Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB2

High-density MgB2 bulks with superior mechanical and superconducting properties were fabricated using spark plasma sintering (SPS). The sharp transition at 37.5 K proved high quality of the superconductors. Critical current density significantly exceeded that conventionally sintered bulks. Flux pinning diagrams indicated dominance grain boundary pinning, peak position 0.2. SPS showed improved 8-times higher bending strength compared to dense hot isostatic pressed Trapped field was measured 14 20 K, 1 mm above bulk’s surface, applied pulse up 2 T. A local overheating together a complex trapped formation in during pulse-field magnetization studied elucidate limitations Pulse Field Magnetization.