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在低压和低温度下烧结 (Nd,Pr,Gd) -Fe-B磁铁中固体HDDR工艺的特点

Renhui Liu^1,2, Ihor I Bulyk^1,2, Munan Yang^1,2,3

¹Jiangxi Province Key Laboratory of Magnetic Metallic Materials and Devices, Jiangxi University of Science and Technology, Ganzhou 341000, China.

Materials (Basel, Switzerland)

|September 13, 2025

概括

这项研究探讨了化,不成比例,吸附和重组 (HDDR) 过程参数如何影响 (Nd,Pr,Gd) -Fe-B磁铁. 在HDDR处理过程中降低压 (10kPa) 会增强磁性异构性 (DoT).

科学领域:

材料科学材料科学材料科学
固态化学固态化学
磁力学磁力学是一种

背景情况:

烧结 (Nd,Pr,Gd) -Fe-B磁铁对于永久磁铁应用至关重要.
优化化,不成比例,溶解和重组 (HDDR) 过程是提高其磁性特性的关键.
了解HDDR参数,相组合和纹理度 (DoT) 之间的关系对于材料开发至关重要.

研究的目的:

调查HDDR工艺参数对烧结 (Nd,Pr,Gd) -Fe-B磁体相组成和纹理度 (DoT) 的影响.
确定最大限度地提高这些磁铁的异性质性质的最佳条件.
分析气压力,温度和反应时间对HDDR工艺和由此产生的磁性特征的影响.

主要方法:

在这项研究中,在烧结 (Nd,Pr,Gd) -Fe-B磁铁上使用了HDDR工艺.
化 (HD) 在10-50kPa的压力和700-785°C的温度下进行了3-11小时.
在750-850°C之间的温度下,进行了溶解和再组合 (DR) 步骤.

主要成果:

在所有测试的气压力和温度下,HD反应发生.
不成比例产品的相组合因样本深度而异.
在10kPa的气压力下应用HDDR显著增加了纹理度 (DoT),表明增强的异构性.
观察到DoT随着气压力的增加而下降的一般趋势.
重组阶段在样本中表现出异构性质,特别是在50kPa时,而在表面附近则是异构性质.

结论:

HDDR过程参数,特别是气压力,对 (Nd,Pr,Gd) -Fe-B磁铁的相组合和DoT产生重大影响.
在HDDR过程中,较低的压 (大约10kPa) 有效地实现高异构性 (DoT).
不成比例和重组温度之间的相互作用,以及压力依赖的深度效应,决定了最终的磁纹.

关键词:

阶段组合组成阶段组合再组合的复合方式.烧结磁铁的烧结磁铁可以使用.一个坚实的不成比例.质地质地质地

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