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对熔体急冷法制备的非晶合金 Fe52Co34Hf7B6Cu1 进行了不同频率的中频磁脉冲处理, 用透射电子显微镜、穆斯堡尔谱、正电子湮没寿命谱等方法研究了处 理前后试样的微观结构及结构缺陷变化. 结果表明,经中频磁脉冲处理后,样品发生了部分纳米晶化, 晶化量随磁脉冲频率增加而增加, 当磁脉冲频率为2000 Hz时, 晶化量达33.1%; 在淬态非晶样品中, 正电子在类单空位中的湮没寿命τ1为150.5 ps, 强度 I1为77.7%, 在微孔洞中的湮没寿命τ2为349.7 ps,强度I2为22.3%; 随磁脉冲频率的增加, τ1, τ2值呈现减小的变化趋势, 与淬态非晶相比, I1有所增加, I2下降, τ1, τ2的平均值τ大幅降低.
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关键词:
- Fe52Co34Hf7B6Cu1非晶合金 /
- 中频磁脉冲 /
- 正电子湮没寿命 /
- 结构与结构缺陷
The effect of intermediate frequency magnetic pulse treatments on Fe52Co34Hf7B6Cu1 amorphous alloy prepared by melt-spun technique is investigated. The microstructure and structural defects of the treated specimens are investigated by TEM, Mössbauer spectroscopy and position annihilation lifetime spectra. The results show that the treated specimens by intermediate frequency magnetic pulse are partially crystallized, the content of the crystallization phase increases with the increase of the magnetic pulse frequency, and the crystalline volume fraction is 33.1% at a frequency of 2000 Hz. For the as-quenched amorphous alloy, the annihilation lifetime τ1 is 150.5 ps in the monovacancy-like free volume, and the relative intensity I1 is 77.7%. The annihilation lifetime τ2 is 349.7 ps in the microvoid, and the relative intensity I2 is 22.3%. With the increase of the magnetic pulse frequency, the values of τ1 and τ2 of the treated specimens decrease, I1 increases, I2 and τ decrease compared with the as-quenched amorphous alloy.-
Keywords:
- Fe52Co34Hf7B6Cu1 amorphous alloy /
- intermediate frequency magnetic pulse /
- positron annihilation lifetime /
- structure and structural defects
[1] Lucas M S, Bourne W C, Sheets A O, Brunke L, Alexander M D, Shank J M, Michel E, Semiatin S L, Horwath J, Turgut Z 2011 Mater. Sci. Eng. B 176 1079
[2] Turgut Z, Christy L, Huang M, Horwath J C 2010 J. Appl. Phys. 107 09A327
[3] Liang X B, Kulik T, Ferenc J, Erenc-Sedziak T, Xu B S, Grabias A, Kopcewicz M 2007 Mater. Character. 58 143
[4] Chao Y S, Guo H, Gao X Y, Luo L P, Zhu H X 2011 Acta Phys. Sin. 60 017504 (in Chinese) [晁月盛,郭红,高翔宇,罗丽平,朱涵娴 2011 60 017504]
[5] Kulik T, Ferenc J, Kowalczyk M 2005 J. Mater. Process. Tech. 162-163 215
[6] Liang X B, Kulik T, Feren J, Kowalczyk M, Vlasák G, Sun W S, Xu B S 2005 Physica B 370 151
[7] Liang X B, Ferenc J, Kulik T, Anna S W, Xu B S 2004 J. Magn. Magn. Mater. 284 86
[8] Zhong W D 1987 Ferromagnetism (Vol. 2) (Beijing: Science Press) (in Chinese) [钟文定 1987 铁磁学(中册)(北京:科学出版社)]
[9] Liu T, Zhao Z T, Ma R Z, Guo Y H, Chao H M, Wang Y Y 1995 Nucl. Sci. Tech. 18 28
[10] Yu W Z 1998 College Phys. 17 23
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[1] Lucas M S, Bourne W C, Sheets A O, Brunke L, Alexander M D, Shank J M, Michel E, Semiatin S L, Horwath J, Turgut Z 2011 Mater. Sci. Eng. B 176 1079
[2] Turgut Z, Christy L, Huang M, Horwath J C 2010 J. Appl. Phys. 107 09A327
[3] Liang X B, Kulik T, Ferenc J, Erenc-Sedziak T, Xu B S, Grabias A, Kopcewicz M 2007 Mater. Character. 58 143
[4] Chao Y S, Guo H, Gao X Y, Luo L P, Zhu H X 2011 Acta Phys. Sin. 60 017504 (in Chinese) [晁月盛,郭红,高翔宇,罗丽平,朱涵娴 2011 60 017504]
[5] Kulik T, Ferenc J, Kowalczyk M 2005 J. Mater. Process. Tech. 162-163 215
[6] Liang X B, Kulik T, Feren J, Kowalczyk M, Vlasák G, Sun W S, Xu B S 2005 Physica B 370 151
[7] Liang X B, Ferenc J, Kulik T, Anna S W, Xu B S 2004 J. Magn. Magn. Mater. 284 86
[8] Zhong W D 1987 Ferromagnetism (Vol. 2) (Beijing: Science Press) (in Chinese) [钟文定 1987 铁磁学(中册)(北京:科学出版社)]
[9] Liu T, Zhao Z T, Ma R Z, Guo Y H, Chao H M, Wang Y Y 1995 Nucl. Sci. Tech. 18 28
[10] Yu W Z 1998 College Phys. 17 23
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