Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB2

Muralidhar Miryala; Sai Srikanth Arvapalli; Naomichi Sakai; Masato Murakami; Hidehiko Mochizuki; Tomoyuki Naito; Hiroyuki Fujshiro; Milos Jirsa; Akira Murakami; Jacques Noudem

doi:10.1016/j.mseb.2021.115390

Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB₂

Muralidhar Miryala, Sai Srikanth Arvapalli, Naomichi Sakai, Masato Murakami, Hidehiko Mochizuki, Tomoyuki Naito, Hiroyuki Fujshiro, Milos Jirsa, Akira Murakami, Jacques Noudem

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

High-density MgB₂ bulks with superior mechanical and superconducting properties were fabricated using spark plasma sintering (SPS). The sharp superconducting transition at 37.5 K proved high quality of the superconductors. Critical current density significantly exceeded that of conventionally sintered bulks. Flux pinning diagrams indicated dominance of grain boundary pinning, with peak position at 0.2. SPS bulks showed improved mechanical properties with 8-times higher bending strength compared to dense hot isostatic pressed bulks. Trapped field was measured at 14 K and 20 K, 1 mm above the bulk's surface, with applied pulse field up to 2 T. A local overheating together with a complex trapped field formation in the MgB₂ bulks during pulse-field magnetization were studied to elucidate limitations of Pulse Field Magnetization.

Original language	English
Article number	115390
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	273
DOIs	https://doi.org/10.1016/j.mseb.2021.115390
Publication status	Published - 2021 Nov

Keywords

Critical current density
Mechanical properties
MgB2
Pulse field magnetization
Spark plasma sintering

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.mseb.2021.115390

Cite this

Miryala, M., Arvapalli, S. S., Sakai, N., Murakami, M., Mochizuki, H., Naito, T., Fujshiro, H., Jirsa, M., Murakami, A., & Noudem, J. (2021). Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB₂. Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 273, [115390]. https://doi.org/10.1016/j.mseb.2021.115390

Miryala, M, Arvapalli, SS, Sakai, N, Murakami, M, Mochizuki, H, Naito, T, Fujshiro, H, Jirsa, M, Murakami, A & Noudem, J 2021, 'Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB₂', Materials Science and Engineering B: Solid-State Materials for Advanced Technology, vol. 273, 115390. https://doi.org/10.1016/j.mseb.2021.115390

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abstract = "High-density MgB2 bulks with superior mechanical and superconducting properties were fabricated using spark plasma sintering (SPS). The sharp superconducting transition at 37.5 K proved high quality of the superconductors. Critical current density significantly exceeded that of conventionally sintered bulks. Flux pinning diagrams indicated dominance of grain boundary pinning, with peak position at 0.2. SPS bulks showed improved mechanical properties with 8-times higher bending strength compared to dense hot isostatic pressed bulks. Trapped field was measured at 14 K and 20 K, 1 mm above the bulk's surface, with applied pulse field up to 2 T. A local overheating together with a complex trapped field formation in the MgB2 bulks during pulse-field magnetization were studied to elucidate limitations of Pulse Field Magnetization.",

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author = "Muralidhar Miryala and Arvapalli, {Sai Srikanth} and Naomichi Sakai and Masato Murakami and Hidehiko Mochizuki and Tomoyuki Naito and Hiroyuki Fujshiro and Milos Jirsa and Akira Murakami and Jacques Noudem",

note = "Funding Information: This work was partly supported by Shibaura Institute of Technology (SIT) International Research Center for Green Electronics and Grant-in-Aid FD research budget code: 721MA56383. One of the authors (SSA) acknowledges support from SIT for his post-doctoral fellowship. Publisher Copyright: {\textcopyright} 2021 The Authors",

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AU - Naito, Tomoyuki

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AU - Jirsa, Milos

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AU - Noudem, Jacques

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N2 - High-density MgB2 bulks with superior mechanical and superconducting properties were fabricated using spark plasma sintering (SPS). The sharp superconducting transition at 37.5 K proved high quality of the superconductors. Critical current density significantly exceeded that of conventionally sintered bulks. Flux pinning diagrams indicated dominance of grain boundary pinning, with peak position at 0.2. SPS bulks showed improved mechanical properties with 8-times higher bending strength compared to dense hot isostatic pressed bulks. Trapped field was measured at 14 K and 20 K, 1 mm above the bulk's surface, with applied pulse field up to 2 T. A local overheating together with a complex trapped field formation in the MgB2 bulks during pulse-field magnetization were studied to elucidate limitations of Pulse Field Magnetization.

AB - High-density MgB2 bulks with superior mechanical and superconducting properties were fabricated using spark plasma sintering (SPS). The sharp superconducting transition at 37.5 K proved high quality of the superconductors. Critical current density significantly exceeded that of conventionally sintered bulks. Flux pinning diagrams indicated dominance of grain boundary pinning, with peak position at 0.2. SPS bulks showed improved mechanical properties with 8-times higher bending strength compared to dense hot isostatic pressed bulks. Trapped field was measured at 14 K and 20 K, 1 mm above the bulk's surface, with applied pulse field up to 2 T. A local overheating together with a complex trapped field formation in the MgB2 bulks during pulse-field magnetization were studied to elucidate limitations of Pulse Field Magnetization.

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