TY - GEN
T1 - Superconductive property and microstructure of MgB2 particle-dispersed aluminum based composite materials
AU - Mizutani, Manabu
AU - Matsuda, Kenji
AU - Makino, Kazuya
AU - Nishimura, Katsuhiko
AU - Kawabata, Tokimasa
AU - Hishinum, Yoshimitsu
AU - Aoyama, Shigeki
AU - Ikeno, Susumu
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Aluminum
KW - Composite material
KW - Extrusion
KW - MgB
KW - Microstructure
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=77955492014&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.654-656.2759
DO - 10.4028/www.scientific.net/MSF.654-656.2759
M3 - 会議への寄与
AN - SCOPUS:77955492014
SN - 0878492550
SN - 9780878492558
T3 - Materials Science Forum
SP - 2759
EP - 2762
BT - PRICM7
PB - Trans Tech Publications Ltd
T2 - 7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Y2 - 2 August 2010 through 6 August 2010
ER -