Martin Anita Rupich

6436317, Aug 20, 2002

May 26, 2000

09/579193

Alexis P. Malozemoff - Lexington MA
Alexander Otto - Chelmsford MA
Cornelis Leo Hans Thieme - Westborough MA
Martin W. Rupich - Framingham MA

American Superconductor Corporation - Westborough MA

H01B 102

2525191, 505230, 505231, 505238, 505701, 505704, 2525205, 1741251

Oxide bronze compositions and articles manufactured in accordance therewith are provided. The oxide bronze compositions have the general formula A BO , in which A comprises an alkali, alkaline earth or rare earth metal and in which A has a valence, m, equal to 1, 2 or 3, B comprises a transition metal having a valence, n, less than or equal to 6,0x1 on an atomic ratio basis and y=[(x)(m)+n]/2. High temperature superconducting devices incorporating such compositions are also provided. The superconducting devices include a substrate having a polycrystalline superconducting layer or filament deposited on top of or embedded in the substrate. The superconducting layer or filament is formed of the oxide bronze composition. In some embodiments, the oxide bronze layer is textured with a full-width-half-maximum of a pole figure of less than or equal to 20 degrees.

6537689, Mar 25, 2003

Nov 26, 2001

09/995420

Suresh Annavarapu - Brookline MA
Martin W. Rupich - Framingham MA
Xiaoping Li - Westborough MA
Wei Zhang - Shrewsbury MA
Edward J. Siegal - Malden MA
Qi Li - Marlborough MA

American Superconductor Corporation - Westborough MA

C09K 1900

428701, 428930, 505237, 505238

The invention relates to multi-layer articles and methods of making such articles. The multi-layer superconductors can have one or more layers with an oriented termination plane. The methods include first conditioning the termination plane of an underlying layer, such as a buffer layer or a superconductor layer, then disposing a layer of material on the conditioned termination plane. The conditioned termination plane can be a high quality termination plane. Superconductor articles formed by these methods can exhibit relatively high critical current densities.

6613270, Sep 2, 2003

May 30, 2000

09/583304

Qi Li - Marlborough MA
Lawrence J. Masur - Needham MA
Eric R. Podtburg - Natick MA
Ronald D. Parella - Holden MA
Martin W. Rupich - Framingham MA
Donald R. Parker - Randolph MA
William L. Carter - Chelmsford MA
William J. Rosati - Milford MA
Mark D. Teplitsky - Westborough MA

American Superconductor Corporation - Westborough MA

H01L 3900

264604, 264614, 264619, 505431, 505432, 29599

A novel process of the production and processing of high quality, high T BSCCO or (Bi,Pb)SCCO superconductors starts with fabrication of a forming a bundle including a plurality of billets, each billet containing at least one filament comprising a dominant amount of an tetragonal BSCCO phase with selected intermediate phases, and substantially surrounded by a constraining metal. The bundle is thermomechanically consolidated to form a multifilamentary precursor article by applying pressure and heat to the bundle under conditions cooperatively selected to cause interdiffusion of said constraining metal at the interfaces between said metal and said filaments and substantially complete elimination of voids in said bundle, and the consolidation step is completed before any high strain longitudinal deformation is performed on the bundle. The precursor article is then heated at a second selected processing temperature in an inert atmosphere with a second selected oxygen partial pressure for a second selected time period, the second processing temperature, the second time period and the second oxygen partial pressure being cooperatively selected to form a dominant amount of an orthorhombic BSCCO phase in the reacted mixture. It may then be deformed to form an elongated precursor article of a desired texture; and thereafter heated at a third selected processing temperature in an inert atmosphere with a third selected oxygen partial pressure for a third selected time period, all cooperatively selected to convert at least a portion of the orthorhombic BSCCO phase to the final superconducting BSCCO material.

6620768, Sep 16, 2003

Sep 21, 2001

09/960189

Martin W. Rupich - Framingham MA
William L. Carter - Chelmsford MA
Qi Li - Westborough MA
Alexander Otto - Chelmsford MA
Gilbert Riley, Jr. - Marlborough MA

American Superconductor Corporation - Westborough MA

H01B 1200

505121, 505785

A novel process of the production and processing of high quality, high T (Bi,Pb)SCCO superconductors starts with fabrication of a precursor article including selected intermediate phases with desired chemical and structural properties. The precursor fabrication includes mixing raw powders with a desired ratio of Bi:Pb:Sr:Ca:Cu elements and reacting the mixture under different selected reaction conditions that form a precursor powder with a dominant (Bi, Pb)SCCO 2212 phase and without CaâPbâO phase, wherein the 2212 phase may be the orthorhombic 2212 phase. The precursor article is then subjected to optimized reaction and mechanical deformation processes that lead to a reaction induced texturing and deformation induced texturing, respectively. A heating process is used to convert the precursor powder to the 2223 phase and subsequent deformation and annealing processes may be used to form a substantially single phase, highly textured (Bi, Pb)SCCO 2223 superconductor with high Jc.

6669774, Dec 30, 2003

Jul 14, 2000

09/615991

Wei Zhang - Shrewsbury MA
Edward J. Siegal - Malden MA
Martin W. Rupich - Framingham MA
Qi Li - Marlborough MA

American Superconductor Corporation - Westborough MA

C30B 500

117 4, 505446

The invention relates to methods and compositions for making a multi-layer article. The compositions can be used in relatively fast methods which can superconductor material intermediates that have relatively few cracks and/or blisters. The compositions can have relatively low water contents.

6673387, Jan 6, 2004

Jul 14, 2000

09/616566

Wei Zhang - Shrewsbury MA
Qi Li - Marlborough MA
Martin W. Rupich - Framingham MA

American Superconductor Corporation - Westborough MA

B05D 512

427 62, 4271263, 4273722, 427377, 427380, 505123, 505310, 505470, 505742

A process is described for formation of oxide films independent of thickness from precursor films comprising metals, metal oxides, and metal fluorides with properties and structures similar to those previously only obtained in thin films, for example less than about 0. 4 microns.

6694600, Feb 24, 2004

Nov 21, 2001

09/990953

Qi Li - Marlborough MA
Eric R. Podtburg - Natick MA
Patrick John Walsh - Newton MA
William L. Carter - Chelmsford MA
Martin W. Rupich - Framingham MA
Elliott Thompson - Coventry RI
Alexander Otto - Chelmsford MA

American Superconductor Corporation - Westborough MA

H01L 3924

29599, 505739, 505742, 505501

A method is described to prepare a highly textured oxide superconductor article in a single deformation-sinter process. A precursor article including a plurality of filaments comprising a precursor oxide having a dominant amount of a tetragonal BSCCO 2212 phase and a constraining member substantially surrounding each of the filaments is provided. Each of the filaments extends along the length of the article. The oxide article is subjected to a heat treatment at an oxygen partial pressure and temperature selected to convert a tetragonal BSCCO 2212 oxide into an orthorhombic BSCCO 2212 oxide and, thereafter, roll worked in a high reduction draft in a range of about 40% to 95% in thickness so that the filaments have a constraining dimension is substantially equivalent to a longest dimension of the oxide superconductor grains. The rolled article is sintered to obtain a BSCCO 2223 oxide superconductor.

6730410, May 4, 2004

Jul 14, 2000

09/616570

Leslie G. Fritzemeier - Mendon MA
Qi Li - Marlborough MA
Martin W. Rupich - Framingham MA
Elliott D. Thompson - Coventry RI
Edward J. Siegal - Malden MA
Cornelis Leo Hans Thieme - Westborough MA
Suresh Annavarapu - Brookline MA
Paul N. Arendt - Los Alamos NM
Stephen R. Foltyn - Los Alamos NM

Electronic Power Research Institute, Incorporated - Palo Alto CA
The Regents of the University of California - Oakland CA

B23B 1500

428469, 428697, 428699, 428701, 428702, 428930, 505236, 505237, 505238, 505239

Methods and articles for controlling the surface of an alloy substrate for deposition of an epitaxial layer. The invention includes the use of an intermediate layer to stabilize the substrate surface against oxidation for subsequent deposition of an epitaxial layer.