非晶合金原子移动性与电化学行为之间的关系

非晶合金相比传统金属拥有优异的物理、力学和化学性能，归因于组成均一、无多相组织，无晶界等特点，因此本研究主要从原子级微观结构的角度而不是化学成分分布和表面缺陷的角度来考察其界面行为，对其电化学行为和耐蚀性能作出机理上的分析。非晶合金的原子移动性主要是对应着非晶金属在微观结构上的能量起伏与不均性，可以较全面地反映非晶合金原子结构的能量状态和微观构型的变化，是影响物理、力学和化学性能的关键因素。对非晶合金进行驰豫、机械加工等处理均会改变其微观构型从而改变原子移动性。然而不同的微观结构状态对电化学行为的影响机制是如何的仍不清楚。本研究通过深入研究原子移动性和非晶合金电化学行为的关系，核心是研究原子移动性如何影响表面钝化膜的形成，维持及本征性能，进而影响其耐蚀性能，对搞清非晶合金界面行为与微观结构之间关系的这一基础性科学问题有重要的意义。将能促进非晶合金开发和应用研究。

Nowadays, the metallic glasses especially the bulk metallic glasses are more and more concerned about their application, they can be used in many industries. Comapared to conventional metall and alloy, metallic glasses have advantages in physical property, mechanical property and chemical property owing to its uniform composition, no multiphase and no crystalline boundary. As the same reason, it has unique feature in electrochmical behaviour.The view from micro-structure in atomic level but not the chemical composition and surface defect is very interesting and promising for the interface behaviour investigation of metallic glasses. The mechanical and physical properties of metallic glass are very sensitive to the microstructure. The structure relaxation and machanical treatment both can change the atomic mobility. In addition, atomic mobility of the amorphous materials is ascribed to the architecture. Thus the atomic mobility can evaluate the energy and architecture of atomic structure. However, the infulence atomic mobility and different micro-structure on electrochemical behaviour is unclear. Therefore, one fundamental issue is unveiled: How does the influence of the atomic mobility on the electrochemical behaviour in metallic glasses, and how it affects the corrosion resistance? This study will investigate the electrochemical behaviour, emphasize on the formation, stability and intrinsic properties of passive film of metallic glasses. The correlation between these properties and atomic mobility is one of the scientific foundamental issues: how does the micro structure influence on material interface behaviour. The achivement in this study will benefit the application research of metallic glass as well as its design, fabrication and treatment research.