Nanoglasses - A way to enhanced mechanical properties of amorphous materials

纳米玻璃 - 增强非晶材料机械性能的一种方法

• 批准号: 224504410
• 负责人: Professor Dr. Karsten Albe
• 金额: --
• 依托单位: Institut für Nanotechnologie (INT)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/224504410?language=en
• 关键词: Nanoglasses; way; enhanced; mechanical; properties

Plastic deformation of conventional metallic glasses, which are characterized by a homogeneous atomic structure and chemistry, leads to the formation of few shear bands with the consequence of inhomogeneous deformation and brittle fracture. The disturbance of the homogeneous structure due to interglass interfaces on the nanometer-scale, as possible in nanoglasses prepared by consolidation of amorphous nanoparticles, can lead to improved plasticity, higher strength and ductility, completely different from the conventional rapidly quenched amorphous alloys. The aim of the project is to identify the topological properties of interglass interfaces and to understand their influence on the mechanical properties of nanoglasses. Initially, metallic glass systems, such as FeSc- and PdSi-based alloys, are considered in order to establish the atomic structure of the interglass interfaces and their role for plastic deformation. All experimental work on the structure and mechanical properties will be complemented by computer simulations, initially on the CuZr system and at a later stage on the PdSi system. For the PdSi-system an appropriate potential will be developed. The concept of nanoglasses can be systematically extended to ionic materials and to synthesis methods which allow faster and less expensive production on a larger scale. Besides the measurements of the elastic and plastic deformation using a variety of techniques, the details of the structure of the nanoglasses will be determined by using XRD, EXAFS, SEM, TEM, etc.

传统金属玻璃的塑性变形，其特征是具有均匀的原子结构和化学，导致形成很少的剪切带，其结果是不均匀的变形和脆性裂缝的结果。由于纳米尺度的纳米尺度上，由于纳米类在纳米层上的可能性，通过固结无定形纳米颗粒制备的均匀结构的干扰可带来改善的可塑性，更高的强度和延展性，与常规快速淬火的无偶无晶格的抗性，完全不同。该项目的目的是识别饰面界面的拓扑特性，并了解它们对纳米类机械性能的影响。最初，为了建立Interglass界面的原子结构及其在塑性变形方面的作用，因此考虑了金属玻璃系统，例如基于FESC和PDSI的合金。所有有关结构和机械性能的实验工作都将由计算机模拟，最初在Cuzr系统和PDSI系统的后期进行补充。对于PDSI系统，将开发出适当的潜力。纳米类的概念可以系统地扩展到离子材料和合成方法，从而可以更快，更便宜的生产。除了使用多种技术测量弹性和塑性变形外，纳米类结构的细节还将通过使用XRD，EXAFS，SEM，TEM等确定。