The structural stability in nano-sized crystals of metals

Q. Meng, Y. Rong, T. Hsu
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引用次数: 5

Abstract

The equation of phase equilibria in nano-sized crystal of metals has been established in terms of thermodynamic equilibrium. The thermodynamic parameters are calculated and the critical grain size for the stable high-temperature phase at room temperature is obtained. As an example, the critical grain size of β-Co at room temperature is determined at 35nm when the excess volume is 10%. The result agrees well with the experiment of Katakimi et al. The factors affecting the stability of β-Co are also discussed.
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金属纳米晶体的结构稳定性
从热力学平衡的角度建立了金属纳米晶体的相平衡方程。计算了热力学参数,得到了室温下高温稳定相的临界晶粒尺寸。以室温下β-Co在35nm处过量体积为10%时的临界晶粒尺寸为例。结果与Katakimi等人的实验结果吻合较好。讨论了影响β-Co稳定性的因素。
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