Coercivity of Hot-pressed Compacts of Nd-Fe-B-type HDDR-treated Powder
作者： Md. Abdul Matin , Hae-Woong Kwon , Jung-Goo Lee , Ji-Hun Yu
DOI: 10.4283/JMAG.2014.19.2.106
关键词:
摘要: Nd 12.5 Fe 80.6 B 6.4 Ga 0.3 Nb 0.2 HDDR-treated powder was compacted by hot-pressing using different configurations of dies and heating rates. The die were especially in terms the evacuation system that used for hot-pressing. coercivity compacts influenced rate. In spite identical temperature rate, radically reduced above 600 °C prepared closed-type compared to open-type die. decreased with increasing rate value further increased when extreme high employed. contained a significant amount residual hydrogen (approx. 1500 ppm) form 2 14 BHx hydride. dramatic decrease compact closed is attributed disproportionation High mainly due effective desorption or suppression hydrogen-related upon
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