Superconductive property and microstructure of MgB2 particle-dispersed aluminum based composite materials

Manabu Mizutani*, Kenji Matsuda, Kazuya Makino, Katsuhiko Nishimura, Tokimasa Kawabata, Yoshimitsu Hishinum, Shigeki Aoyama, Susumu Ikeno

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Superconducting wires have been applied for the fabrication of superconducting magnets in nuclear magneto-resonance (NMR), Magneto-resonance imaging (MRI) and so on. MgB2 has the highest critical temperature of superconducting transition (TC=39K) among intermetallic compound superconductive materials. This means that MgB2 Superconductive wire doesn't need expensive liquid He for cooling. We used the original method of the three-dimensional penetration casting (3DPC) in this laboratory to fabricate the MgB2/Al composite. Our 3DPC method for fabricating composite materials can disperse particles in the matrix homogenously without any aggregation and control volume fractions of composites within the range of 4 - 40%, even when particle size is less than 1 μm. Thus, these composite materials can be processed by machining, extrusion and rolling. In the composite material we made, MgB2 particles dispersed to the Al matrix uniformly. The TC was determined by electrical resistivity and magnetization to be about 37 - 39K. We succeeded in extruding MgB2/Al composite billet to 1mmφ ?wire. Microstructures of these samples have been confirmed by SEM method. MgB2/Al composite billet and extruded wire were showed there no cracks inside the materials.

Original languageEnglish
Title of host publicationPRICM7
PublisherTrans Tech Publications Ltd
Pages2759-2762
Number of pages4
ISBN (Print)0878492550, 9780878492558
DOIs
StatePublished - 2010
Event7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, Australia
Duration: 2010/08/022010/08/06

Publication series

NameMaterials Science Forum
Volume654-656
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Country/TerritoryAustralia
CityCairns, QLD
Period2010/08/022010/08/06

Keywords

  • Aluminum
  • Composite material
  • Extrusion
  • MgB
  • Microstructure
  • Superconductivity

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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