A Superconducting Joint Technique for Round Wires

پیشرفتهای اخیر در زمینه ساخت سیم و نوار ابررسانای MgB2

 MgB2 wire and tape were prepared using the powder in tube and reaction in-situ technique. All samples were characterized using the XRD, SEM, TEM, as well as transport and magnetic measurements. High transport and magnetic critical current density values have been obtained for metal-clad wires and tapes. Different sheath materials have been examined, but Fe appears to be the best sheath for MgB...

Overcritical state in superconducting round wires sheathed by iron

Fluctuation Effects on a Strongly Pinned Vortex Lattice in a Thin Type-II Superconducting Wire.

We report on transport properties of the vortex lattice in fine, round NbTi wires fabricated by a novel wire-drawing process. The voltage onset in the isothermal I-V characteristic is sharp for thick wires sd $ 1 mmd at 4.2 K and 6 T, but is rounded for thinner wires. The thinnest wires also display an Ohmic resistivity at low current densities. This linear resistivity decreases exponentially w...

Evaluation of frictional resistance between monocrystalline (ICE) brakcets and Stainless Steel, Beta TMA and NiTiarch wires

Introduction: When using sliding mechanics for space closure during orthodontic treatment, friction occurs at the bracket-wire interface. The aim of this study was to evaluate the frictional resistance between monocrystalline (ICE) brackets and Stainless Steel, Beta TMA and NiTi wires. Methods: In this experimental study, we used 5 different types of orthodontic wires. Brackets and wires wer...

Developments in Superconducting Wires and Magnets

We have been developing superconducting wires and magnets for over 40 years and decided to focus on the NMR field in the early 1990s. Japan Superconductor Technology Inc., established in 2002, has successfully applied the R&D achievement of Kobe Steel to their production of superconducting wires and magnets. This article describes developments in superconducting wires and magnets with focus on ...