Amorphous-crystalline state transformation induced by annealing in R2Fe14B (R = Nd, Er) compounds

作者：Chukalkin Yu G; Teplykh A E; Kudrevatykh N V; Choo K N; Lee S; Andreev A V^*; Pirogov A N

来源：Journal of Alloys and Compounds, 2014, 615: 75-78.

DOI：10.1016/j.jallcom.2014.06.105

• Permanent magnets
• Amorphous state
• Neutron powder diffraction
• Isothermal annealing

Magnetization and neutron diffraction measurements have been carried out to study evolution of structure and magnetic states of amorphous Nd2Fe14B and Er2Fe14B alloys under isothermal annealing at 295-1025 K. The amorphization have been performed by neutron irradiation which provides a homogeneous state in different with other methods of amorphization. The annealing induces a rise of alpha-Fe phase content in alloys and a recrystallization into Nd2Fe14B-type phase. Neutron diffraction data show that the reaystallization occurs over narrow temperature interval (590-638) K in Er2Fe14B and at around 800 K in Nd2Fe14B. Magnetic measurements testify that in both samples the magnetization and coercive field increase with annealing temperature above 800 K.

• 出版日期2014-12-5