The microstructural changes of Nd-rich interface phases during postsintering annealing were investigated. A mixture of very fine (about 2–3 nm) crystallites of hexagonal [formula omitted], cubic [formula omitted] [formula omitted], and amorphous phases were observed at the interface phase in the as-sintered magnet and after the first postsintering annealing process. The transformation from [formula omitted] to [formula omitted] occurred during the second postsintering annealing process, and the resulting [formula omitted] has the proper crystallographic relation with the main phase. The reduced lattice mismatch between the (110) plane of [formula omitted] interface phase and the (001) or (100) plane of Nd–Fe–B main phase after the second postsintering annealing process is the primary reason for the enhancement in the magnetic properties.
|Number of pages||1|
|Journal||Journal of Applied Physics|
|Publication status||Published - 2010 May 1|
ASJC Scopus subject areas
- Physics and Astronomy(all)