Ut-battelle, Inc.

Other

Martin Marietta Energy Systems, Inc.

Lockheed Martin Energy Research Corporation

Lockheed Martin Energy Systems, Inc.

The United States of America As Represented by the United States

Applied Thin Films, Inc.

Donald M Kroeger

Amit Goyal

Robert K Williams

Mariappan Parans Paranthaman

Dominic F Lee

Eliot D Specht

David P Norton

David K Christen

John D Budai

Frederick Alyious List, Iii

Scott A Barnett

David B Beach

Shara S Shoup

Ilwon Kim

Frederic A List, Iii

Mariappan Paranthamam

Sambasivan Sankar

Qing I He

Brian C Sales

Roeland Feenstra

Jorulf Brynestad

Carl C Koch

Amit Goval

Huey S Hsu

Venkat Selvamanickam

The present invention relates to epitaxial, electrically conducting and mechanically robust, cubic nitride buffer layers deposited epitaxially on biaxially textured substrates such as metals and alloys. The invention comprises of a biaxially textured substrate with epitaxial layers of nitrides. The invention also discloses a method to form such epitaxial layers using a high rate deposition method as well as without the use of forming gases. The invention further comprises epitaxial layers of oxides on the biaxially textured nitride layer. In some embodiments the article further comprises electromagnetic devices which may have superconducting properties.

Conductive and robust nitride buffer layers on biaxially textured substrates

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 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}&#x3c;100&#x3e; orientation texture; and further having a Curie temperature less than that of pure Ni.

Biaxially textured articles formed by powder metallurgy

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 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}&#x3c;100&#x3e; orientation texture; and further having a Curie temperature less than that of pure Ni.

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 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 &lcub;100&rcub;<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

The present invention relates to epitaxial, electrically conducting and mechanically robust, cubic nitride buffer layers deposited epitaxially on biaxially textured substrates such as metal and alloys. The invention comprises of a biaxially textured substrate with epitaxial layers of nitrides. The invention also discloses a method to form such epitaxial layers using a high rate deposition method as well as without the use of forming gases. The invention further comprises epitaxial layers of oxides on the biaxially textured nitride layers. In some embodiments the article further comprises electromagnetic devices which may be super conducting properties.

A method for forming an electronically active biaxially textured article includes the steps of providing a substrate having a single crystal metal or metal alloy surface, deforming the substrate to form an elongated substrate surface having biaxial texture and depositing an epitaxial electronically active layer on the biaxially textured surface. The method can include at least one annealing step after the deforming step to produce the biaxially textured substrate surface. The invention can be used to form improved biaxially textured articles, such as superconducting wire and tape articles having improved J values.

Powder-in-tube and thick-film methods of fabricating high temperature superconductors having enhanced biaxial texture

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&mdash;Cu, Ag&mdash;Pd, Ni&mdash;Cu, Ni&mdash;V, Ni&mdash;Mo, Ni&mdash;Al, Ni&mdash;Cr&mdash;Al, Ni&mdash;W&mdash;Al, Ni&mdash;V&mdash;Al, Ni&mdash;Mo&mdash;Al, Ni&mdash;Cu&mdash;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 &lcub;100&rcub;<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

Biaxially textured articles formed by power metallurgy

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 preform 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 &lcub;100&rcub;<100> orientation texture; and further having a Curie temperature less than that of pure Ni.

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Knoxville, TN, United States of America

Donald M Kroeger