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Thermodynamic and Kinetic Characteristics of Glass Transition in an Amorphous Alloy Pd77.5Ni6.0Si16.5 |
| DING Xing-zhao1;LIU Xiang-huai1;WU Qin-chong2;HE Yi-zhen3 |
| 1Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050
2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
3Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
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| Cite this article: |
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DING Xing-zhao, LIU Xiang-huai, WU Qin-chong et al 1999 Chin. Phys. Lett. 16 358-360 |
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Abstract Variation of some thermodynamic functions of an amorphous alloy Pd77.5Ni6.0Si16.5 in glass transition temperature region during various scans was measured by a differential scanning calorimeter. The Gibbs free energy of glassy state was examined to be larger than that of the undercooled liquid state when the specimen was heated up to the glass transition temperature region, which supports the idea of what there are thermodynamic origins underlying glass transition process. On the other hand, it was found that glass transition behaved differently during heating and cooling scans. Moreover, with increase of heating rate, the glass transition process was delayed gradually to higher temperatures. It can be concluded that glass transition is a kinetically modified thermodynamic phase transformation.
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| Keywords:
61.43.Dq
07.20.Fw
64.70.Pf
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Published: 01 May 1999
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