退火处理Fe43Co43Hf7B6Cu1非晶合金的正电子湮没研究

晁月盛; 郭红; 高翔宇; 罗丽平; 朱涵娴

doi:10.7498/aps.60.017504

摘要

对熔体急冷法制备的Fe43Co43Hf7B6Cu1非晶合金进行了200,300,400和500 ℃保温30 min的退火处理,用正电子湮没寿命谱、X射线衍射、穆斯堡尔谱等方法研究了退火后试样的结构及结构缺陷变化.结果表明,在非晶合金的制备态,正电子主要在非晶基体相空位尺寸的自由体积中湮没,湮没寿命τ1为158.4 ps,强度I1

关键词:

Amorphous Fe43Co43Hf7B6Cu1 alloy prepared by melt-spun technique were annealed at temperature 200 ℃, 300 ℃, 400 ℃ and 500 ℃ for 30 min. The structure and structural defects in annealed specimens were investigated by positron annihilation lifetime spectra, X-ray diffraction (XRD) and Mssbauer spectroscopy (MS), etc. . The results show that in the as-quenched amorphous alloy, more than 85% of the positrons are localized at vacancy-sized free volumes in the amorphous based phase, annihilation lifetime τ1=158.4 ps, and the other 11.9% of positrons are trapped by microvoids, with lifetime τ2=397 ps. After annealing at temperature 200 ℃, 300 ℃ and 400 ℃ for 30 min, the atomic short range diffusion will give rise to the migration and annihilation of vacancy-like defects. The major component τ1 will be reduced continuously. The value of τ1 will decrease to 149 ps at 400 ℃, their relative intensities I1 decreases and reaches 80.8%. Meanwhile the annihilation lifetime of positrons in the microvoids τ2 will change from 353 ps to 364 ps, their relative intensities I2 are increased to 18.0%. When annealed at temperature 500 ℃ for 30 min, new trapping centers of positrons are produced owing to the crystallization of amorphous phase, I2 increases drastically to 26.7%.

Keywords:

作者及机构信息

1.
东北大学理学院,沈阳 110004

基金项目: 国家自然科学基金(批准号:50771025)资助的课题.

Authors and contacts

1.
College of Science, Northeastern University, Shenyang 110004, China

参考文献

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施引文献

[1]	Majumdar B, Bysak S, Akhtar D 2007 J. Magn. Mag. Mat. 309 300
[2]	Kulik T, Ferenc J, Kolano-Burian A, Liang X B, Xu B S 2007 J.Alloy Comp.434-435 623
[3]	Liang X B, Kulik T, Ferenc J, Erenc-Sedziak T, Xu B S, Grabias A, Kopcewicz M 2007 Mat. Charact. 58 143
[4]	Yu W Z 2003 Positron physics and its applications (Beijing: Science Press) p248—269 (in Chinese) [郁伟中 2003 正电子物理及其应用(北京:科学出版社)第248—269页] 〖5] Sato K, Shanai D, Hotani Y, Ougizawa, Ito K, Hirato K, Kobayashi Y 2006 Phys Rev. Lett. 96 228302
[5]	Sato K, Baier F, Sprengel W, Würschum R, Schaefer H E 2004 Phys Rev. Lett. 92 127403
[6]	Lu W, Yang L, Yan B, Huang W H 2005 Mater. Sci. Eng. B 128 179
[7]	Kri Asˇ tiaková K, vec P, Kri Asˇ tiak J, Duhaj P, au Asˇ a O 1997 Mater. Sci. Eng. A 226-228 321
[8]	Bernal M J, Cruz R M, Leguey T, Pareja R, Riveiro J H 1995 J. Non-cryst. Solids 180 164
[9]	Würschum R, Greiner W, Schaefer H E 1993 Nano. Mat. 2 55
[10]	Tong H Y, Ding B Z, Jiang H G, Wang J T, Lu K 1992 J. Appl. Phys. 72 5124
[11]	Guo Y C, Wang Z X 1984 The Physics of Noncrystal State (Beijing: Science Press) p175 (in Chinese) [郭贻诚、王震西 1984非晶态物理学(北京:科学出版社)第175页]
[12]	Liu X D 1998 Mater. Trans. JIM 39 783
[13]	Sato K, Murakami H, Kobayashi Y, Sprengel W, Schaefer H E 2007 J. Non-Cryst. Solids 353 1882
[14]	Sitek J, Degmová J, Sedla Acˇ ková K, Butvin P 2006 J. Magn. Mag. Mat. 304 e697
[15]	Chao Y S, Zhu H X, Li Z M, Zhang Y H, Zou Z H 2009 J. Physics 188 012038
[16]	Liang X B, Kulik T, Ferenc J, Kowalczyk M, Vlasak G, Sun W S, Xu B S 2005 Physica B 370 151
[17]	Chao Y S, Li M Y, Geng Y, Liu J G 2004 Acta Phys. Sin. 53 3453 (in Chinese) [晁月盛、李明扬、耿岩、刘吉刚 2004 53 3453]
[18]	Chao Y S, Zhang Y H, Guo H, Zhang L, Wang X G 2007 Acta Metal. Sin. 43 231 (in Chinese) [晁月盛、张艳辉、郭红、张莉、王兴刚 2007 金属学报 43 231]
[19]	Blazquez J S, Franco V, Conde C F, Conde A, Ferenc J, Kulik T 2007 J. Non-cryst. Solids 353 872
[20]	Han M G, Ou Y, Liang D F, Deng L J 2009 Chin. Phys. B 18 1261

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