稳恒磁场对Fe-Fe50 wt.%Si扩散偶中间相生长的影响

孙宗乾; 钟云波; 范丽君; 龙琼; 郑天祥; 任维丽; 雷作胜; 王秋良; 王晖; 戴银明

doi:10.7498/aps.62.136801

摘要

本文考察了Fe-Fe50 wt.%Si扩散偶在1200℃ 无磁场以及稳恒磁场下扩散层生长规律. 利用真空浇注强制冷却技术制备Fe-Fe50 wt.%Si扩散偶, 将制备的扩散偶进行1200℃不同磁感应强度下的热处理. 对获得热处理后试样进行SEM与EDS线扫描分析, 结果表明, 无论无磁场还是稳恒磁场下Fe-Fe50 wt.%Si扩散偶均生成两个扩散层, 即FeSi相层和Fe-Si固溶体层, 并且发现0.8 T下的两个扩散层宽度均小于0 T磁场下试样. 按照抛物线规律, 计算了扩散偶中间扩散层的互扩散系数, 发现0.8 T磁场下FeSi相层和Fe-Si固溶体层的互扩散系数较无磁场下分别降低了26.7%与34.1%. 通过对磁吉布斯自由能的计算, 发现0.8 T磁场对扩散激活能Q的影响不足以影响扩散过程. 但扩散过程中原子振动频率ν会受到磁场的影响, 进而影响扩散常数D0, 磁场对原子振动频率的影响可以用拉莫尔旋进理论进行解释.

关键词:

Abstract

In this paper, Fe-Fe50 wt.%Si diffusion couples are subjected to 1200℃ heat treatment in static magnetic field. Fe-Fe50 wt.% Si diffusion couples were prepared by vacuum casting technology and later sectioned and polished for scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) studies before heat treated. Microstructures of the treated samples which were polished first were analyzed by SEM and EDS; results show that the phase components of the interfacial intermetallic compound layers are FeSi phase layer and Fe-Si solid solution layer whether the samples were treated with or without magnetic field, and the layer widths in the samples treated with magnetic field are smaller than those without magnetic field. According to the parabolic law, the interdiffusion coefficients of the interfacial intermetallic compound layers were calculated and the interdiffusion coefficients of FeSi phase and Fe-Si solution under a field of 0.8 T are reduced by 26.7% and 34.1%. The Gibbs energy due to applied field was calculated, data analysis shows that the reduction of interfacial intermetallic compound layer coefficients is attributed to the decrease of frequency factor, not the activation energy. Decrease in layer thickness decrease is suggested to be related to the retardation of atomic diffusion resulting from the magnetic field, and a possible theory based on Larmor precession is given to explain this effect.

Keywords:

作者及机构信息

1.
上海大学上海市现代冶金与材料制备重点实验室, 上海 200072;

2.
中国科学院电工研究所应用超导重点实验室, 北京 100190

基金项目: 国家自然科学基金-钢铁联合基金重点项目(批准号: 51034010)资助的课题.

Authors and contacts

1.
Shanghai Key Laboratory of Modern Metallurgy & Material Processing, Shanghai University, Shanghai 200072, China;

2.
Key Laboratory of Applied Superconductivity, Chinese Academy of Sciences Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 51034010).

参考文献

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[3]	Watanabe T, Tsurekawa S, Zhao X, Zuo L 2006 Scripta Materialia 54 969
[4]	Liu X T, Cui J Z, Yu F X 2004 Journal of Materials Science 39 2935
[5]	Ren X, Chen G Q, Zhou W L, Wu C W, Zhang J S 2009 Journal of Alloys and Compounds 472 525
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施引文献

[1]	Liang L F, Wang X, Zhang S H 2001 Hot Working Technology 5 15 (in Chinese) [梁龙飞, 王绪, 章守华 2001 热加工工艺 5 15]
[2]	Tomoyuki K, Yoshihiro S, Toshio S, Ken'ichi S, Yuki M, Koichi K 1999 Materials Transactions 40 100
[3]	Watanabe T, Tsurekawa S, Zhao X, Zuo L 2006 Scripta Materialia 54 969
[4]	Liu X T, Cui J Z, Yu F X 2004 Journal of Materials Science 39 2935
[5]	Ren X, Chen G Q, Zhou W L, Wu C W, Zhang J S 2009 Journal of Alloys and Compounds 472 525
[6]	Hiromichi F, Sadahiro T 2011 Phys. Rev. B 83 0514412
[7]	Ren X, Zhou W L, Chen G Q, Huang Z H, Zhang J S 2007 Journal of Materials Engineering 8 41 (in Chinese) [任晓, 周文龙, 陈国清, 黄朝晖, 张俊善 2007 材料工程 8 41]
[8]	Li Z F, Dong J, Zeng S Q, Lu C, Ding W J, Ren Z M 2007 Journal of Alloys and C ompounds 440 132
[9]	Hideo N, Sadamichi M, Yoshihira A, Masahiro K 1985 Tansactions of the Japan Institute of Metals 26 1
[10]	Zhou S C, Pei W, Sha Y H, Zuo L 2007 Journal of Northeastern University(Natural Science) 28 1131 (in Chinese) [周世春, 裴伟, 沙玉辉, 左良 2007 东北大学学报(自然科学版) 28 1131]
[11]	Bacaltchuk C, Castello-Branco G, Ebrahimi M, Garmestani H, Rollett A 2003 Scripta Materialia 48 1343
[12]	An Z G, Hou H Y 2012 Southern Metals 187 11 (in Chinese) [安治国, 侯环宇 2012 南方金属 187 11]
[13]	Borg R, Lai D 1970 Journal of Appl. Phys. 41 5193
[14]	Baldwin N, Ivey D 1995 Journal of Phase Equilibria 16 300
[15]	Zhang Y, Ivey D 1998 Journal of Materials Science 33 3131
[16]	Gao M C, Bennett T, Rollett A, Laughlin D 2006 Journal of Physics D: Applied Physics 39 2890
[17]	Hu G X, Cai X, Rong Y H 2006 Fundamentals of Materials Science (Shanghai: Shanghai Jiao Tong University Press) p145 (in Chinese) [胡赓祥, 蔡珣, 戎咏华 2006 材料科学基础 (上海:上海交通大学出版社) 第145页]
[18]	Sigurds A, Miller D 1960 Journal of Appl. Phys. 31 986
[19]	Jaccarino V, Wertheim G, Wernick J, Walker L, Sigurds A 1967 Phys. Rev. 160 476
[20]	Chikazumi S 1984 Physics of Ferromagnetic Materials (vol.2) (Beijing: Metallurgical Industry Press) p4 (in Chinese) [近角聪信著 (杨膺善韩俊德译) 1984 磁性体手册 (中卷) (北京: 冶金工业出版社) 第4页]
[21]	Stephan K, Michael Z, Oliver O, Klaus D 2004 Solid State Ionics 172 407
[22]	Mehrer H, Eggersmann M, Gude A, Salamon M, Sepiol B 1997 Materials Science and Engineering A 239 889
[23]	Gou J, Zhao X F, Peng Y X 2010 Atomic and Nuclear Physics (Beijing: National Defense Industry Press) P86 (in Chinese) [郭江, 赵晓凤, 彭宜兴 2010 原子及原子核物理 (北京: 国防工业出版社) 第86页]

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