Apr 9 – 13, 2018
Beurs van Berlage
Europe/Zurich timezone

Annealing Effects on Residual Resistivity Ratio of Internal Tin Nb3Sn-wires with Distributed Barriers

Apr 10, 2018, 5:00 PM
1h 30m
Beurs van Berlage

Beurs van Berlage

Damrak 243, 1012 ZJ Amsterdam, Netherlands
Board: 2AMSP02
Magnets Poster session

Speaker

Ildar Abdyukhanov (VNIINM (Bochvar Institute))

Description

One of the critical parameters of the high Jc internal tin Nb3Sn strands designated for the high field magnets of the FCC project is essentially high RRR value exceeding 150. In this work Oxygen free high-purity copper with RRR>400 was used for production of internal tin Nb3Sn wires of 0,7 and 1 mm in dia with 37 sub-elements in distributed diffusion Nb-barriers. Final reactions from 25 to 100 hours were given at 665 oC to investigate the changes in RRR-values. It was shown that target for RRR-level of 150 is realized for duration time not more than 50 and 25 hours for strands with 1 and 0.7 mm in dia accordingly. It has been shown that RRR is affected by tin diffusion through weak regions of Nb-barriers. It was revealed, that irregularity shape of diffusion barriers has been the decisive factor that influenced on the time limit at the chosen temperature of final stage of reaction heat treatment. The model for RRR-degradation due to tin diffusion into copper matrix is proposed.

Primary author

Ildar Abdyukhanov (VNIINM (Bochvar Institute))

Co-authors

Maxim Alekseev (Bochvar Institute of Inorganic Materials) Aliev Ruslan (Bochvar Institute of Inorganic Materials) Maria Krylova (Bochvar Institute of Inorganic Materials) Pavel Lukyanov (Bochvar Institute of Inorganic Materials) Konstantin Mareev (Bochvar Institute of Inorganic Materials) Daria Novosilova (Bochvar Institute of Inorganic Materials) Victor Pantsyrny (Bochvqr Institute) Maria Polikarpova (Bochvar Institute of Inorganic Materials) Mickael Potapenko (Bochvar Institute of Inorganic Materials) Alexander Silaev (Bochvar Institute of Inorganic Materials) Anastasia Tsapleva (Bochvar Institute of Inorganic Materials) Evgeniy Zubok (Bochvar Institute of Inorganic Materials) Sergey Zernov (TVEL)

Presentation materials

There are no materials yet.