Oxidized hastelloy cloth insulation for a wind-and-react processed Ag/Bi2Sr2CaCu2O8 superconducting magnet

Kazuo Watanabe, G. Nishijima, Satoshi Awaji, Y. Hikichi, T. Hasegawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Practical multifilamentary Ag/Bi2Sr2CaCu 2O8 round wires 1 mm in diameter exhibit critical current properties without anisotropy in fields up to 30 T and 4.2 K. We concentrate on the development of a Ag/Bi2Sr2CaCu2O 8 insert coil by a wind-and-react method for a high field NMR superconducting magnet. Hastelloy cloth was used for the insulation for the wind-and-react process. A 0.05 mm Hastelloy X (Hx) filament was knitted into a braid tube, and has a high mechanical strength and a good tolerance to oxidization at high temperature. We fabricated multifilamentary Ag/Bi 2Sr2CaCu2O8 wires with Hx cloth, and heat-treated them at around 890 °C in an oxygen atmosphere. It was found that the surface of Hx cloth is oxidized enough for a good electric insulation. Multifilamentary Ag/Bi2Sr2CaCu2O8 wires with oxidized Hx cloth insulation have the critical current of 720 A at 4.2 K in a self field.

Original languageEnglish
Title of host publicationADVANCES IN CRYOGENIC ENGINEERING
Subtitle of host publicationTransactions of the International Cryogenic Materials Conference, ICMC, Volume 52B
Pages704-709
Number of pages6
DOIs
Publication statusPublished - 2006 Mar 31
EventADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference, ICMC - Keystone, CO, United States
Duration: 2005 Aug 292005 Sep 2

Publication series

NameAIP Conference Proceedings
Volume824 II
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherADVANCES IN CRYOGENIC ENGINEERING: Transactions of the International Cryogenic Materials Conference, ICMC
CountryUnited States
CityKeystone, CO
Period05/8/2905/9/2

Keywords

  • BiSrCaCuO wire
  • Electric insulation
  • Hastelloy cloth
  • Wind-and-react precess

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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