中国物理B ›› 1999, Vol. 8 ›› Issue (6): 455-462.doi: 10.1088/1004-423X/8/6/010

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STUDIES OF NANOCRYSTALLINE PHASE AND RESIDUAL AMORPHOUS PHASE OF FeCuNbSiB ALLOY

林木良1, 林德明2, 王华生2, 吴奕初2   

  1. (1)Analysis and Testing Center, Zhongshan University, Guangzhou 510275, China; (2)Department of Physics, Zhongshan University, Guangzhou 510275, China
  • 收稿日期:1998-08-26 修回日期:1999-01-29 出版日期:1999-06-15 发布日期:1999-06-20
  • 基金资助:
    Project supported by the Science and Technology Foundation of Guangdong Province, China (Grant No. 96135030).

STUDIES OF NANOCRYSTALLINE PHASE AND RESIDUAL AMORPHOUS PHASE OF FeCuNbSiB ALLOY

Lin De-ming (林德明)a, Wang Hua-sheng (王华生)a, Wu Yi-chu (吴奕初)a, Lin Mu-liang (林木良)b   

  1. a Department of Physics, Zhongshan University, Guangzhou 510275, China; b Analysis and Testing Center, Zhongshan University, Guangzhou 510275, China
  • Received:1998-08-26 Revised:1999-01-29 Online:1999-06-15 Published:1999-06-20
  • Supported by:
    Project supported by the Science and Technology Foundation of Guangdong Province, China (Grant No. 96135030).

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摘要： The σ-T and dσ/dT-T curves of the FeCuNbSiB amorphous alloy, which are the relationship between "apparent weight loss" and tempera ture, are investigated by magnetic thermogravimetry analysis (MTGA) technique. It is found that the crystallization process of the samples can be divided into five stages. The studies of samples annealed in the temperature range of 480-610℃ for 1 h show that when the annealing temperature (Ta) is lower than 540℃, the quantity of nanocrystalline α-Fe(Si) phase increases evidently with Ta, and the Curie temperature (Tc) of residual amorphous phase also increases linearly with Ta, i.e., Tc=0.52Ta+91.7℃, with correlation coefficient γ=0.98. The variation of volume fraction of α-Fe(Si) nanocrystalline phase or residual amorphous phase with Ta is measured.

Abstract: The $\sigma$-T and d$\sigma$/dT-T curves of the FeCuNbSiB amorphous alloy, which are the relationship between "apparent weight loss" and tempera ture, are investigated by magnetic thermogravimetry analysis (MTGA) technique. It is found that the crystallization process of the samples can be divided into five stages. The studies of samples annealed in the temperature range of 480-610℃ for 1 h show that when the annealing temperature (Ta) is lower than 540℃, the quantity of nanocrystalline $\alpha$-Fe(Si) phase increases evidently with Ta, and the Curie temperature (Tc) of residual amorphous phase also increases linearly with Ta, i.e., Tc=0.52Ta+91.7℃, with correlation coefficient $\gamma$=0.98. The variation of volume fraction of $\alpha$-Fe(Si) nanocrystalline phase or residual amorphous phase with Ta is measured.

中图分类号: 

  • 75.75.+a
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Kj (Amorphous and quasicrystalline magnetic materials) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 81.40.Gh (Other heat and thermomechanical treatments) 75.50.Bb (Fe and its alloys)