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在2:17型Sm-Co基磁铁中通过离子炼诱导的局部相分离

Xin Song¹, Yao Liu¹, Wentao Jia¹

¹Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.

Materials (Basel, Switzerland)

|June 28, 2023

概括

仔细的样本准备对于传输电子显微镜 (TEM) 的萨马- (Sm-Co) 磁铁至关重要. 不适当的离子削可以损坏纳米结构,导致高温应用的微结构分析不准确.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
磁力学磁力学是一种

背景情况:

2:17型的Sm-Co磁铁对于高温设备至关重要.
传输电子显微镜 (TEM) 对于分析它们的纳米结构至关重要.
离子削可以将文物引入TEM标本中.

研究的目的:

为了比较在不同离子磨条件下制备的Sm-Co磁铁的TEM标本中的微结构和微化学差异.
为了确定由低能离子削造成的特定结构损伤.
了解这些损坏对微观结构与财产关系研究的影响.

主要方法:

来自商业SmCo磁铁 (Sm13Gd12Co50Cu8.5Fe13Zr3.5重%) 的TEM标本的比较分析.
利用传输电子显微镜 (TEM) 和离子削技术.
在不同的磨削参数下研究了微观结构和微化学变化.

主要成果:

低能离子削优先损坏1:5H细胞边界,改变它们的结构从六角形到面中心立方形.
2:17R细胞阶段不受削过程的影响.
在受损细胞边界中的元素分布变得不连续,显示Sm/Gd和Fe/Co/Cu的分离.

结论:

为了避免人工缺陷,TEM样本的准备需要仔细控制.
离子削造成的结构损伤可能导致对Sm-Co磁铁微结构的误导性解释.
准确的TEM分析对于理解基于Sm-Co的磁铁的性能至关重要.

关键词:

在 Sm-Co 磁铁上这就是TEMEM.离子削磨削离子削阶段分离阶段分离的分离.

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