Abstract
Containerless solidification of the wide area Nd2Fe14B primary phase composition samples were carried out using a melt-droplet melting and solidification apparatus. The undercooling solidification, nucleation behavior of Nd2Fe14B phase crystallization and mono-variant eutectic reaction for boundary phase formation were measured by a high-speed type optical temperature system. Consequently, homogeneous and fine particle microstructure formation of main phase in Nd-Fe-B magnetic materials and c axis orientation of Nd2Fe14B phase were obtained in Nd20Fe72B8 undercooled dropt-like sample by the effect of the Cu chill cooling and high temperature compression. The above result thinks an extremely effective new process for the magnetic anisotropy improvement of NdFeB system permanent magnet material.
