Hot isostatic pressing of powder in tube MgB2 wires

• DOI: 10.1063/1.1571231
• Publication Date: 2003-04-25T12:23:42Z
• Authors: A. Serquis; L. Civale; D. L. Hammon; X. Z. Liao; J. Y. Coulter; Y. T. Zhu; M. Jaime; D. E. Peterson; F. M. Mueller; V. F. Nesterenko; Y. Gu
• Keywords: Hot isostatic pressing

The critical current density (Jc) of hot isostatic pressed (HIPed) MgB2 wires, measured by d.c. transport and magnetization, is compared with that similar wires annealed at ambient pressure. HIPed have a higher Jc than the especially high temperatures magnetic fields, irreversibility field (Hirr). are promising for applications, Jc>106 A/cm2 5 K zero >104 1.5 T 26.5 K, Hirr ~ 17 4 K. improvement attributed to structural defects, which likely source vortex pinning. These observed transmission electron microscopy, include small angle twisting, tilting, bending boundaries, resulting in formation sub-grains within crystallites.