在不同速率的热压缩后,磁域及其功率光谱密度在非定向电气钢中
Yuqi Wang1,2, Zhenyu Gao1, Li Luo1
1Angang Steel Co., Ltd., Anshan 114021, China.
Materials (Basel, Switzerland)
|August 12, 2023
概括
热压缩使电钢中的磁域变形,改变了磁性. 原子力显微镜揭示了域碎片化和重建,影响了材料的行为.
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
- 磁力学 磁力学 是一种
背景情况:
- 非定向电气钢对于磁性应用至关重要.
- 了解热压缩对磁域的影响对于材料性能至关重要.
- 之前的研究已经探讨了变形效应,但详细的磁域反应需要进一步研究.
研究的目的:
- 为了研究未定向电气钢的微结构和磁性反应,这些电气钢受到累积热压缩.
- 分析变形,磁域形态学和磁性特性之间的关系.
- 改进磁力显微镜 (MFM) 技术,用于准确的域分析.
主要方法:
- 使用Gleeble 3500热系统进行受控的热压缩.
- 采用原子力显微镜 (AFM) 和磁力显微镜 (MFM) 来观察磁域.
- 测量的组件力,功率光谱密度 (PSD) 曲线和歇斯底里曲线.
- 开发了一种改进的MFM扫描模式,以最大限度地减少探头引起的干扰.
主要成果:
- 观察到磁域被压缩成碎片形状和重建的微观结构,类似于变形和动态再结晶的粒.
- 证明MFM探测器可以变形近接磁域,转移峰值位置.
- 在PSD曲线中确定了与域变形相关的统计脉.
- 发现高速累积压缩将磁域粉碎成较小,不规则形状的实体,边界模糊.
结论:
- 建立了变形,磁域结构和电钢中的磁性特性之间的全面联系.
- 突出了热压缩对磁域行为的显著影响.
- 为更准确的磁域表征提供了优化的MFM扫描方法.
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