摘要
The SmxZr0.3Fe9.1-xCoo.6 （x=0.8, 0.9, 1.D） 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 elec- tron microscopy （TEM）. The Th2Zn17-type structure of the as-cast state changed to TbCuv-type after quenching to a rotating molyb- denum roll under certain velocity, and the formation of TbCuT-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 TbCuT-structure when x=0.9, and FCC type 7-Fe on the basis of ct-Fe formed in the non-equilibrium so- lidification could be detected by selected area electron diffraction （SAED） indexing in the x=0.8 samples.
The SmxZr0.3Fe9.1-xCoo.6 （x=0.8, 0.9, 1.D） 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 elec- tron microscopy （TEM）. The Th2Zn17-type structure of the as-cast state changed to TbCuv-type after quenching to a rotating molyb- denum roll under certain velocity, and the formation of TbCuT-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 TbCuT-structure when x=0.9, and FCC type 7-Fe on the basis of ct-Fe formed in the non-equilibrium so- lidification could be detected by selected area electron diffraction （SAED） indexing in the x=0.8 samples.
基金
supported by the National High Technology Research and Development Program of China (863 Program) (2011AA03A402)
the International Scientific and Technological Cooperation Projects (2010DFB53520)
