Fabrication of Nb3Al and Nb3(Al,Ge) superconducting composite tapes by electron beam irradiation

Kumakura, H.; Togano, K.; Tachikawa, K.; Tsukamoto, S.; Irie, H.
July 1986
Applied Physics Letters;7/7/1986, Vol. 49 Issue 1, p46
Academic Journal
Nb3Al and Nb3(Al,Ge) superconductors were synthesized using continuous electron beam irradiation on powder metallurgy processed Nb-Al and Nb-Al-Ge composite tapes. Transition temperatures Tc(onset) of 18.5 and 20.2 K were obtained for Nb-Al and Nb-Al-Ge tapes respectively, which indicated that nearly stoichiometric Al5 compounds were formed. Critical current density Jc (for reacted area) is nearly constant at fields above 15 T, with excellent values of ∼2×104 A/cm2 at 23 T and 4.2 K for both tapes. The excellent Jc’s as well as the easy scale-up procedure indicate that electron beam irradiation is promising for the fabrication of practical Nb3Al and Nb3(Al,Ge) superconductors, which can generate extremely high fields of ∼25 T.


Related Articles

  • Nb3Sn(Ti) powder metallurgy processed high field superconductors. Pourrahimi, S.; Thieme, C. L. H.; Foner, S.; Suenaga, M. // Applied Physics Letters;6/30/1986, Vol. 48 Issue 26, p1808 

    Powder metallurgy processed Nb3Sn(Ti) superconducting wires were fabricated with Sn x wt. % Ti cores for 0≤x≤3, 16 or 22 vol % cores, and a Cu 45 wt. % Nb composite. The processing used swaging, cold hydrostatic extrusions, wire drawing and heat treatments of 750 °C for two to...

  • Bi(Pb)-Sr-Ca-Cu-O superconducting composite tapes prepared by the powder method using an Ag sheath. Kumakura, H.; Togano, K.; Maeda, H.; Mimura, M. // Journal of Applied Physics;4/1/1990, Vol. 67 Issue 7, p3443 

    Presents a study which prepared a bismuth-based oxide superconducting tapes containing high-T[subc] and low-T[subc] phases by the powder metallurgy method using a silver sheath. Impact of high-T[subc] oxide superconductors on the field of superconductor application; Advantages of the oxide...

  • A controllable vibratory calciner for processing high-temperature superconductors and other ceramic powders. Spencer, Nicholas D.; Beeckman, Jean W.; Peders, Thorvald S.; Cameron, Craig P. // Review of Scientific Instruments;May90, Vol. 61 Issue 5, p1525 

    A novel vibratory calcination apparatus is described, that enables reactant powders to be heated at or above their sintering temperatures without excessive agglomeration. In addition, the vibration-induced fluidization leads to greatly improved gas-solid contact, which can significantly speed up...

  • Correlation of Microstructure with Hardness and Wear Resistance in (TiC,SiC)/Stainless Steel Surface Composites Fabricated by High-Energy Electron-Beam Irradiation. Eunsub Yun; Yong Chan Kim; Sunghak Lee; Kim, Nack J. // Metallurgical & Materials Transactions. Part A;Mar2004, Vol. 35 Issue 3A, p1029 

    Stainless-steel-based surface composites reinforced with TiC and SiC carbides were fabricated by high-energy electron beam irradiation. Four types of powder/flux mixtures, i.e., TiC, (Ti + C), SiC, and (Ti + SiC) powders with 40 wt. pct of CaF2 flux, were deposited evenly on an AISI 304...

  • Sintering mechanism of Ag-doped MgB2 superconductor from low temperature to high temperature. Ning, B. Q.; Jiang, H.; Yan, Z. S. // Journal of Materials Science: Materials in Electronics;Jul2010, Vol. 21 Issue 7, p666 

    Combined with thermal analysis and phase identification, the sintering process of Ag-doped MgB2 superconductor was investigated. It is found that the Ag doping could form Mg–Ag liquid through the eutectic reaction at low temperature (about 470 °C) and then obviously accelerated the...

  • Crystallographically oriented superconducting Bi2Sr2CaCu2O8 by shock compaction of prealigned powder. Seaman, C. L.; Weir, S. T.; Early, E. A.; Maple, M. B.; Nellis, W. J.; McCandless, P. C.; Brocious, W. F. // Applied Physics Letters;7/2/1990, Vol. 57 Issue 1, p93 

    Highly textured specimens of Bi2Sr2CaCu2O8 were obtained by shock compaction of powder at 30–140 kbar and by sintering. The compacts were characterized by x-ray diffraction, magnetic susceptibility, electrical resistance, optical microscopy, and scanning electron microscopy data....

  • Target density and surface state effects on the compositional changes in iron oxide particle aggregated films prepared by laser ablation. Zbroniec, L.; Sasaki, T.; Koshizaki, N. // Applied Physics A: Materials Science & Processing;2005, Vol. 80 Issue 1, p145 

    Iron oxide nanoparticle aggregated films were pre- pared using the excimer laser ablation technique by adopting an off-axis configuration and the gas condensation process. Sintered iron oxide (α-Fe2O3) targets were ablated in oxygen ambient by an ArF excimer laser. The product of ablation...

  • The Layer by Layer Selective Laser Synthesis of Ruby. Vlasova, M.; Ragulya, A.; Stetsenko, V.; Kakazey, M.; Aguilar, P. A. Marquez; Timofeeva, I.; Tomila, T.; Arellano, E. A. Juarez // Science of Sintering;Jan2010, Vol. 42 Issue 1, p3 

    In the work, features of the layer-by-layer selective laser synthesis (SLS) of ruby from an Al2O3-Cr2O3 mixture are considered depending on the irradiation power, the laser beam traverse speed, the height and amount of the backfill of powder layers. It has been established that, under...

  • Structural conditionality for the quadratic nonlinear susceptibility of Sr1− x Ba x Nb2O6 crystals. Chernaya, T. S.; Marychev, M. O.; Ivanov, V. A.; Ivanov, N. J.; Chuprunov, E. V.; Ivleva, L. I.; Simonov, V. I. // Crystallography Reports;Nov2007, Vol. 52 Issue 6, p1056 

    The intensity of the second harmonic generated in powdered samples of the compositions Sr0.75Ba0.25Nb2O6, Sr0.61Ba0.39Nb2O6, and Sr0.50Ba0.50Nb2O6 under irradiation by a pulsed-periodic YAG: Nd laser is measured. The effective values of the quadratic nonlinear susceptibility of these materials...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics