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首页> 外文期刊>Materials science forum >Study on the Magnetic Properties and Microstructure of Single-stage Hot-deformed Nd-Fe-B Magnets
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Study on the Magnetic Properties and Microstructure of Single-stage Hot-deformed Nd-Fe-B Magnets

机译：单级热变形Nd-Fe-B磁体的磁性能和微观结构研究

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摘要

The Nd-Fe-B powder was prepared to bulk by cold pressing, and then was hot-deformed by the vacuum hot-pressing machine. Effects of hot-deformation temperature and rate on the density, anisotropy, performance and microstructure were studied. The results showed that the grain size was small, but the density and orientation degree was low, thus leading to poor performance when the deformation temperature was too low or deformation rate was too large. When the temperature was higher than 750 ℃ or the rate was lower than 0.1 mm/s, the anisotropic magnets with good density and texture could be obtained. However, the magnetic properties of hot-deformed magnets deteriorated due to the present of coarse grains. From the microstructure of hot-deformed magnets it could be seen that there were plenty of coarse and irregular grains, which have a higher Nd content than the plate-like grains. The optimum magnetic properties could be obtained at deformation temperature of 700 ℃ and rate of 0.1 mm/s.
机译：通过冷压将Nd-Fe-B粉末制备成块状，然后通过真空热压机将其热变形。研究了热变形温度和速率对密度，各向异性，性能和微观结构的影响。结果表明，晶粒尺寸小，但密度和取向度低，因此当变形温度太低或变形率太大时，导致性能差。当温度高于750℃或速率低于0.1 mm / s时，可以获得具有良好密度和织构的各向异性磁体。然而，由于存在粗大晶粒，热变形磁体的磁性能下降。从热变形磁体的微观结构可以看出，存在大量的粗大和不规则的晶粒，其Nd含量高于板状晶粒。在700℃的变形温度和0.1 mm / s的速率下可以获得最佳的磁性。

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  • 来源
    《Materials science forum》 |2015年第2015期|281-286|共6页
  • 作者

    Yilong Ma; Qian Shen; Anruo Zhou; Jianchun Sun; Chunhong Li; Dengming Chen;

  • 作者单位

    College of Metallurgical and Materials Engineering, Chongqing University of Science and technology, Chongqing 401331, China;

    College of Material Science and Engineering, Chongqing University of technology, Chongqing 400054, China;

    College of Metallurgical and Materials Engineering, Chongqing University of Science and technology, Chongqing 401331, China;

    College of Metallurgical and Materials Engineering, Chongqing University of Science and technology, Chongqing 401331, China;

    College of Metallurgical and Materials Engineering, Chongqing University of Science and technology, Chongqing 401331, China;

    College of Metallurgical and Materials Engineering, Chongqing University of Science and technology, Chongqing 401331, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nd-Fe-B; Single-stage hot-deformation; Magnetic properties; Microstructure;

    机译：钕铁硼单级热变形;磁性能;微观结构;

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