Title :
Effect of Ag addition on the mechanical properties of bulk superconductors
Author :
Miyamoto, T. ; Katagiri, J. ; Nagashima, K. ; Murakami, M.
Author_Institution :
Supercond. Res. Lab., ISTEC, Tokyo, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
Bulk superconductors can function as quasi-permanents with generating magnetic fields much higher than those of conventional permanent magnets. However, a large electromagnetic force acts on such bulk superconductors, which sometimes leads to fracture. It is known that Ag addition is effective in improving the fracture toughness of bulk Y-Ba-Cu-O superconductors. Therefore, in this paper, we have studied the effects of Ag addition both on trapped field capability and mechanical properties of bulk RE-Ba-Cu-O (RE: Y, Sm) and have found that Ag addition is indeed effective in improving the mechanical properties of a large single-grain RE-Ba-Cu-O.
Keywords :
barium compounds; flux pinning; fracture toughness; high-temperature superconductors; permanent magnets; samarium compounds; silver; superconducting magnets; yttrium compounds; Ag addition effects; Sm-Ba-Cu-O; Y-Ba-Cu-O; bulk superconductors; electromagnetic force; fracture toughness; generating magnetic fields; mechanical properties; quasi-permanent magnets; quasi-permanents; trapped field capability; Electromagnetic forces; Fabrication; High temperature superconductors; Magnetic field measurement; Magnetic materials; Mechanical factors; Permanent magnets; Position measurement; Superconducting magnets; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
