论文标题
单原子PD金属眼镜的表面结晶
Surface Crystallization of Monoatomic Pd Metallic Glasses
论文作者
论文摘要
从无定形原子结构的结晶通常被视为追求较低能量状态的自发过程，但是对于合金系统，由于固有的结构和组成复杂性，通常很难阐明。在这里，通过电子束照射，我们在单子PD金属玻璃系统中发现了表面限制，因此依赖大小的结晶，这归因于表面与内部之间的结构差异。表面结晶的平衡厚度是可控制的，它提出了一种有希望的方法来制造新型纳米结构。据信这项研究提供了对从纳米级到大尺寸的固体无定形到晶体相变的一般理解。
Crystallization from an amorphous atomic structure is usually seen as a spontaneous process in pursuit of a lower energy state, but for alloy systems it is often hard to elucidate because of the intrinsic structural and compositional complexity. Here, by means of electron beam irradiation, we found surface-limited, and thus size-dependent crystallization in a system of monoatomic Pd metallic glass, which is ascribed to the structural differences between the surface and the interior. The equilibrium thickness of the surface crystallization is controllable, presenting a promising approach to fabricate novel nanostructures. The investigation is believed to provide a general understanding of solid amorphous-to-crystalline phase transition from the nanoscale to the bulk size.
