Chemical influences and challenges associated with enhanced Nb3Sn superconductor development

• DOI: 10.22533/at.ed.1532201093

• Palavras-chave: -

• Keywords: Nb3Sn(s), stoichiometry, superconducting properties, artificial pinning centers.

• Abstract:

  Nb3Sn(s) composites are the go-to superconductors for high magnetic field applications, however, the material is associated with immense difficulty around its manufacturing processes. Different approaches have been taken over the years in order to overcome engineering difficulties regarding superconducting wire production, with two methods being able to successfully provide strands with satisfactory properties, the so- called “Powder-In-Tube” and “Internal-Tin” processes, which utilize optimized heat treatments and stoichiometric composition, since chemical influences can shift the balance between superconducting properties such as critical current density (Jc), critical temperature (Tc) and upper critical field limit (Hc2), all of which act as functions of atomic Tin content (at.% Sn(s)). Since Nb3Sn(s) displays type II superconductor behavior, efforts that lead to increasements in Jc values are essential, distinctively by artificial pinning centers (APCs) addition by means of ternary insertions in order to promote greater density of flux pinning centers as deduced from current scientific consensus, however, further research is necessary to determine specific mechanics around pinning centers and grain boundary sizes.

   

• Número de páginas: 14