【作者】 赵书文； 宇宵； 徐学文； 孟祥熙； 刘何燕； 李养贤；

【Author】 Zhao Shuwen, Yu Xiao, Xu Xuewen, Meng Xiangxi, Liu Heyan, Li Yangxian(School of Material Science & Engineering, Hebei University of Technology , Tianjin 300130, China)

【机构】 河北工业大学材料科学与工程学院；

【摘要】 尝试了一种用低熔点金属锡粘结TbDyFe的方法。将TbDyFe合金粉与Sn粉混合均匀,压制成型后在快速热处理设备中高纯氩气保护下加热,使金属锡充分融化起到粘结剂的作用。试图利用Sn良好的延展性和抗氧化性来改善ThDyFe粘结样品的机械性能和抗氧化性。分别研究了Sn含量、成型压力、加热工艺参数对磁致伸缩性能和机械性能的影响。最终获得了950 kA·m-1磁场下平行方向磁致伸缩值为546 ppm的粘结样品,其制备条件为:粉末粒径<75μm,Sn含量为8:100,成型压力为1．0 GPa,升温至250℃后保温150 s。所有样品都表现出良好的抗氧化性,其硬脆性也得到了明显改善。更多还原

【Abstract】 Metal bonding method with Sn was exploit- ed to fabricate TbDyFe composites. TbDyFe powders were mixed with various amounts of Sn powders, and compacted at different pressure. The compacts were then heated in the rapid thermal processor (RTP) in Ar atmosphere for several minutes, and the molten Sn severed as binder. We try to introduce the ductile Sn into the brittle magnetostrictive REFe2 Laves phase to improve the mechanical properties and the oxidation resistance. The influences of Sn content, compaction pressure, and heating technique on magnetostrictive and mechanical properties were investigated. The magnetostriction (λ// ) of 546 ppm at 950 kA·m-1 is obtained for the composite fabricated at the following conditions: a powder size < 75 μm, a Sn content of 8: 100, a compaction pressure of 1.0 GPa, and heated at 250℃ for 150 s in the rapid thermal processor. All the composites fabricated by this means possess higher oxidation resistance and the hard brittleness improves.更多还原