Title :
The effect of neutron irradiation on Nd-Fe-B and Sm2Co17-based high-temperature magnets
Author :
Chen, C.H. ; Talnagi, J. ; Liu, J. ; Vora, P. ; Higgins, A. ; Liu, S.
Author_Institution :
Dayton Univ., OH, USA
Abstract :
Results from the neutron irradiation experiments show that the radiation tolerance is very high for Sm2Co17-type magnets and is fairly low for Nd-Fe-B-type magnets. The analyses show that the major radiation damage in permanent magnets is caused by a radiation-induced thermal spike accompanied by a localized temperature TL, and the radiation tolerance of a magnet is determined mainly by its thermal stability. The TL value depends on the radiation intensity and the magnet composition. The thermal stability of a magnet at temperature below its Curie temperature is related to its intrinsic coercivity Hci and its shape.
Keywords :
Curie temperature; coercive force; ferromagnetic materials; iron alloys; permanent magnets; radiation effects; thermal stability; Curie temperature; Sm2Co17; high-temperature magnets; intrinsic coercivity; localized temperature; magnet composition; neutron irradiation; permanent magnets; radiation damage; radiation intensity; radiation tolerance; thermal spike; thermal stability; Coercive force; Inductors; Iron; Neodymium; Neutrons; Permanent magnets; Radiation effects; Samarium; Temperature; USA Councils; Localized temperature; permanent magnets; radiation effects; radiation tolerance; thermal spike;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854985
