Investigation of MgB2 bulk superconductors synthesized by in situ spark plasma sintering at different temperatures


Ağıl H., Agil A. A., GÜNER S. B., Ayas E.

Materials Chemistry and Physics, vol.306, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 306
  • Publication Date: 2023
  • Doi Number: 10.1016/j.matchemphys.2023.128010
  • Journal Name: Materials Chemistry and Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Critical current density, Densification, Levitation force, MgB2, Spark plasma sintering
  • Recep Tayyip Erdoğan University Affiliated: Yes

Abstract

In this research, the synthesis of MgB2 bulk superconductor with in-situ spark plasma sintering technique at different temperatures and the impacts of these sintering temperatures on the critical parameters (density, phase development, microstructure, transition temperature, critical current density and levitation force) of the superconductor were investigated. The optimum sintering temperature in terms of phase formation was found to be 850 °C. The maximum density was reached at 900 °C. It was determined that the critical temperatures of the samples sintered at 850 and 900 °C were around 39 K. It was found that the materials processed at different temperatures by in situ spark plasma sintering carry critical current densities of the order of 105 A/cm2 in the self-field and at 10 and 20 K. The maximum attractive and repulsive force are visible that there is not a linear relation with the sintering temperatures of samples.