Residual Hydrogen in Nd-Fe-B HDDR Powder and Its Effect on Coercivity of Hot-Pressed Compact
作者： Md. Abdul Matin , Hae-Woong Kwon , Jung-Goo Lee , Ji-Hun Yu , Tae Hoon Kim
DOI: 10.1109/TMAG.2013.2243118
关键词:
摘要: Residual hydrogen in the HDDR-treated Nd12.5Fe80.6B6.4Ga0.3Nb0.2 powder and its effect on coercivity of consolidated compact were investigated. Hydrogen desorption HDDR was studied by vacuum gauge TPA. Compaction performed hot-pressing technique. The contained significant amount residual (approximately 1520 ppm). Coercivity hot-pressed radically reduced when compaction at temperature above 650 °C. radical reduction °C attributed to presence soft magnetic phases, α-Fe Fe2B formed via disproportionation Nd2Fe14BHx. may have contributed for formation
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