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Zr基块体非晶合金的摩擦磨损行为.pdf
Trans. Nonferrous Met. Soc. China 22(2012) 577−584
Isochronal and isothermal crystallization in
Zr Cu Ni Al bulk metallic glass
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J. C. QIAO, J. M. PELLETIER
Université de Lyon, MATEIS, UMR CNRS5510, Bat. B. Pascal, INSA-Lyon,
F-69621 Villeurbanne cedex, France
Received 26 August 2011; accepted 10 December 2011
Abstract: Non-isothermal crystallization transformation kinetics and isothermal crystallization kinetics in super-cooled liquid region
(SLR) in Zr Cu Ni Al bulk metallic glasses were studied by differential scanning calorimetry (DSC) and X-ray diffraction (XRD).
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In isochronal mode, the average values of activation energy in Zr Cu Ni Al bulk metallic glass determined by different models
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(Kissinger method, Flynn-Wall-Ozawa method and Augis-Bennett method) are in good agreement with each other. In addition, the
isothermal transformation kinetics in Zr Cu Ni Al bulk metallic glasses was described by the Johnson-Mehl-Avrami (JMA)
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model. For Zr Cu Ni Al bulk metallic glass, the Avrami exponent n ranges from 2.2 to 2.9, indicating that crystallization
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mechanism in the bulk metallic glass was mainly diffusion-controlled; crystal growth is controlled by long range ordering diffusion
in three-dimensional growth during
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