Paper Title:
Superconductive Property and Microstructure of MgB2 Particle-Dispersed Aluminum Based Composite Materials
  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 m. 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 1mm 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.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
2759-2762
DOI
10.4028/www.scientific.net/MSF.654-656.2759
Citation
M. Mizutani, K. Matsuda, K. Makino, K. Nishimura, T. Kawabata, Y. Hishinuma, S. Aoyama, S. Ikeno, "Superconductive Property and Microstructure of MgB2 Particle-Dispersed Aluminum Based Composite Materials", Materials Science Forum, Vols. 654-656, pp. 2759-2762, 2010
Online since
June 2010
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$32.00
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