Journal ArticleDOI
Residual strain estimation in multifilamentary Nb/sub 3/Sn wires with CuNb reinforcement
K. Watanabe,Kazumune Katagiri,Koshichi Noto,K. Awaji,Satoshi Awaji,Goto Kenji,Sadakata Nobuyuki,Saito Takashi,Osamu Kohno +8 more
TLDR
In this article, the critical current of the Nb/sub 3/sn wires reinforced with CuNb composite were measured, and the estimation of residual strain was performed using a rule of mixtures.Abstract:
The bronze processed multifilamentary Nb/sub 3/Sn superconducting wires with Cu-20 wt.% Nb composite reinforcement, which exhibited the high yield stress even after a typical heat treatment of about 700/spl deg/C for 8 days, have been fabricated. The strain effects on the critical current of the Nb/sub 3/Sn wires reinforced with CuNb composite were measured, and the estimation of residual strain was performed using a rule of mixtures. Good agreement is obtained between measured and calculated residual strain values. >read more
Citations
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Journal ArticleDOI
(Nb,Ti)/sub 3/Sn superconducting wire with CuNb reinforcing stabilizer
Hisaki Sakamoto,S. Endoh,Y. Nagasu,K. Wada,A. Kimura,S. Meguro,Satoshi Awaji,K. Watanabe,M. Motokawa +8 more
TL;DR: In this paper, a 1 mm-diameter (Nb,Ti)/sub 3/Sn superconducting wire with Cu-20 wt%Nb reinforcing stabilizer was fabricated 22 km in length.
Journal ArticleDOI
Development of high-strength Nb/sub 3/Sn conductor
TL;DR: In this article, a 1.2 mm-diameter (Nb, Ti)/sub 3/Sn superconducting wire of 13 km in length reinforced with Cu-Ni/Nb-Ti was successfully fabricated.
Journal ArticleDOI
Normal zone propagation and quench characteristics of Nb/sub 3/Sn wires with jelly-roll and in-situ processed CuNb reinforcements
Satoru Murase,Tomoyuki Murakami,T. Seto,Susumu Shimamoto,Satoshi Awaji,K. Watanabe,Saito Takashi,G. Iwaki,S. Meguro +8 more
TL;DR: In this paper, the stability of three types of reinforced Nb/sub 3/Sn wires has been experimentally studied in order to clarify effects of critical current density, J/sub c/, and Nb fraction in CuNb reinforcements.
Journal ArticleDOI
Thermal stability of reinforced Nb3Sn composite superconductor under cryocooled conditions
TL;DR: In this paper, the minimum quench energy (MQE) under cryocooled conditions of some reinforced Nb 3 Sn wires was measured and it was shown that thermal stability expressed as MQE was controlled by the temperature margin between the temperature of the operating condition and the transition temperature from superconductivity to normal.
Journal ArticleDOI
A study of the microscopic deformation behavior of Nb3Sn composite superconducting tape using the acoustic emission technique
TL;DR: In this article, the microscopic deformation behavior and the fracture mechanism of Nb 3 Sn-based composite superconducting tape were investigated using acoustic emission (AE) technique at room temperature.
References
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Journal ArticleDOI
Strain scaling law for flux pinning in practical superconductors. Part 1: Basic relationship and application to Nb3Sn conductors
TL;DR: In this article, the authors present the basic uniaxial-strain scaling relationship and focus on its application to Nb3Sn conductors, and propose a general scaling relation which unifies the usual temperature scaling relation with this strain-scaling relation.
Journal ArticleDOI
(Nb, Ti)3sn Superconducting Magnet Operated At 11 K In Vacuum Using High-Tc (Bi, Pb)2sr2ca2cu30io Current Leads
Kazuo Watanabe,Yutaka Yamada,Junji Sakuraba,Fumiaki Hata,Chin Kung Chong,Tsuginori Hasebe,Mamoru Ishihara +6 more
TL;DR: In this article, a conduction-cooled superconducting magnet using high-Tc oxide current leads was successfully demonstrated, which achieved a magnetic field of 4.6 T in a 50 mm bore (38 mm room temperature bore).
Journal ArticleDOI
A prediction of the stress state in Nb3Sn superconducting composites
TL;DR: In this article, a simple analytical method was proposed to predict the residual stress state and the stress strain curves of Nb3Sn composites at 4.2 K. The method requires only a prior knowledge of the volume fraction of the composite components and the percentage of the Nb converted to Nb 3Sn.
Journal ArticleDOI
Highly strengthened multifilamentary (Nb,Ti)/sub 3/Sn wires stabilized with CuNb composite
K. Watanabe,Satoshi Awaji,K. Katagiri,K. Noto,Goto Kenji,M. Sugimoto,Saito Takashi,Osamu Kohno +7 more
TL;DR: In this paper, the authors developed a multilamentary (Nb,Ti)/sub 3/sn superconducting wire with reinforcing stabilizer of CuNb composite, which was obtained to be 110 A/mm/sup 2/ at 16 T and 4.2 K.
Journal ArticleDOI
Nb/sub 3/Sn multifilamentary wires with CuNb reinforcing stabilizer
K. Watanabe,A. Hoshi,Satoshi Awaji,Kazumune Katagiri,Koshichi Noto,Goto Kenji,M. Sugimoto,Saito Takashi,Osamu Kohno +8 more
TL;DR: In this article, a bronze processed multifilamentary Nb/sub 3/Sn superconducting wire with CuNb reinforcing stabilizer, which exhibits a residual resistance ratio of 20 and a magnetoresistance of 0.2 mu Omega -cm at 23 T and 4.2 K, was developed.