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 journalArticlepeer-review

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 languageEnglish
Article number115390
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume273
DOIs
Publication statusPublished - 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

Fingerprint

Dive into the research topics of 'Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB<sub>2</sub>'. Together they form a unique fingerprint.

Cite this