Article
Materials Science, Multidisciplinary
Rahmatul Hidayati, Jin Hee Kim, Soon-Gil Jung, Ki-Sub Cho, Jae Hyun Yun, Jong-Soo Rhyee
Summary: We investigated the superconducting properties of medium entropy alloys Nb2/5Hf1/5Zr1/5Ti1/5 synthesized by different methods. The samples exhibited different superconducting transition temperatures and critical magnetic fields. The spark plasma sintering method showed better performance in critical current density, suggesting possible practical applications.
Article
Physics, Applied
Reed Teyber, Maxim Marchevsky, Aurora Cecilia Araujo Martinez, Soren Prestemon, Jeremy Weissz, Danko van der Laan
Summary: A network model is developed to simulate current and voltage distributions around defects in ReBCO tape cables. The results show that the power dissipation in the I-V curve strongly depends on the magnitude of the defect. Additionally, optimal cable layering topologies are recommended based on reel-to-reel tape measurements using a differential evolution algorithm.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Review
Crystallography
Zezhao Wen, Hongye Zhang, Markus Mueller
Summary: This paper summarizes the latest advances in the field of high-temperature superconducting flux pumps, clarifies their working mechanisms, commonly adopted modeling approaches, and provides objective analyses of their applicability. It also specifies the primary challenges for implementing high-temperature superconducting flux pumps and proposes suggestions for improving this wireless excitation technology.
Article
Automation & Control Systems
Jianzhao Geng, Rodney A. Badcock, Chris W. Bumby
Summary: A novel mechanism of inductively energizing closed-loop HTS dc magnets has been discovered, which eliminates the need for electronic power supplies and bulky current leads. This new approach reduces the footprint and power demand of HTS magnet systems, opening up new opportunities for the technology's applications.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Energy & Fuels
Chao Li, Gengyao Li, Ying Xin, Bin Li
Summary: In this study, a novel dc conversion device using variable superconducting inductor is proposed to adjust the operating current of closed HTS coils flexibly and efficiently. Experimental results demonstrate that the proposed device can tune the current in a wide range with little power loss. Simulation tests further explore the working details and application potential. Besides adjusting the current, the device can also compensate field decay of the HTS magnets caused by joint resistance or external field.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Electrical & Electronic
Kensuke Kobayashi, Gen Nishijima, Kotaro Ohki, Tatsuoki Nagaishi, Akira Uchida, Hitoshi Kitaguchi
Summary: We evaluated the joint resistance and current-carrying capacity of the intermediate grown superconducting (iGS) joint at low temperatures and high magnetic fields using a specially developed evaluation system. The results showed that the iGS joint has a sufficiently high current-carrying capacity at 4.2K in a 3T magnetic field and does not exhibit magnetic field dependence. However, at 77K, the joint resistance was relatively high due to a high load factor.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Review
Metallurgy & Metallurgical Engineering
Hao Liang, Dipak Patel, Mahboobeh Shahbazi, Andrzej Morawski, Daniel Gajda, Matt Rindfleisch, Richard Taylor, Yusuke Yamauchi, Md Shahriar A. Hossain
Summary: Magnesium diboride (MgB2) magnets have the potential to be the next-generation liquid-helium-free magnet for magnetic resonance imaging (MRI) application. This literature review summarizes research and development on MgB2 superconducting joining technology.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Physics, Applied
Yanchang Zhu, Dongliang Wang, Qiqi Wang, Zhan Zhang, Wenwen Guo, He Huang, Hongjun Ma, Fang Liu, Huajun Liu, Yanwei Ma
Summary: This study estimated the connection resistance of iron-based superconducting joints for the first time using the field-decay method, and found that BaK-122 superconducting joints have great potential for a range of practical applications.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Scott Fuller, Mohamed Sheikh, Greg Baty, Choong-Un Kim, Tae-Kyu Lee
Summary: The experimental observations suggest that current flow strengthens solder joints against shear load, while the Joule heat effect has the opposite effect.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Thermodynamics
Boyang Shen, Yu Chen, Chuanyue Li, Sheng Wang, Xiaoyuan Chen
Summary: This article introduces the important application of superconducting fault current limiters in power systems and demonstrates the experiment, numerical model, and software model related to modern energy systems. The study validates the reliability of the model through experiments and compares the advantages of the FEM method and PSCAD model.
Article
Physics, Applied
Luning Hao, Fangliang Dong, Jiabin Yang, Ismail Patel, Haigening Wei, Qi Wang, Jintao Hu, Mengyuan Tian, Adil Shah, Boyang Shen, Tim Coombs
Summary: Magnetic switches, commonly used in charging HTS-coated conductor magnets, can cause a critical current reduction due to the enhanced self-field of the HTS tape by iron cores. In this study, we present analytical approximations to calculate the self-field distribution and verify the results using experiments and 3D finite element method models. The solutions can determine the critical current reduction quickly and accurately, and simplify the design process of magnetic switches.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Leonid Burlachkov, Nikita Fuzailov
Summary: The study identifies two competing regimes of ac magnetic response in current-carrying type-II superconducting wires, with the appearance of an out-of-phase peak in voltage being attributed to the inhibitory effect of zero-field lines on flux motion. The phase diagram constructed enables the distinction between in-phase and out-of-phase regimes.
Article
Physics, Applied
Rongtie Huang, Jing Chen, Zhiyong Liu, Wenzhi Dou, Ning Zhang, Chuanbing Cai
Summary: In this study, monodisperse BaZrO3 (BZO) nanocrystals were successfully introduced into superconducting tapes as effective pinning centers. The superconducting performances of BZO-added tapes were systematically investigated and it was found that the 5% BZO addition showed the best performance. The BZO addition strategy can be extended to different types of samples and is valuable for in-field applications.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
S. Ito, H. Tamura, N. Yanagi, H. Hashizume
Summary: This paper presents the progress in electrical and mechanical performances of the mechanical joints of HTS conductors and methods to evaluate their quality for segment-fabrication of HTS helical coils. R&D of joint performance has progressed over the past decade and it shows acceptable performance for the HTS helical coils. The contact-probing current transfer length method and x-ray computer tomography scanning are promising for quality assessment of the joints and HTS tapes.
Article
Physics, Applied
Y. Takeda, G. Nishijima, U. Nakai, T. Motoki, J. Shimoyama, H. Kitaguchi
Summary: This study systematically evaluates the angular dependence of resistance and critical current of a Bi-2223 superconducting joint in a closed-loop sample using a joint resistance evaluation system. The results show that the resistance and critical current of the joint depend on the angle of the magnetic field, and exhibit different characteristics in different angle ranges.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
