磁记忆技术若干问题的讨论
Discussions on Magnetic Memory Technologies
摘 要
从铁磁性材料的基本特性出发,探讨了用磁致伸缩方程组描述磁记忆的方法,给出了磁记忆磁场的数学表示式,讨论了磁记忆现象的基本规律和特点,分析了应力和偏磁场对材料磁特性的不同作用,提出了产生磁记忆的三个基本条件,即材料的压磁性、磁滞性和交变应力的反复作用,并对地磁场的作用给出了明确的解释.同时,分析了磁记忆研究存在的问题及其应用时的局限性等.
多晶体
磁致伸缩
磁记忆
Magnetic materials
Polycrystal
Magnetostriction
Magnet memory
Abstract
Based on the fundamental characteristics of ferromagnetic material,this paper investigated the methodology of describing magnetic memory by magnetostriction equation group,and an expression of magnetic field of magnetic memory was given.The fundamental rule and characteristics of magnetic memory were discussed and different effects of stress and biased magnetic field on the magnetic properties of the material were analyzed.Three basic factors made contribution to the magnetic memory of the material,namely piezomagnetism,magnetic hysteresis and repeated actions of alternating stress.The effect of geomagnetic field on the properties of magnetic memory was investigated.This paper also analyzed the known problems of the state of the art study of magnetic memory and its limitations on practical applications.
中图分类号 TG115.28
所属栏目 争鸣园地
基金项目
收稿日期 2014/8/25
修改稿日期
网络出版日期
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备注黎连修(1949-),男,研究员,主要从事铁道行业超声和电磁无损检测技术及其应用方面的研究.
引用该论文: LI Lian-xiu. Discussions on Magnetic Memory Technologies[J]. Nondestructive Testing, 2015, 37(2): 63～66
黎连修. 磁记忆技术若干问题的讨论[J]. 无损检测, 2015, 37(2): 63～66
被引情况:
【1】任吉林,刘海朝,宋凯, "金属磁记忆检测技术的兴起与发展",无损检测 38, 7-15(2016)
【2】黎连修, "关于磁记忆检测机理的分析与讨论",无损检测 38, 1-6(2016)
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参考文献
【1】任吉林,林俊明.金属磁记忆检测技术[M].北京:中国电力出版社,2000:44-78.
【2】黄松岭,李路明,汪来富,等.用金属磁记忆方法检测应力分布无损检测[J].无损检测,2002,24(5):212-214.
【3】周俊华,雷银照.正磁致伸缩铁磁性材料磁记忆现象的理论探讨[J].郑州大学学报,2003,24(3):101-105.
【4】钟文定.铁磁学[M].北京:科学出版社,2000.
【5】黎连修.磁致伸缩和磁记忆问题研究[J].无损检测,2004,26(3):109-112.
【6】BERLINCOURT D A,CURRAN D R,JAFFE H.Piezoelectric and piezomagnetic materials and their function in transducer[J].Physical Acoustics,1964,1(1):170-269.
【2】黄松岭,李路明,汪来富,等.用金属磁记忆方法检测应力分布无损检测[J].无损检测,2002,24(5):212-214.
【3】周俊华,雷银照.正磁致伸缩铁磁性材料磁记忆现象的理论探讨[J].郑州大学学报,2003,24(3):101-105.
【4】钟文定.铁磁学[M].北京:科学出版社,2000.
【5】黎连修.磁致伸缩和磁记忆问题研究[J].无损检测,2004,26(3):109-112.
【6】BERLINCOURT D A,CURRAN D R,JAFFE H.Piezoelectric and piezomagnetic materials and their function in transducer[J].Physical Acoustics,1964,1(1):170-269.
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