Magnetic Levitation Performance of Superconducting Silver-Added MgB2 Bulks Obtained by In Situ Spark Plasma Sintering

GÜNER S. B., Badica P., Miryala M.

ADVANCED ENGINEERING MATERIALS, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1002/adem.202501616
  • Dergi Adı: ADVANCED ENGINEERING MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

Bulk MgB2 disks (20 mm in diameter and 3.8 mm in thickness) added with 0, 1.5, 3.0, 4.5, 6.0, and 9.0 wt% silver are obtained by in situ spark plasma sintering. Samples are characterized by structural, microstructural, magnetic, and magnetic levitation zero-field-cooling and field-cooling measurements. Superconducting transitions are sharp with critical temperatures being in the range of 36.5-37.9 K. The vertical (F z,ZFC) and lateral (F x) levitation force show maximum values for samples added with 1.5 or 3 wt Ag%. At 20 K they are +17.78 N and 6.37 N, respectively. A maximum for zero field critical current density and pinning force is found for the sample added with 3 wt%. Roughly, as expected, levitation force correlates with zero-field critical current density, but other details influence this dependance. Results indicate that silver is an effective addition to MgB2 for enhancement of levitation performance.