采用放电等离子烧结技术制备了Tb Fe Co/Ti复合梯度磁光靶材。利用扫描电子显微镜和电子能谱对材料的显微组织形貌及化学成分进行了观察和分析。结果表明 ,这种Tb Fe Co/Ti复合梯度靶材具有宏观组织不均匀性和微观组织连续性的特征。各...采用放电等离子烧结技术制备了Tb Fe Co/Ti复合梯度磁光靶材。利用扫描电子显微镜和电子能谱对材料的显微组织形貌及化学成分进行了观察和分析。结果表明 ,这种Tb Fe Co/Ti复合梯度靶材具有宏观组织不均匀性和微观组织连续性的特征。各梯度层之间的原子扩散现象不明显。层间界面结合良好 ,不存在微裂纹 ,从而具有较好的力学性能。展开更多
Highly ordered Tb_(x)Fe_(7)Co_(3)(x=0,0.6,0.8)nanowires were synthesized in alumina templates by electrochemical deposition method.Here,the effects of Tb content and annealing treatment on the phase composition,morpho...Highly ordered Tb_(x)Fe_(7)Co_(3)(x=0,0.6,0.8)nanowires were synthesized in alumina templates by electrochemical deposition method.Here,the effects of Tb content and annealing treatment on the phase composition,morphology,crystalline structure and magnetic properties were investigated.The asdeposited Tb_0 Fe_(7)Co_(3)nanowires comprise Fe_(7)Co_(3)phase.While after adding Tb,the diffraction peaks slightly shift left,indicating the infiltration of Tb atoms into Fe_(7)Co_(3)phase.After annealing,Tb_0 Fe_(7)Co_(3)nanowires still consist of Fe_(7)Co_(3)phase with a slight enhancement on coercivity.While the annealed nanowires with Tb doped present a complex phase composition containing Fe3 Tb,Fe_(2)Tb,Co_(3)Tb,Co_(17)Tb_(2),TbFeO_(3)and Fe_(2)O_(3)phases distribute in the central portion,and Co_(0.72)Fe_(0.28)at the nanowire outer walls.The annealed Tb_(x)Fe_(7)Co_(3)(x=0.6,0.8)nanowires show higher magnetic performance owing to the formation of hard magnetic phases,the interfacial elastic coupling between hard and soft phases and the coherent Fe3 Tb/Co_(3)Tb interface which restrain the domain wall motion.To be specific,the coercivity and remanence ratio of TbxFe_(7)Co_(3)(x=0.6,0.8)nanowires significantly enhance with increasing Tb content.展开更多
文摘采用放电等离子烧结技术制备了Tb Fe Co/Ti复合梯度磁光靶材。利用扫描电子显微镜和电子能谱对材料的显微组织形貌及化学成分进行了观察和分析。结果表明 ,这种Tb Fe Co/Ti复合梯度靶材具有宏观组织不均匀性和微观组织连续性的特征。各梯度层之间的原子扩散现象不明显。层间界面结合良好 ,不存在微裂纹 ,从而具有较好的力学性能。
基金Project supported by National Natural Science Foundation of China(51271070,51871087)the Natural Science Foundation of Hebei Province(E2016202406)。
文摘Highly ordered Tb_(x)Fe_(7)Co_(3)(x=0,0.6,0.8)nanowires were synthesized in alumina templates by electrochemical deposition method.Here,the effects of Tb content and annealing treatment on the phase composition,morphology,crystalline structure and magnetic properties were investigated.The asdeposited Tb_0 Fe_(7)Co_(3)nanowires comprise Fe_(7)Co_(3)phase.While after adding Tb,the diffraction peaks slightly shift left,indicating the infiltration of Tb atoms into Fe_(7)Co_(3)phase.After annealing,Tb_0 Fe_(7)Co_(3)nanowires still consist of Fe_(7)Co_(3)phase with a slight enhancement on coercivity.While the annealed nanowires with Tb doped present a complex phase composition containing Fe3 Tb,Fe_(2)Tb,Co_(3)Tb,Co_(17)Tb_(2),TbFeO_(3)and Fe_(2)O_(3)phases distribute in the central portion,and Co_(0.72)Fe_(0.28)at the nanowire outer walls.The annealed Tb_(x)Fe_(7)Co_(3)(x=0.6,0.8)nanowires show higher magnetic performance owing to the formation of hard magnetic phases,the interfacial elastic coupling between hard and soft phases and the coherent Fe3 Tb/Co_(3)Tb interface which restrain the domain wall motion.To be specific,the coercivity and remanence ratio of TbxFe_(7)Co_(3)(x=0.6,0.8)nanowires significantly enhance with increasing Tb content.
