal blade member is controlled to maximize the stress on the slip plane; by maximizing the stress on the slip plane the in-plane friction forces and the forge force are minimized; minimizing the in-plane forces enables the single crystal blade member to be successfully welded to the rim of the disc.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: June 8, 2010
    Assignee: Rolls-Royce plc
    Inventor: Simon E. Bray
  • Publication number: 20090321651
    Abstract: A device includes (a) radiation detector including a semiconductor substrate having opposing front and rear surfaces, a cathode electrode located on the front surface of said semiconductor substrate, and a plurality of anode electrodes on the rear surface of said semiconductor substrate, (b) a printed circuit board, and (c) an electrically conductive polymeric film disposed between circuit board and the anode electrodes. The polymeric film contains electrically conductive wires. The film bonds and electrically connects the printed circuit board and anode electrodes.
    Type: Application
    Filed: April 29, 2008
    Publication date: December 31, 2009
    Inventors: Pinghe LU, Henry Chen, Glenn Bindley
  • Publication number: 20090224027
    Abstract: A method for joining metal parts of a turbine engine component, the method comprising positioning a nanoparticle foil between faying surfaces of the metal parts, and diffusion bonding the metal with the nanoparticle foil, where the nanoparticle foil has a film thickness of about 100 micrometers or less, and comprises an alloy having an average particle size of about 500 nanometers or less.
    Type: Application
    Filed: April 10, 2008
    Publication date: September 10, 2009
    Applicant: Turbine Overhaul Services Pte Ltd
    Inventors: Glenn Hong Guan Lee, Wee Kwong Na
  • Patent number: 7565996
    Abstract: Systems and methods for transient liquid phase bonding are described herein. Embodiments of these systems and methods utilize sandwich interlayers to produce stronger, more homogeneous bonds than currently possible. These sandwich interlayers have a middle bonding layer sandwiched between two outer bonding layers. The middle bonding layer is a different composition, and may even be a different form, than the outer bonding layers. In embodiments, these sandwich interlayers may be used to join a single crystal material to a polycrystalline material to make a gas turbine engine component, such as an integrally bladed rotor.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: July 28, 2009
    Assignee: United Technologies Corp.
    Inventor: Gopal Das
  • Patent number: 7533795
    Abstract: A weld process cuitable for repairing precipitation-strengthened superalloys, and particularly gamma prime-strengthened nickel-based superalloys. The process entails forming a weldment in a cavity present in a surface of an article formed of a precipitation-strengthened superalloy. The cavity has a root region and a cap region between the root region and the surface of the article. A solid body formed of a superalloy composition is placed in the root region of the cavity so as to occupy a first portion but not a second portion of the root region. A first filler material formed of a solid solution-strengthened superalloy is then weld-deposited in the second portion of the root region. Subsequently, a second filler material formed of a precipitation-strengthened superalloy is weld-deposited in the cap region of the cavity.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: May 19, 2009
    Assignee: General Electric Company
    Inventors: Jon Conrad Schaeffer, Ariel Caesar-Prepena Jacala, Doyle C. Lewis, Thaddeus Jan Strusinski, Frederick Whitfield Dantzler, Jr., Eugene Franklin Clemens, Paul Stuart Wilson, Micahel Butler, Jeffrey Aaron Killough
  • Publication number: 20080286600
    Abstract: Fabrication techniques for and examples of metallic composite materials with high toughness, high strength, and lightweight for various structural, armor, and structural-armor applications. For example, various advanced materials based on metallic-intermetallic laminate (MIL) composite materials are described, including materials with passive damping features and built-in sensors.
    Type: Application
    Filed: June 15, 2005
    Publication date: November 20, 2008
    Inventors: Kenneth S. Vecchio, Aashish Rohatgi, John Kosmatka
  • Publication number: 20080173701
    Abstract: A chromium-free welding consumable and a method of welding stainless steel to reduce the presence of chromium emissions. The consumable is made from an alloy that reduces the emission of chromium during a welding process, and include predominantly nickel, with between approximately five and ten weight percent copper, up to approximately two percent by weight of ruthenium and up to five percent non-copper alloying ingredients. Welding consumables made from the alloy are particularly well-suited for welding austenitic stainless steels, such as type 304 stainless steel. The method involves using chromium-free weld filler material with a stainless steel base material.
    Type: Application
    Filed: February 11, 2008
    Publication date: July 24, 2008
    Applicant: THE OHIO STATE UNIVERSITY
    Inventors: Gerald S. Frankel, John C. Lippold
  • Publication number: 20080171174
    Abstract: An electrically conductive interconnect system has a post, extending above a supporting surface, the post including a rigid material, a coating on the rigid material, wherein the post and has a first width at the supporting surface and a second width at a distance removed from the supporting surface, and the post narrows from the first width to the second width. A method of electrically connecting a portion of a first supporting surface to a portion of a second supporting surface involves bringing a post on the first supporting surface into contact with an electrically conductive material located on the second supporting surface, softening the electrically conductive material, causing a separation distance between the first supporting surface and the second supporting distance to decrease so that a portion of the post will be surrounded by the electrically conductive material, and allowing the temperature of the electrically conductive material to decrease.
    Type: Application
    Filed: July 16, 2007
    Publication date: July 17, 2008
    Inventor: John Trezza
  • Patent number: 7278829
    Abstract: A repaired gas turbine blade includes a turbine blade body having a monocrystalline airfoil made of a first nickel-base superalloy, and a repair squealer tip welded to a tip of the airfoil. The repair squealer tip is made of a second nickel-base superalloy different from the first nickel-base superalloy and having less than about 0.15 weight percent total of carbon, boron, silicon, zirconium, and hafnium.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: October 9, 2007
    Assignee: General Electric Company
    Inventors: Lawrence Joseph Roedl, Rabon Hensley
  • Patent number: 6994920
    Abstract: A fusion welding method is provided for fusion welding at juxtaposed interface surfaces a first member, for example made of a first metal based on at least one of Ru, Rh, Pd, and Pt, with a second member made of a second metal, for example a high temperature alloy based on at least one of Fe, Co, and Ni, including at least one identified element, for example Al, that can form a continuous layer of a brittle intermetallic compound with the first metal that is free of such element. With the interface surfaces disposed in contact, energy is generated at the interface surfaces in a combination of an amount and for a first time selected to be sufficient to heat the interface surfaces to a fusion welding temperature. However, the first time is less than a second time that enables formation at the fusion welding temperature of the continuous layer of the brittle intermetallic compound at the interface surfaces.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: February 7, 2006
    Assignee: General Electric Company
    Inventor: Gary Edward Trewiler
  • Patent number: 6982123
    Abstract: A nickel-base superalloy article, such as a gas turbine stationary flowpath shroud that has previously been in service, is repaired by applying a restoration coating to a surface of the article. The restoration coating is applied by providing a precursor mixture, wherein the precursor mixture has no more than about 15 weight percent chromium and no more than about 0.01 percent yttrium, and wherein the precursor mixture includes a higher-melting-point alloy component and a lower-melting-point alloy component. The precursor mixture is applied to the surface of the article, in a form such as a preform of the alloy components. The article with the precursor mixture applied to the surface thereof is heated to a sufficiently high temperature to melt the lower-melting-point alloy component, thereby forming the restoration coating on the surface of the article.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: January 3, 2006
    Assignee: General Electric Company
    Inventors: David Edwin Budinger, Brent Ross Tholke, Matthew Nicklus Miller, Warren Davis Grossklaus, Jr., Joshua Leigh Miller, Melvin Robert Jackson
  • Patent number: 6968991
    Abstract: A diffusion bond mixture paint and method for repairing a single-crystal superalloy article that minimizes the amount of braze alloy applied to the article. The amount of boron and eutectic brittle borides of the wide gap brazing processes is minimized, resulting in a more robust repair. The braze paint includes an alloy powder mixture, a binder, and a carrier to thin the paint.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: November 29, 2005
    Assignee: Honeywell International, Inc.
    Inventors: Federico Renteria, William F Hehmann
  • Patent number: 6945448
    Abstract: A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components or acetabular cups. The method, in one embodiment thereof, comprises providing a structured porous layer; providing a dense metal substrate; providing a binding mixture; applying the binding mixture to the exterior of the substrate; placing the porous layer against the substrate such that the binding mixture is disposed there between forming an assembly; and heat treating the assembly to metallurgically bond the porous layer to the substrate.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: September 20, 2005
    Assignee: Zimmer Technology, Inc.
    Inventors: Dana J. Medlin, Steven J. Charlebois, William Clarke, Dirk L. Pletcher, Joel G. Scrafton, H. Ravindranath Shetty, Dale Swarts
  • Patent number: 6866730
    Abstract: A material and method for adhering at least two materials that includes the step of interposing at least one intermediate layer between the two materials and associated adhesion material. The materials to be adhered exhibit at least one characteristic dissimilarity and the intermediate material interposed contains at least one shape memory alloy, the shape memory alloy capable of exhibiting -superelasticity.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: March 15, 2005
    Assignees: General Motors Corporation, Michigan State University
    Inventors: Yang-Tse Cheng, Wangyang Ni, Leonid Charles Lev, Michael J. Lukitsch, David S. Grummon, Anita M. Weiner
  • Patent number: 6720086
    Abstract: A liquid interface diffusion bonded composition comprises a metal honeycomb core such as a nickel-alloy honeycomb core and a nickel-alloy facing sheet bonded thereto. The composition and method of this invention are useful in applications where high strength, heat resistant materials are required, such as in aircraft and aerospace-related structures.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: April 13, 2004
    Assignee: Rohr, Inc.
    Inventor: Andrew J. Strutt
  • Patent number: 6682780
    Abstract: A method for protecting low-carbon steel and stainless steel from coking and corrosion at elevated temperatures in corrosive environments, such as during ethylene production by pyrolysis of hydrocarbons or the reduction of oxide ores, by coating the stainless steel with a coating of MCrAlXSiT in which M is nickel, cobalt, iron or a mixture thereof, X is yttrium, hafnium, zirconium, lanthanum, scandium or combination thereof, and T is tantalum, titanium, platinum, palladium, rhenium, molybdenum, tungsten, niobium, boron or combination thereof. A blended powder composition to produce a desired MCrAlXSiT surface alloy may be applied to the substrate. The overlay coating and stainless steel substrate preferably are heat-treated at about 1000 to 1200° C. for about 10 minutes or longer effective to metallurgically bond the overlay coating to the substrate and to form a multiphased microstructure.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: January 27, 2004
    Assignee: Bodycote Metallurgical Coatings Limited
    Inventors: Konstantin K. Tzatzov, Alexander S. Gorodetsky, Andrew Wysiekierski, Gary Anthony Fisher
  • Patent number: 6602777
    Abstract: The present invention relates to a method for controlling the formation of the intermetallic compounds in solder joints, The types of the intermetallic compounds between the SnAgCu solders and the Ni-bearing substrate can be controlled by adjusting the copper concentration in the SnAgCu solders. If the SnAgCu solder has a copper concentration higher than or equivalent to 0.6 wt. %, the soldering intermetallic compound includes a continuous (Cu1−xNix)6Sn5 layer. If the copper concentration of the SnAgCu solders is lower than or equivalent to 0.4 wt. %, the soldering intermetallic compound includes a continuous (Ni1−yCuy)3Sn4 layer and a non-continuous (Cu1−xNix)6Sn5 layer. If the copper concentration of the SnAgCu solders is between 0.4 wt. % to 0.6 wt. %, the soldering intermetallic compound includes the continuous (Cu1−xNix)6Sn5.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: August 5, 2003
    Assignee: National Central University
    Inventors: Cheng-Heng Kao, Cheng-En Ho
  • Publication number: 20030102061
    Abstract: A process for welding superalloys, and particularly articles formed of gamma prime-strengthened nickel-base superalloys whose chemistries and/or microstructures differ. The process entails forming the faying surface of at least one of the articles to have a cladding layer of a filler material. The filler material may have a composition that is different from both of the articles, or the same as one of the articles. The cladding layer is machined to promote mating of the faying surfaces, after which the faying surfaces are mated and the articles welded together. After cooling, the welded assembly is free of thermally-induced cracks.
    Type: Application
    Filed: December 4, 2001
    Publication date: June 5, 2003
    Inventors: Lyle B. Spiegel, Raymond Alan White, John Thomas Murphy, Daniel Anthony Nowak
  • Patent number: 6544668
    Abstract: Nickel aluminum alloys are welded utilizing a nickel based alloy containing zirconium but substantially free of titanium and niobium which reduces the tendency to crack.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: April 8, 2003
    Assignee: U. T. Battelle, LLC
    Inventors: Michael L. Santella, Jeffrey D. McNabb, Vinod K. Sikka
  • Patent number: 6541075
    Abstract: An article includes a substrate and an adhesion layer overlying the substrate. The adhesion layer includes a first phase including particles, and a second phase including braze alloy that bonds the particles to the substrate. The article further includes a ceramic layer overlying the adhesion layer. In one embodiment, the ceramic layer is a thermal barrier coating (TBC), formed of stabilized zirconia (ZrO2).
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: April 1, 2003
    Assignee: General Electric Company
    Inventors: Wayne Charles Hasz, Jeffrey Allen Conner
  • Patent number: 6489584
    Abstract: A near-surface defect in a nickel-base superalloy article having a nil-ductility range is weld repaired with a low-power, directional, spatially confined heat source. During the weld repair procedure, the body of the article is maintained at room temperature. Simultaneously, the surface of the article is locally melted in the region of the near-surface defect using the heat source to form a melted region, and thereafter the melted region is allowed to solidify. The heat source produces a shallow weld pool that allows the near-surface defect to be floated to the surface in the case of an inclusion, or welded closed in the case of a surface crack or near-surface void.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: December 3, 2002
    Assignee: General Electric Company
    Inventor: Thomas Joseph Kelly
  • Patent number: 6410165
    Abstract: A welding method that enables the joining of at least two dissimilar, metallic alloys to form a weld that is free of cracks is disclosed. The method incorporates a pure (99.00% minimum by weight) nickel fill-wire, integrally assembled into the joint between the two alloyed metals to be joined. The alloys joined by this method are an iron-based, low expansivity, gamma-prime strengthened superalloy (i.e., Incoloy®) and a high carbon, powder metallurgical tool steel high in refractory metal alloying agents (i.e., CPM REX 20). Welding of the joint results in the formation of a nickel rich region within the weld, thus “inoculating” the weld against cracks. The weld joint formed by the method of the present invention can be used in the fabrication of a rotating anode bearing shaft assembly for use in an x-ray generating device.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: June 25, 2002
    Assignee: General Electric Company
    Inventors: John Warren, Paul Neitzke, Craig Higgins
  • Publication number: 20020074385
    Abstract: A first substrate, a second substrate, an intermediate and a plurality of particles form a laminated structure. The first substrate has a first conjunction portion and a second conjunction portion, and the second substrate has a third conjunction portion and a fourth conjunction portion which are characterized by a first hardness. The intermediate is disposed between the first substrate and the second substrate. The particles provided with a second hardness greater than the first hardness are coated on the third conjunction portion to contact the first conjunction portion and coated on the fourth conjunction portion to contact the second conjunction portion. A height difference with reference to the base surface of the second substrate exists between the end surface of the third conjunction portion and the end surface of the fourth conjunction portion.
    Type: Application
    Filed: January 24, 2002
    Publication date: June 20, 2002
    Applicant: Unipac Optoelectronics Corporation
    Inventors: Ling-Yi Chuang, Li-Chang Lu
  • Patent number: 6333484
    Abstract: A process is provided for welding a nickel or cobalt based superalloy article to minimize cracking by preheating the entire weld area to a maximum ductility temperature range, maintaining such temperature during welding and solidification of the weld, raising the temperature for stress relief of the superalloy, then cooling at a rate effective to minimize gamma prime precipitation.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: December 25, 2001
    Assignee: Chromalloy Gas Turbine Corporation
    Inventors: Michael Foster, Kevin Updegrove
  • Patent number: 6213383
    Abstract: A Ni—Ti alloy part (6) constituting a frame for a pair of spectacles is inserted in and then caulked to a bore (3) formed in a joint piece (2) that is made of a resistance-weldable or resistance-brazeable titanium material. The joint piece (2) has a weldable or brazeable portion (5) that is located remote from the bore (3). This piece (2) will subsequently be resistance welded or brazed to a skeleton member (7) also constituting the frame and made of the same or a different titanium material also weldable or brazeable, so that the Ni—Ti alloy part can firmly and reliably be secured to the skeleton member.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: April 10, 2001
    Assignee: Nakanishi Optical Corporation
    Inventor: Eiichi Nakanishi
  • Patent number: 6209777
    Abstract: A fusion welding method for binding the surfaces of two metals including the steps of (a) coating a layer of a powdery media capable of forming eutectics with both the two metals for lowering the melting points of the two metals, onto at least one of the binding surfaces of the two metal to be bound; and (b) sintering, in a vacuum furnace, the two metals with said powdery media being coated on their binding surfaces as produced in step (a) until the two metals are fused together by eutectic welding, and the sintering temperature being controlled at a temperature higher than the eutectic points of the two metals and the powdery medium, but lower than the melting points of the two metals.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 3, 2001
    Assignee: New Century Technology Co., Ltd.
    Inventors: Chao-nien Tung, Tien-tzu Chuang
  • Patent number: 6206269
    Abstract: The present invention relates to a method of soldering a semiconductor chip to a substrate, such as to a capsule in an RF-power transistor, for instance. The semiconductor chip is provided with an adhesion layer consisting of a first material composition. A solderable layer consisting of a second material composition is disposed on this adhesion layer. An antioxidation layer consisting of a third material composition is disposed on said solderable layer. The antioxidation layer is coated with a layer of gold-tin solder. The chip is placed on a solderable capsule surface, via said gold-tin solder. The capsule and chip are exposed to an inert environment to which a reducing gas is delivered and the capsule and chip are subjected to a pressure substantially beneath atmospheric pressure whilst the gold-tin solder is heated to a temperature above its melting point.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: March 27, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Lars-Anders Olofsson
  • Patent number: 6193141
    Abstract: A method of bonding together at least two long, metal alloy segments, of turbine components, such as turbine blade segments (18, 19, 20 and 21) by: putting a melting point depressant between the segments at bond planes (34) between contracting segments; forming a heated zone across the segments and a heated front (32); where melt pools (36) form in a molten zone (38) at the heated front which front (32), pools (36) and zone (38) continuously move and pass along the bond planes (34); where crystal re-growth (35) occurs along the bonding planes to form bonds (34) between the individual segments (18, 19, 20 and 21) behind the moving molten zone (38).
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: February 27, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Michael A. Burke, Paul J. Zombo