中文摘要：

纳米晶体材料由于内部存在高的晶界分数,晶粒长大的驱动力较高,导致常温及高温下的热稳定性较差,给这类材料的加工和使用带来了障碍。本文从热力学与动力学两方面介绍了现阶段二元纳米晶合金热稳定性研究领域的主要进展,分别介绍了热力学稳定研究中的Trelewicz/Schuh（TS）模型、Wynblatt/Ku（WK）模型,Koch等人所用的方法,以及动力学稳定基本理论等主要模型,并对各模型进行了对比分析及客观总结。

英文摘要：

In nano-structured metals, due to grain size decreasing, grain boundary volume fraction increases markedly, which leads to a high driving force for grain growth. So nanocrystalline metals are always remaining at an unstable state upon heating, or even at room temperature, resulting in obstacles in the aspects of their fabrication and application. In this paper, the research progresses on thermal stability of binary nanocrystalline alloys at present stage are introduced from the view of thermodynamics and kinetics. Main theoretical models such as Trelewicz/Schuh（TS） model, Wynblatt/Ku（WK） model, and strategy adopted by Koch et al in thermodynamics stabilization, and basic theory in kinetics stabilization are reviewed and compared.