Correlation between fragility and glass-forming ability/plasticity in metallic glass-forming alloys
Correlation between fragility and glass-forming ability/plasticity in metallic glass-forming alloys
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DOI：
10.1063/1.2759266
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发表时间：
2007-07
影响因子：
4
通讯作者：
E. Park;J. Na;D. Kim
中科院分区：
文献类型：
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作者：
E. Park;J. Na;D. Kim
在本研究中，作者关注了各种金属玻璃成形合金（MGAs）的脆性指数(m)、玻璃形成能力（GFA）和塑性之间的关系，并表明m值与这两个特性密切相关。特别地，m可以用ν（泊松比）表示：ν=−0.179+0.312logm，这意味着高m和大的ν值可以被视为MGAs延展性的指标。例如，可以合理地认为，Ca65Mg15Zn20的最低m值（5K / min时为21.5）既支持突出的GFA，又支持极端的脆性。
In the present study, the authors draw attention to the relationship among fragility index (m), glass-forming ability (GFA), and plasticity in various metallic glass-forming alloys (MGAs), and show that the m value is closely related to both characteristics. In particular, m can be formulated with ν (Poisson’s ratio): ν=−0.179+0.312logm, which means that high m as well as large ν values might be regarded as indicators of the MGAs ductility. As an example, it can be rationalized that the lowest m value (21.5 at 5K∕min) of Ca65Mg15Zn20 supports both outstanding GFA and extreme brittleness.