中国物理B ›› 1997, Vol. 6 ›› Issue (11): 861-867.doi: 10.1088/1004-423X/6/11/008

• • 上一篇    

OPTIMUM DESCRIPTION FOR THE GRAIN ALIGNMENT IN PERMANENT MAGNETIC MATERIALS

高汝伟1, 张德恒1, 张建成1, 李华1, 王毅2, 孟宪洪2   

  1. (1)Department of Physics,Shandong University, Jinan 250100, China; (2)Shandong Metallurgical Research Institute,Jinan 250014,China
  • 收稿日期:1997-03-24 出版日期:1997-11-20 发布日期:1997-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China and the Natural Science Foundation of Shandong Province of China.

OPTIMUM DESCRIPTION FOR THE GRAIN ALIGNMENT IN PERMANENT MAGNETIC MATERIALS

GAO RU-WEI (高汝伟)a, ZHANG DE-HENG (张德恒)a, ZHANG JIAN-CHENG (张建成)a, LI HUA (李华)a, WANG YI (王毅)b, MENG XIAN-HONG (孟宪洪)b   

  1. a Department of Physics,Shandong University, Jinan 250100, China; b Shandong Metallurgical Research Institute,Jinan 250014,China
  • Received:1997-03-24 Online:1997-11-20 Published:1997-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China and the Natural Science Foundation of Shandong Province of China.

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摘要： Two types of Gaussian function for describing the grain a lignment in NdFeB permanent magnetic materials are introduced and compared in this paper. The results show that when the degree of grain alignment is avorable, the theoretical results based on the “θ-type”Gaussian function are in a greement with those based on the “tan θ-type”Gaussian function in the var iation tendency of the distribution coefficients and the distribution curves. When the degree of grain alignment is not good, the two descriptions have a large difference from each other. The theoretical results based on the “tan θ-type” Gaussian function are in good agreement with the experiments in the grain alignment dependence of the coercivity. However, the obtained results based on the “θ-type”Gaussian function are not in agreement with the experiments. The“tan θ-type”Gaussian function can be used to describe the grain alignment of various degrees and is consistent with the common Gaussian function taking x as a variable. So it is an optimum function for describing the grain alignment.

Abstract: Two types of Gaussian function for describing the grain a lignment in NdFeB permanent magnetic materials are introduced and compared in this paper. The results show that when the degree of grain alignment is avorable, the theoretical results based on the “$\theta$-type” Gaussian function are in a greement with those based on the “tan $\theta$-type”Gaussian function in the var iation tendency of the distribution coefficients and the distribution curves. When the degree of grain alignment is not good, the two descriptions have a large difference from each other. The theoretical results based on the “tan $\theta$-type” Gaussian function are in good agreement with the experiments in the grain alignment dependence of the coercivity. However, the obtained results based on the “$\theta$-type”Gaussian function are not in agreement with the experiments. The“tan $\theta$-type”Gaussian function can be used to describe the grain alignment of various degrees and is consistent with the common Gaussian function taking x as a variable. So it is an optimum function for describing the grain alignment.

中图分类号:  (Permanent magnets)

  • 75.50.Ww
75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 81.40.Ef (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)