Artificial 2D Flux Pinning Centers in MgB2 Induced by Graphitic-Carbon Nitride Coated on Boron for Superconductor Applications
Source abstract
Abstract
Systemic investigation was carried out on the microstructure, superconducting properties, and flux pinning mechanism of MgB2 in situ fabricated with magnesium and g-C3N4 coated boron as precursors. The encapsulation of the boron powders with g-C3N4 was achieved by polycondensation of urea on boron powders. The g-C3N4 decomposes during the MgB2 fabrication to induce two-dimensional few-carbon layer, dispersed nanoparticles, and carbon-rich phases in the matrix to enhance the flux pinning force and Hirr of MgB2, which accounts for the in-field critical current density (Jc(H)) increase compared to the pure MgB2. The carbon layers acting as artificial two-dimensional flux pinning centers, have demonstrated high flux pinning efficiency to increase the Jc(H) of MgB2 superconductors.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Superconductivity in MgB2 and Alloys · Boron and Carbon Nanomaterials Research · Thermal Expansion and Ionic Conductivity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Materials/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444, China
School of Materials and Engineering, Shanghai University, Shanghai 200444, China
School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia
School of Civil & Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
Funding
Shanghai Municipal Education Commission · National Natural Science Foundation of China · Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University
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