In situ TEM observation of Zn diffusion into hexagonal Sm-Zr-Fe-Co-N using a heating holder.
In situ TEM observation of Zn diffusion into hexagonal Sm-Zr-Fe-Co-N using a heating holder.
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使用加热支架原位 TEM 观察 Zn 扩散到六方 Sm-Zr-Fe-Co-N 中的情况。
DOI：
10.1016/j.matlet.2022.132394
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Takahashi;C. Hosokawa;H.
在Sm-Fe-N合金中，Zn元素存在于晶界处，具有较高的磁导率。大多数关于这类合金的研究仅集中在菱方晶体Sm-Fe-N粉末中的Zn。Zn在Sm-Fe-N六方多晶粉末中的行为尚未被研究者表征，更不用说加热过程中Zn向Sm-Fe-N多晶粉末中的动态扩散。在这里，我们直接可视化Zn扩散到六方多晶Sm-Zr-Fe-Co-N使用透射电子显微镜配备了加热保持器。在加热过程中，Sm-Zr-Fe-Co-N合金表面的Zn随着晶界的变化而消失，表明Zn优先扩散到晶界形成Fe 3 Zn 10相。该技术可用于阐明特定环境下的合成反应，从而优化材料合成技术。
Sm-Fe-N alloy with Zn at the grain boundaries has high magnetic coercivity. Most studies on this type of alloy have focused only on Zn in rhombohedral crystal Sm-Fe-N powders. The behavior of Zn in hexagonal polycrystalline Sm-Fe-N powders has not been characterized by researchers, much less the dynamic diffusion of Zn into polycrystalline Sm-Fe-N during heating. Here, we directly visualized Zn diffusion into hexagonal polycrystalline Sm-Zr-Fe-Co-N using a transmission electron microscope equipped with a heating holder. Zn on the surface of Sm-Zr-Fe-Co-N disappeared with subsequent changes in the grain boundaries during heating, indicating that Zn preferentially diffused into the grain boundary to form the Fe3Zn10phase. This technique can be useful to elucidate synthesis reactions under specific environments, leading to optimization of the material synthesis technique.