添加的海斯勒Ni-Mn-In合金的结构和磁性特性
Dmitry Kuznetsov1, Elena Kuznetsova2, Alexey Mashirov1
1Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, 125009 Moscow, Russia.
Nanomaterials (Basel, Switzerland)
|October 15, 2025
概括
在Ni-Mn-In磁性形状记忆合金中对的兴奋剂显著影响了马氏体过渡温度. 这些合金在磁热冷却和MEMS技术中的应用方面表现有前途.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 金工业是金工业的一个方面.
背景情况:
- 磁形记忆合金,特别是海斯勒合金,表现出独特的磁结构过渡.
- 由于其可调节的特性,Ni-Mn-In系统以其在各种技术应用中的潜力而闻名.
研究的目的:
- 调查瓦纳兴奋剂对Ni51-xMn33.4In15.6Vx海斯勒合金晶体结构,马氏体转化和磁性特性的影响.
- 探索马氏体过渡温度对度和应用磁场的敏感性.
- 了解微观结构的演变和相位过渡的潜在应用.
主要方法:
- 磁性特性和超磁结构转换的实验研究.
- 分散电子散射分析. 分散电子散射分析.
- 传输电子显微镜 (TEM) 在加热和冷却期间进行现场实验.
- 高分辨率传输电子显微镜 (HRTEM).
主要成果:
- 马石过渡温度对兴奋剂和磁场非常敏感.
- 合金表现出L21类型的高温奥氏体相与纳米域结构 (tweed,反相域/边界).
- 微观结构由六层调制的马石 (观察到10M和14M) 组成,继承父相纳米域形态.
- 沿着奥氏体-马氏体边界观察到良好的连贯性.
结论:
- 的和快速火可以控制奥氏体相位结构和马氏体过渡温度.
- 观察到的微观结构特征和相位过渡行为使这些合金对磁热热冷却和MEMS有希望.
- 保持精细的接口结构对于合金性能至关重要.
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