Magnetic property and microstructure of single crystalline Nd2Fe14B ultrafine particles ball milled from HDDR powders

作者：Li W F^*; Hu X C; Cui B Z; Yang J B; Han J Z; Hadjipanayis G C

来源：Journal of Magnetism and Magnetic Materials, 2013, 339: 71-74.

DOI：10.1016/j.jmmm.2013.02.044

• Permanent magnet
• Single crystalline particles
• Ball milling

In this work we report the microstructure and magnetic property of single crystalline Nd2Fe14B ultrafine particles ball milled from HDDR Nd-Fe-B alloys. The average size of the particles is 283 nm, and TEM observation reveals that these particles are single crystalline. The coercivity of these particles is 6.0 kOe, which is much higher than that of the particles ball milled from sintered and hot pressed Nd-Fe-B magnets. Micromagnetic analysis shows that the coercivity degradation is caused by surface damage during ball milling.

• 出版日期2013-8
• 单位北京大学