Phase and microstructure of TbCu7-type SmFe melt-spun powders
来源期刊：Journal of Rare Earths2013年第4期
论文作者：罗阳 于敦波 李红卫 庄卫东 李扩社 吕彬彬
文章页码：381 - 385
摘 要：The SmxZr0.3Fe9.1-xCo0.6（x=0.8,0.9,1.0） powders were prepared by melt-spun method with different quenching velocities.The phase and microstructure were studied by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The Th2Zn17-type structure of the as-cast state changed to TbCu7-type after quenching to a rotating molybdenum roll under certain velocity,and the formation of TbCu7-type phase was strictly depending on the Sm content and roll speed.The SEM morphology showed that the Fe-rich zone was typically fish-bone structure and TEM diffraction pattern indicated the nano-scale crystal size with TbCu7-structure when x=0.9,and FCC type γ-Fe on the basis of α-Fe formed in the non-equilibrium solidification could be detected by selected area electron diffraction（SAED） indexing in the x=0.8 samples.
罗阳，于敦波，李红卫，庄卫东，李扩社，吕彬彬
National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,Grirem Advanced Materials Co.,Ltd.
摘 要：The SmxZr0.3Fe9.1-xCo0.6（x=0.8,0.9,1.0） powders were prepared by melt-spun method with different quenching velocities.The phase and microstructure were studied by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The Th2Zn17-type structure of the as-cast state changed to TbCu7-type after quenching to a rotating molybdenum roll under certain velocity,and the formation of TbCu7-type phase was strictly depending on the Sm content and roll speed.The SEM morphology showed that the Fe-rich zone was typically fish-bone structure and TEM diffraction pattern indicated the nano-scale crystal size with TbCu7-structure when x=0.9,and FCC type γ-Fe on the basis of α-Fe formed in the non-equilibrium solidification could be detected by selected area electron diffraction（SAED） indexing in the x=0.8 samples.
关键词：
