Patents by Inventor Amit Goyal

Amit Goyal 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).

  • Publication number: 20020005084
    Abstract: A strengthened, biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed, compacted and sintered powder-metallurgy preform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of: Ni, Ag, Ag—Cu, Ag—Pd, Ni—Cu, Ni—V, Ni—Mo, Ni—Al, Ni—Cr—Al, Ni—W—Al, Ni—V—Al, Ni—Mo—Al, Ni—Cu—Al; and at least one fine metal oxide powder; the article having a grain size which is fine and homogeneous; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.
    Type: Application
    Filed: August 16, 2001
    Publication date: January 17, 2002
    Inventors: Amit Goyal, Robert K. Williams, Donald M. Kroeger
  • Publication number: 20020004144
    Abstract: A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy preform article, the prefonn article having been formed from a powder mixture selected from the group of ternary mixtures consisting of: Ni powder, Cu powder, and Al powder, Ni powder, Cr powder, and Al powder; Ni powder, W powder and Al powder; Ni powder, V powder, and Al powder; Ni powder, Mo powder, and Al powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.
    Type: Application
    Filed: August 16, 2001
    Publication date: January 10, 2002
    Inventors: Amit Goyal, Robert K. Williams, Donald M. Kroeger
  • Publication number: 20020001711
    Abstract: A biaxially textured alloy article having a magnetism less than pure Ni includes a rolled and annealed compacted and sintered powder-metallurgy perform article, the preform article having been formed from a powder mixture selected from the group of mixtures consisting of at least 60 at % Ni powder and at least one of Cr powder, W powder, V powder, Mo powder, Cu powder, Al powder, Ce powder, YSZ powder, Y powder, Mg powder, and RE powder; the article having a fine and homogeneous grain structure; and having a dominant cube oriented {100}<100> orientation texture; and further having a Curie temperature less than that of pure Ni.
    Type: Application
    Filed: August 16, 2001
    Publication date: January 3, 2002
    Inventors: Amit Goyal, Robert K. Williams, Donald M. Kroeger
  • Patent number: 6331199
    Abstract: A biaxially textured alloy article comprises Ni powder and at least one powder selected from the group consisting of Cr, W, V, Mo, Cu, Al, Ce, YSZ, Y, Rare Earths, (RE), MgO, CeO2, and Y2O3; compacted and heat treated, then rapidly recrystallized to produce a biaxial texture on the article. In some embodiments the alloy article further comprises electromagnetic or electro-optical devices and possesses superconducting properties.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: December 18, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Amit Goyal, Robert K. Williams
  • Patent number: 6270908
    Abstract: A laminate article comprises a substrate and a biaxially textured (RExA(1−x))2O2−(x/2) buffer layer over the substrate, wherein 0<x≦0.70 and RE is selected from the group consisting of La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. A is selected from the group consisting of Zr+4, Ce+4, Sn+4, and Hf+4. The (RExA(1−x))2O2−(x/2) buffer layer can be deposited using sol-gel or metal-organic decomposition. The laminate article can include a layer of YBCO over the (RExA(1−x))2O2−(x/2) buffer layer. A layer of CeO2 between the YBCO layer and the (RExA(1−x))2O2−(x/2) buffer layer can also be include. Further included can be a layer of YSZ between the CeO2 layer and the (RExA(1−x))2O2−(x/2) buffer layer. The substrate can be a biaxially textured metal, such as nickel. A method of forming the laminate article is also disclosed.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: August 7, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Robert K. Williams, Mariappan Paranthaman, Thomas G. Chirayil, Dominic F. Lee, Amit Goyal, Roeland Feenstra
  • Patent number: 6261704
    Abstract: Buffer layer architectures are epitaxially deposited on biaxially-textured rolled-Ni and/or Cu substrates for high current conductors, and more particularly buffer layer architectures such as MgO/Ag/Pt/Ni, MgO/Ag/Pd/Ni, MgO/Ag/Ni, MgO/Ag/Pd/Cu, MgO/Ag/Pt/Cu, and MgO/Ag/Cu. Techniques used to deposit these buffer layers include electron beam evaporation, thermal evaporation, rf magnetron sputtering, pulsed laser deposition, metal-organic chemical vapor deposition (MOCVD), combustion CVD, and spray pyrolysis.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: July 17, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Mariappan Paranthaman, Amit Goyal, Donald M. Kroeger, Frederic A. List, III
  • Patent number: 6256521
    Abstract: A multi-domained bulk REBa2Cu3Ox with low-angle domain boundaries which resembles a quasi-single domained material and a method for producing the same comprising arranging multiple seeds, which can be small single crystals, single domained melt-textured REBa2Cu3Ox pieces, textured substrates comprised of grains with low misorientation angles, or thick film REBa2Cu3Ox deposited on such textured substrate, such seeds being tailored for various REBa2Cu3Ox compounds, in specific pattern and relative seed orientations on a superconductor precursor material which may be placed in contact with a porous substrate so as to reduce the amount of liquid phase in the melt. Because seeds can be arranged in virtually any pattern, high quality REBa2Cu3Ox elements of virtually unlimited size and complex geometry can be fabricated.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: July 3, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Dominic F. Lee, Donald M. Kroeger, Amit Goyal
  • Patent number: 6235402
    Abstract: A method is disclosed for forming a biaxially textured buffer layer on a biaxially oriented metal substrate by using a sol-gel coating technique followed by pyrolyzing/annealing in a reducing atmosphere. This method is advantageous for providing substrates for depositing electronically active materials thereon.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: May 22, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Shara S. Shoup, Mariappan Paranthamam, David B. Beach, Donald M. Kroeger, Amit Goyal
  • Patent number: 6180570
    Abstract: A method of preparing a biaxially textured article comprises the steps of providing a metal preform, coating or laminating the preform with a metal layer, deforming the layer to a sufficient degree, and rapidly recrystallizing the layer to produce a biaxial texture. A superconducting epitaxial layer may then be deposited on the biaxial texture. In some embodiments the article further comprises buffer layers, electromagnetic devices or electro-optical devices.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: January 30, 2001
    Assignee: UT-Battelle, LLC
    Inventor: Amit Goyal
  • Patent number: 6159610
    Abstract: Buffer layer architectures are epitaxially deposited on biaxially-textured rolled substrates of nickel and/or copper and their alloys for high current conductors, and more particularly buffer layer architectures such as Y.sub.2 O.sub.3 /Ni, YSZ/Y.sub.2 O.sub.3 /Ni, RE.sub.2 O.sub.3 /Ni, (RE=Rare Earth), RE.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Ni, RE.sub.2 O.sub.3 /CeO.sub.2 /Ni, and RE.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Ni, Y.sub.2 O.sub.3 /Cu, YSZ/Y.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /CeO.sub.2 /Cu, and RE.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Cu. Deposition methods include physical vapor deposition techniques which include electron-beam evaporation, rf magnetron sputtering, pulsed laser deposition, thermal evaporation, and solution precursor approaches, which include chemical vapor deposition, combustion CVD, metal-organic decomposition, sol-gel processing, and plasma spray.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: December 12, 2000
    Assignee: UT-Battelle, LLC
    Inventors: Mariappan Paranthaman, Dominic F. Lee, Donald M. Kroeger, Amit Goyal
  • Patent number: 6156376
    Abstract: Buffer layer architectures are epitaxially deposited on biaxially-textured rolled substrates of nickel and/or copper and their alloys for high current conductors, and more particularly buffer layer architectures such as Y.sub.2 O.sub.3 /Ni, YSZ/Y.sub.2 O.sub.3 /Ni, RE.sub.2 O.sub.3 /Ni, (RE=Rare Earth), RE.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Ni, RE.sub.2 O.sub.3 /CeO.sub.2 /Ni, and RE.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Ni, Y.sub.2 O.sub.3 /Cu, YSZ/Y.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Cu, RE.sub.2 O.sub.3 /CeO.sub.2 /Cu, and RE.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Cu. Deposition methods include physical vapor deposition techniques which include electron-beam evaporation, rf magnetron sputtering, pulsed laser deposition, thermal evaporation, and solution precursor approaches, which include chemical vapor deposition, combustion CVD, metal-organic decomposition, sol-gel processing, and plasma spray.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: December 5, 2000
    Assignee: UT-Battelle, LLC
    Inventors: Mariappan Paranthaman, Dominic F. Lee, Donald M. Kroeger, Amit Goyal
  • Patent number: 6150034
    Abstract: Buffer layer architectures are epitaxially deposited on biaxially-textured rolled substrates of nickel and/or copper and their alloys for high current conductors, and more particularly buffer layer architectures such as Y.sub.2 O.sub.3 /Ni, YSZ/Y.sub.2 O.sub.3 /Ni, Yb.sub.2 O.sub.3 /Ni, Yb.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Ni, Yb.sub.2 O.sub.3 /CeO.sub.2 /Ni, RE.sub.2 O.sub.3 /Ni (RE=Rare Earth), and Yb.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Ni, Y.sub.2 O.sub.3 /Cu, YSZ/Y.sub.2 O.sub.3 /Cu, Yb.sub.2 O.sub.3 /Cu, Yb.sub.2 O.sub.3 /Y.sub.2 O.sub.3 /Cu, Yb.sub.2 O.sub.3 /CeO.sub.2 /Cu, RE.sub.2 O.sub.3 /Cu, and Yb.sub.2 O.sub.3 /YSZ/CeO.sub.2 /Cu. Deposition methods include physical vapor deposition techniques which include electron-beam evaporation, rf magnetron sputtering, pulsed laser deposition, thermal evaporation, and solution precursor approach, which includes chemical vapor deposition, combustion CVD, metal-organic decomposition, sol-gel processing, and plasma spray.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: November 21, 2000
    Assignee: UT-Battelle, LLC
    Inventors: Mariappan Paranthaman, Dominic F. Lee, Donald M. Kroeger, Amit Goyal
  • Patent number: 6114287
    Abstract: The present invention provides methods and biaxially textured articles having a deformed epitaxial layer formed therefrom for use with high temperature superconductors, photovoltaic, ferroelectric, or optical devices. A buffer layer is epitaxially deposited onto biaxially-textured substrates and then mechanically deformed. The deformation process minimizes or eliminates grooves, or other irregularities, formed on the buffer layer while maintaining the biaxial texture of the buffer layer. Advantageously, the biaxial texture of the buffer layer is not altered during subsequent heat treatments of the deformed buffer. The present invention provides mechanical densification procedures which can be incorporated into the processing of superconducting films through the powder deposit or precursor approaches without incurring unfavorable high-angle grain boundaries.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: September 5, 2000
    Assignee: UT-Battelle, LLC
    Inventors: Dominic F. Lee, Donald M. Kroeger, Amit Goyal
  • Patent number: 6106615
    Abstract: Specific alloys, in particular Ni-based alloys, that can be biaxially textured, with a well-developed, single component texture are disclosed. These alloys have a significantly reduced Curie point, which is very desirable from the point of view of superconductivity applications. The biaxially textured alloy substrates also possess greatly enhanced mechanical properties (yield strength, ultimate tensile strength) which are essential for most applications, in particular, superconductors. A method is disclosed for producing complex multicomponent alloys which have the ideal physical properties for specific applications, such as lattice parameter, degree of magnetism and mechanical strength, and which cannot be in textured form. In addition, a method for making ultra thin biaxially textured substrates with complex compositions is disclosed.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: August 22, 2000
    Inventors: Amit Goyal, Eliot D. Specht, Donald M. Kroeger, Mariappan Paranthaman
  • Patent number: 6077344
    Abstract: A method is disclosed for forming a biaxially textured buffer layer on a biaxially oriented metal substrate by using a sol-gel coating technique followed by pyrolyzing/annealing in a reducing atmosphere. This method is advantageous for providing substrates for depositing electronically active materials thereon.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: June 20, 2000
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Shara S. Shoup, Mariappan Paranthamam, David B. Beach, Donald M. Kroeger, Amit Goyal
  • Patent number: 5968877
    Abstract: A superconducting article includes a biaxially-textured Ni substrate, and epitaxial buffer layers of Pd (optional), CeO.sub.2 and YSZ, and a top layer of in-plane aligned, c-axis oriented YBCO having a critical current density (J.sub.c) in the range of at least 100,000 A/cm.sup.2 at 77 K.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: October 19, 1999
    Assignee: Lockheed Martin Energy Research Corp
    Inventors: John D. Budai, David K. Christen, Amit Goyal, Qing He, Donald M. Kroeger, Dominic F. Lee, Frederick A. List, III, David P. Norton, Mariappan Paranthaman, Brian C. Sales, Eliot D. Specht
  • Patent number: 5964966
    Abstract: Specific alloys, in particular Ni-based alloys, that can be biaxially textured, with a well-developed, single component texture are disclosed. These alloys have a significantly reduced Curie point, which is very desirable from the point of view of superconductivity applications. The biaxially textured alloy substrates also possess greatly enhanced mechanical properties (yield strength, ultimate tensile strength) which are essential for most applications, in particular, superconductors. A method is disclosed for producing complex multicomponent alloys which have the ideal physical properties for specific applications, such as lattice parameter, degree of magnetism and mechanical strength, and which cannot be fabricated in textured form. In addition, a method for making ultra thin biaxially textured substrates with complex compositions is disclosed.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: October 12, 1999
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Amit Goyal, Eliot D. Specht, Donald M. Kroeger, Mariappan Paranthaman
  • Patent number: 5958599
    Abstract: A biaxially textured alloy article includes a rolled and annealed biaxially textured base metal substrate characterized by an x-ray diffraction phi scan peak of no more than 20.degree. FWHM; and a biaxially textured layer of an alloy or another material on a surface thereof. The article further includes at least one of an electromagnetic device or an electro-optical device epitaxially joined to the alloy.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: September 28, 1999
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Amit Goyal, John D. Budai, Donald M. Kroeger, David P. Norton, Eliot D. Specht, David K. Christen
  • Patent number: 5898020
    Abstract: A biaxially textured article includes a rolled and annealed, biaxially textured substrate of a metal having a face-centered cubic, body-centered cubic, or hexagonal close-packed crystalline structure; and an epitaxial superconductor or other device epitaxially deposited thereon.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: April 27, 1999
    Inventors: Amit Goyal, John D. Budai, Donald M. Kroeger, David P. Norton, Eliot D. Specht, David K. Christen
  • Patent number: 5846912
    Abstract: The present invention relate to textured YBa.sub.2 Cu.sub.3 O.sub.x (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at temperatures about 100.degree. C. below the peritectic temperature to provide a superconductor where more than 75% of the YBa.sub.2 Cu.sub.3 O.sub.x phase is obtained without any Y.sub.2 BaCuO.sub.5 .
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: December 8, 1998
    Assignee: Lockheed Martin Energy Systems, Inc.
    Inventors: Venkat Selvamanickam, Amit Goyal, Donald M. Kroeger