SPP 1594: Topological Engineering of Ultra-Strong Glasses

接受脆性和受益于其光学性能和通用的加工性，玻璃材料已发现其传统的应用环境中具有低水平的拉伸应力。然而，人们认识到，玻璃本质上是最坚固的人造材料，可以大规模生产。仅对于低的表面损伤抗性，目前不能利用独特的高水平的内在强度。在更广泛的背景下，涵盖所有类别的无序材料（以化学键的性质区分），脆性，刚度，弹性极限和实际缺乏延展性源于其分子，中程和表面拓扑结构。在无机和金属玻璃中，与任何其他固体材料相反，必须以双重方式考虑机械性能：基于结构长度尺度和动力学。确定拓扑和密度约束及其对韧性的工程设计是该领域未来的主要突破。至于尚未被忽视的协同作用产生于两类玻璃的联合处理：从拓扑力学的角度来看，两种材料似乎遵循相同的协调、堆积密度、自由体积、结构动力学、结构异质性和极端的中长期均匀性的构成原理。优先计划的目标是凝聚德国现有的实验和理论能力，以便在理解和设计玻璃机械性能方面实现概念突破。这是第一次，无机和金属玻璃将被认为是在一个联合的背景下。专题成功、国际显著和持久影响的关键是有效协调这一努力，为此计划了一些中心活动，包括组织国家和国际讲习班和会议，促进青年研究人员，平等机会行动，建立指导方案，确保高影响力的外联和联网。

Accepting brittleness and benefiting from their optical properties and universal processability, glassy materials have found their traditional applications in environments with low levels of tensile stress. It was recognised, however, that intrinsically glasses represent the strongest man-made material, which can be produced on large-scale. Only for low resistance to surface damage, the uniquely high levels of intrinsic strength can presently not be made use of. In a broader context, covering all classes of disordered materials (distinguished by the nature of chemical bonds), brittleness, stiffness, elastic limit and the practical absence of ductility originate from their molecular, mid-range and surface topology. In inorganic as well as metallic glasses and in contrast to any other solid material, mechanical properties must be considered in a twofold way: on the basis of structural length scales and dynamics. Identification of determinant topological and density constraints and their engineering towards ultrahigh toughness is now seen as the major future breakthrough of the field. As to yet disregarded synergy arises from the joint treatment of both classes of glass: from a topo-mechanical view, both materials appear to follow the same constitutive principles of coordination, packing density, free volume, structural dynamics, structural heterogeneity and extreme mid- to long-range homogeneity. The Priority Programme has the objective to condense existing experimental and theoretical competencies within Germany to enable a conceptual breakthrough in the understanding and design of the mechanical properties of glasses. For the first time, inorganic and metallic glasses will be considered in a joint context. Key to topical success, international visibly and long-lasting impact is the effective coordination of this effort for which a number of central activities are planned, including the organisation of national and international workshops and conferences, the promotion of young researchers, equal opportunity actions, setting-up a mentoring programme and ensuring high-impact outreach and networking.