Patents by Inventor Nobuya Banno

Nobuya Banno 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: 20240242857
    Abstract: The present invention addresses the problem of providing: a superconducting connection structure of an Nb3Sn superconducting wire rod and an NbTi wire rod, the superconducting connection structure comprising no environmental load substances such as Pb and Cd; a method for producing this superconducting connection structure; and a nuclear magnetic resonance apparatus which uses this superconducting connection structure. A superconducting connection structure according to the present invention is provided with: a connection strip that comprises an Nb alloy strip to which an element M is added (wherein the element M is an element which increases the recovery temperature and the recrystallization temperature of Nb); an Nb3Sn superconducting wire rod that comprises an Nb3Sn superconducting core material; and an NbTi wire rod that comprises an NbTi core material.
    Type: Application
    Filed: May 11, 2022
    Publication date: July 18, 2024
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventor: Nobuya BANNO
  • Patent number: 11476017
    Abstract: In the production of an internal-tin-processed Nb3Sn superconducting wire, the present invention provides a Nb3Sn superconducting wire that is abundant in functionality, such as, the promotion of formation of a Nb3Sn layer, the mechanical strength of the superconducting filament (and an increase in interface resistance), the higher critical temperature (magnetic field), and the grain size reduction, and a method for producing it. A method for producing a Nb3Sn superconducting wire according to an embodiment of the present invention includes a step of providing a bar 10 that has a Sn insertion hole 12 provided in a central portion of the bar 10 and a plurality of Nb insertion holes 14 provided discretely along an outer peripheral surface of the Sn insertion hole 12, and that has an alloy composition being Cu-xZn-yM (x: 0.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 18, 2022
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Nobuya Banno, Kyoji Tachikawa
  • Publication number: 20200020463
    Abstract: In the production of an internal-tin-processed Nb3Sn superconducting wire, the present invention provides a Nb3Sn superconducting wire that is abundant in functionality, such as, the promotion of formation of a Nb3Sn layer, the mechanical strength of the superconducting filament (and an increase in interface resistance), the higher critical temperature (magnetic field), and the grain size reduction, and a method for producing it. A method for producing a Nb3Sn superconducting wire according to an embodiment of the present invention includes a step of providing a bar 10 that has a Sn insertion hole 12 provided in a central portion of the bar 10 and a plurality of Nb insertion holes 14 provided discretely along an outer peripheral surface of the Sn insertion hole 12, and that has an alloy composition being Cu-xZn-yM (x: 0.
    Type: Application
    Filed: February 26, 2018
    Publication date: January 16, 2020
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Nobuya BANNO, Kyoji TACHIKAWA
  • Patent number: 9037203
    Abstract: A composite barrier-type Nb3Al superconducting multifilament wire material comprises Nb barrier filaments, Ta barrier filaments, Nb bulk dummy filaments, and a Nb or Ta covering. In the composite barrier-type Nb3Al superconducting multifilament wire material, the Nb barrier filaments and Ta barrier filaments are disposed in the wire material so that the Nb barrier filaments are concentrated in a filament region near a core formed from the Nb bulk dummy filaments and only the Ta barrier filaments are disposed or the Nb barrier filaments are dispersed in the Ta barrier filaments in an outer layer portion formed from a region outside the Nb barrier filaments, excluding the Nb or Ta covering.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: May 19, 2015
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Nobuya Banno, Takao Takeuchi
  • Publication number: 20130316909
    Abstract: A composite barrier-type Nb3Al superconducting multifilament wire material comprises Nb barrier filaments, Ta barrier filaments, Nb bulk dummy filaments, and a Nb or Ta covering. In the composite barrier-type Nb3Al superconducting multifilament wire material, the Nb barrier filaments and Ta barrier filaments are disposed in the wire material so that the Nb barrier filaments are concentrated in a filament region near a core formed from the Nb bulk dummy filaments and only the Ta barrier filaments are disposed or the Nb barrier filaments are dispersed in the Ta barrier filaments in an outer layer portion formed from a region outside the Nb barrier filaments, excluding the Nb or Ta covering.
    Type: Application
    Filed: January 13, 2012
    Publication date: November 28, 2013
    Inventors: Nobuya Banno, Takao Takeuchi
  • Patent number: 7354486
    Abstract: A composite multi-core wire rod in which a plurality of Al alloy wires containing 15 at % to 40 at % of Ge are arranged in Nb matrix at a core diameter of 2 ?m to 20 ?m is subjected to heating for at least five hours at a temperature ranging from 1300° C. to 1600° C.; and additionally heating at a temperature ranging from 650° C. to 900° C.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: April 8, 2008
    Assignee: National Institute for Materials Science
    Inventors: Nobuya Banno, Takao Takeuchi
  • Publication number: 20060180246
    Abstract: A composite multi-core wire rod in which a plurality of Al alloy wires containing 15 at % to 40 at % of Ge are arranged in Nb matrix at a core diameter of 2 ?m to 20 ?M is subjected to heating for at least five hours at a temperature ranging from 1300° C. to 1600° C.; and additionally heating at a temperature ranging from 650° C. to 900° C.
    Type: Application
    Filed: July 15, 2004
    Publication date: August 17, 2006
    Inventors: Nobuya Banno, Takao Takeuchi
  • Patent number: 6570096
    Abstract: This invention provides a production method of Nb3Al superconducting multifilamentary wire based on rapid-heating, quenching and transformation method, capable of producing a high-performance Nb3Al superconducting multifilamentary wire by improving critical temperature thereof, upper critical field and critical current density. Upon a first stage heat treatment of beating a composite, in which bcc phase Nb—Al supersaturated solid solution is dispersed in Nb matrix, the bcc phase Nb—Al supersaturated solid solution ordered in temperature rise process is made disordered at an initial phase thereof and a non-reacting portion located adjacent is heated using a reaction heat generated when transforming this disordered bcc phase to A15 phase. Then, disordering of the bcc phase is promoted while propagating a high-temperature transformation region so as to automatically progress high-temperature beat treatment.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: May 27, 2003
    Assignee: National Institute for Materials Science
    Inventors: Takao Takeuchi, Nobuya Banno, Toshihisa Asano, Hitoshi Wada
  • Publication number: 20020037815
    Abstract: This invention provides a production method of Nb3Al superconducting multifilamentary wire based on rapid-heating, quenching and transformation method, capable of producing a high-performance Nb3Al superconducting multifilamentary wire by improving critical temperature thereof, upper critical field and critical current density.
    Type: Application
    Filed: May 25, 2001
    Publication date: March 28, 2002
    Inventors: Takao Takeuchi, Nobuya Banno, Toshihisa Asano, Hitoshi Wada