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

研究成果: Article査読

抄録

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.

本文言語English
論文番号115390
ジャーナルMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
273
DOI
出版ステータスPublished - 2021 11

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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