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| STRUCTURE AND GLASS FORMING ABILITY (GFA) OF AMORPHOUS ALLOYS |
| LU Ke Institute of Metal Research; Academia Sinica; Shenyang 110015 |
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Cite this article:
LU Ke Institute of Metal Research; Academia Sinica; Shenyang 110015. STRUCTURE AND GLASS FORMING ABILITY (GFA) OF AMORPHOUS ALLOYS. Acta Metall Sin, 1992, 28(1): 67-76.
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Abstract A new microstructure model is developed for amorphous alloys, so called Clus-ter model, in which the amorphous phase is thought of composing of randomly distributed or-dered clusters of different sizes. Thermodynamic calculation on this model deduces a parameter describing the glass forming ability of metallic alloys: a_c=(1-2.08/φm)T_g/ T_m, where T_g is glass transition temperature, T_m is the melting temperature, and φm is entralpy change of melt-ing. It is believed that easy glass forming alloy systems have larger values of a_c This new criter-ion of GFA not only provides the theoretical background for several GFA criteria in the litera-ture cited, but also can predict the GFA of many alloy systems more reasonably and accurately.
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Received: 18 January 1992
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