TY - GEN
T1 - Development of practical oxide superconductors by vapor deposition and bulk processing techniques
AU - Shaw, David T.
PY - 1991
Y1 - 1991
N2 - The fabrication of high-temperature superconducting films was developed by both laser deposition and bulk processing techniques. By laser deposition, the growth of YBa2Cu3O6.8(YBCO) films on various kinds of substrates was studied. These substrates included single crystal ZrO2(100) and MgO(100), randomly oriented polycrystalline yttrium-stabilized zirconia, metallic Ni-Cr-Mo alloys and amorphous silicate glassess. Tc of 90K and Jc above 106 A/cm2 at 77K were achieved for YBCO films on single crystal substrates. Also, Tc around 87K and Jc of 3 104A/cm2 at 77K were achieved for YBCO films on polycrystalline and metallic substrates with an assistance of a buffer layer. These critical current densities were among the highest data reported. However, there were still obstacles to the development of YBCO films on polycrystalline and metallic substrates. We found that enhancement of the degree of the alignment in the a-b plane of c-axis oriented polycrystalline films was required to improve the transport properties of these superconducting films. Furthermore, by using bulk processing, Bi-based films were fabricated on silver tapes. These superconducting tapes showed more attractive magnetic flux pinning and the Jc degraded about 50% even in the presence of a 9 tesla field parallel to the film surface.
AB - The fabrication of high-temperature superconducting films was developed by both laser deposition and bulk processing techniques. By laser deposition, the growth of YBa2Cu3O6.8(YBCO) films on various kinds of substrates was studied. These substrates included single crystal ZrO2(100) and MgO(100), randomly oriented polycrystalline yttrium-stabilized zirconia, metallic Ni-Cr-Mo alloys and amorphous silicate glassess. Tc of 90K and Jc above 106 A/cm2 at 77K were achieved for YBCO films on single crystal substrates. Also, Tc around 87K and Jc of 3 104A/cm2 at 77K were achieved for YBCO films on polycrystalline and metallic substrates with an assistance of a buffer layer. These critical current densities were among the highest data reported. However, there were still obstacles to the development of YBCO films on polycrystalline and metallic substrates. We found that enhancement of the degree of the alignment in the a-b plane of c-axis oriented polycrystalline films was required to improve the transport properties of these superconducting films. Furthermore, by using bulk processing, Bi-based films were fabricated on silver tapes. These superconducting tapes showed more attractive magnetic flux pinning and the Jc degraded about 50% even in the presence of a 9 tesla field parallel to the film surface.
UR - https://www.scopus.com/pages/publications/0025872221
M3 - Conference contribution
AN - SCOPUS:0025872221
SN - 0873391349
T3 - Proc 3 Symp High Temp Supercond Compd
SP - 143
EP - 161
BT - Proc 3 Symp High Temp Supercond Compd
PB - Publ by Minerals, Metals & Materials Soc (TMS)
ER -