Microstructure and Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Prepared by HDDR Combined with Mechanical Milling
Nd2Fe14B/α-Fe nanocomposite powders with a nominal composition of Nd12Fe82B6 were prepared by HDDR combined with mechanical milling. The microstructure of both the as-disproportionated and the subsequently desorption-recombination annealed alloy powders was studied by Mössbauer spectrometry and TEM. The magnetic properties were investigated by VSM using bonded magnet samples. The results showed that the annealing temperature had significant influence on both the recombination kinetics and the grain size of the Nd2Fe14B/α-Fe nanocomposite phases, and the bonded magnet samples presented the best magnetic properties when the nanocomposite powders were prepared by annealing at 760°C for 30 min.
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
L. X. Hu et al., "Microstructure and Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposite Prepared by HDDR Combined with Mechanical Milling", Materials Science Forum, Vols. 534-536, pp. 1349-1352, 2007