University of Chicago

Uchicago Argonne, LLC

Dean J Miller

Uthamalingam Balachandran

Beihai Ma

Kenneth C Goretta

Suvankar Sengupta

Donglu Shi

Martin W Rupich

Michael T Lanagan

Alexis P Malozemoff

John C Parker

Michael Field

Ulrich Welp

Wai-Kwong Kwok

Steven Fleshler

Richard W Siegel

Volker R Todt

Jieguang Hu

Thomas G Truchan

Robert Foley

A method comprising irradiating a polycrystalline rare earth metal-alkaline earth metal-transition metal-oxide superconductor layer with protons having an energy of 1 to 6 MeV. The irradiating process produces an irradiated layer that comprises randomly dispersed defects with an average diameter in the range of 1-10 nm.

Creation of high-pinning microstructures in post production YBCO coated conductors

A layered article of manufacture and a method of manufacturing same is disclosed. A substrate has a biaxially textured MgO crystalline layer having the c-axes thereof inclined with respect to the plane of the substrate deposited thereon. A layer of one or more of YSZ or YOand then a layer of CeOis deposited on the MgO. A crystalline superconductor layer with the c-axes thereof normal to the plane of the substrate is deposited on the CeOlayer. Deposition of the MgO layer on the substrate is by the inclined substrate deposition method developed at Argonne National Laboratory. Preferably, the MgO has the c-axes thereof inclined with respect to the normal to the substrate in the range of from about 10&#xb0; to about 40&#xb0; and YBCO superconductors are used.

Method for fabrication of high temperature superconductors

A biaxially textured face-centered cubic metal article having grain boundaries with misorientation angles greater than about 8&deg; limited to less than about 1%. A laminate article is also disclosed having a metal substrate first rolled to at least about 95% thickness reduction followed by a first annealing at a temperature less than about 375&deg; C. Then a second rolling operation of not greater than about 6% thickness reduction is provided, followed by a second annealing at a temperature greater than about 400&deg; C. A method of forming the metal and laminate articles is also disclosed.

Metallic substrates for high temperature superconductors

A bulk superconductor having a thickness of not less than about 100 microns is carried by a polycrystalline textured substrate having misorientation angles at the surface thereof not greater than about 15&deg;; the bulk superconductor may have a thickness of not less than about 100 microns and a surface area of not less than about 50 cm . The textured substrate may have a thickness not less than about 10 microns and misorientation angles at the surface thereof not greater than about 15&deg;. Also disclosed is a process of manufacturing the bulk superconductor and the polycrystalline biaxially textured substrate material.

Large area bulk superconductors

A method of preparing a high temperature superconductor. A method of preparing a superconductor includes providing a powdered high temperature superconductor and a nanophase material. These components are combined to form a solid compacted mass with the material disposed in the polycrystalline high temperature superconductor. This combined mixture is rapidly heated, forming a dispersion of nanophase size particles without a eutectic reaction. These nanophase particles can have a flat plate or columnar type morphology.

Engineered flux-pinning centers in BSCCO TBCCO and YBCO superconductors

A method of fabricating bulk YBa.sub.2 Cu.sub.3 O.sub.x where compressed powder oxides and/or carbonates of Y and Ba and Cu present in mole ratios to form YBa.sub.2 Cu.sub.3 O.sub.x are heated in the presence of a Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.y seed crystal to a temperature sufficient to form a liquid phase in the YBa.sub.2 Cu.sub.3 O.sub.x while maintaining the seed crystal solid. The materials are slowly cooled to provide a YBa.sub.2 Cu.sub.3 O.sub.x material having a predetermined number of domains between 1 and 5. Crack-free single domain materials can be formed using either plate shaped seed crystals or cube shaped seed crystals with a pedestal of preferential orientation material.

Large single domain 123 material produced by seeding with single crystal

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Darien, IL, United States of America

Dean J Miller