Observation of aging effect on two permanent magnet alloys by positron annihilation technique

Yunyu Wang; Nianqing Liu; Guodong Li

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Observation of aging effect on two permanent magnet alloys by positron annihilation technique

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- Observation of aging effect on two permanent magnet alloys by positron annihilation technique
- Nuclear Techniques Vol. 05, Issue 6, (1982)
- 作者机构：
  
  1.中国科学院高能物理研究所
  2.中国科学院物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1982-12
- 稿件说明：
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Yunyu Wang, Nianqing Liu, Guodong Li. Observation of aging effect on two permanent magnet alloys by positron annihilation technique[J]. Nuclear techniques, 1982, 05(6): 54-55.
DOI：

Yunyu Wang, Nianqing Liu, Guodong Li. Observation of aging effect on two permanent magnet alloys by positron annihilation technique[J]. Nuclear techniques, 1982, 05(6): 54-55. DOI：

摘要

本工作利用正电子湮灭方法研究了时效退火处理对两种磁性材料Fe-Cr-Co-Si和Sm

（Co、Fe、Cu、Zr）

微观结构的影响。Fe-Cr-Co-Si永磁合金具有机械加工性能好，最大磁能积高的优点，适于在需要加工的情况下应用

[1]

。Sm

（Co，Fe，Cu，Zr）

是一种性能十分优良的第二代稀土化合物的永磁材料。它的最大磁能积高达30兆高•奥

[2]

。这两种永磁材料经时效退火处理，磁性能（矫顽力和磁能积）明显提高。为了进一步提高磁性能和继续设计新的磁性材料，就需要深入探讨材料的宏观性能和微观结构之间的联系。这是当前磁性材料物理研究的一个显著的趋势。目前在研究这类问题的实验中，国外已经使用了核磁共振

[3]

、穆斯鲍尔效应

[4]

和μ介子自旋共振（μ

）等较新技术。最近李国栋

[5]

等用穆斯鲍尔效应的手段研究了Fe-Cr-Co-Si，认为经过磁场热处理和时效处理的样品在室温存在着顺磁相和铁磁相。但对Sm

（Co-Fe-Cu-Zr）

未能得到清晰的穆斯鲍尔谱。

Abstract

Positron annihilation technique is a new technique developed in recent years

it has become an efficient tool to study the point defects in metals and alloys. In this work the effect of aging-annealing treatment of Fe-Cr-Co-Si and Sm

(Co

Zr)

type permanent magnet alloys on their microscopic structures was studied. From the measured lifetime and S-parameter of PA

it is shown that the reduction of change of PA life-time in aging-treated samples is due to the imhomogeneity induced by precipitation in these alloys.

关键词

Keywords

references

G. Y. Chin et al ., J. Appl. Phys. , 49 , 2046 （ 1978 ）.

T. Ojima et al ., IEEE Trans. Magnetices , MAG-13 , 1317 （ 1977 ）.

H. Lutgemier et al ., Physica, B 86~88 , 1363 （ 1977 ）.

G. Albanese et al ., IEEE Trans. Magnetics , MAG-6 , 161 （ 1970 ）.

李国栋等，物理学报， 30 ， 2 , 254 （ 1981 ）.

张天保和刘年庆，核探测器与核电子学会议录汇编，原子能出版社 1979 ,p. 328 .

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