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纳米晶复合永磁合金的磁滞行为与组织结构

HYSTERESIS BEHAVIOR AND MICROSTRUCTURE OF NANOCOMPOSITE PERMANENT MAGNETIC ALLOYS

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【作者】 张敏刚金志浩郭东城周俊琪

【Author】 ZHANG Min’gang, JIN Zhihao (State Key Laboratory for Mechanical Behaviour of Materials, Xi’an Jiaotong University, Xi’an 710049) GUO Dongcheng, ZHOU Junqi (Materials Engineering Department, Taiyuan Heavy Machinery Institute)

【机构】 西安交通大学金属材料强度国家重点实验室太原重型机械学院

【摘要】 研究了经过不同热处理的NdFeB系纳米晶复合永磁合金的磁滞行为,根据磁滞回线一阶导数 曲线dM/dH~H分析了双相磁体磁滞回线M~H的变化情况,采用XRD和TEM对各典型回线 对应的样品组织结构进行了观测分析,在欠时效和过时效条件下,dM/dH~H曲线均出现双峰,但对 应不同的显微组织和不同的机制.在峰值时效条件下,合金由2:14:1和α-Fe双相组成,dM/dH~H 曲线由单峰组成,磁滞回线表现为单相磁体的磁滞行为。

【Abstract】 Hysteresis behavior of nanocomposite NdFeB magnet under different annealing treatment was investigated. The characteristic change of typical M - H hysteresis loops was analyzed using dM/dH - H curves. The microstructures of samples corresponding to typical hysteresis loops were studied by TEM and XRD method. Two peaks appear in dM/dH - H curves of samples under both underage and postage treatment, but with different microstructure and mechanism. There is only one peak in the dM/dH - H curve under peak-aging treatment, the hysteresis loop of sample consisted of 2:14:1 and α-Fe phases has characteristic of smooth single-phase type demagnetization curve.

【基金】 山西省青年科学基金资助项目! 971020.
  • 【文献出处】 材料研究学报 ,Chinese Journal of Material Research , 编辑部邮箱 ,2000年06期
  • 【分类号】TG13
  • 【被引频次】8
  • 【下载频次】82
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