Towards Ultrastrong Glasses
Towards Ultrastrong Glasses
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DOI：
10.1002/adma.201102795
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发表时间：
2011-10-18
影响因子：
29.4
通讯作者：
Rouxel, Tanguy
中科院分区：
文献类型：
--
作者：
Wondraczek, Lothar;Mauro, John C.;Rouxel, Tanguy
新型玻璃材料的开发是解决能源、医药和先进通信系统等重大全球挑战的关键。例如，薄、柔性和大面积玻璃基板将在柔性显示器、太阳能电池的卷对卷加工、下一代触摸屏设备和有机半导体封装的发展中发挥推动作用。玻璃的主要缺点及其在这些应用中的局限性是其脆性断裂行为，特别是在存在表面缺陷的情况下，这可能会大大降低玻璃产品的实际强度。因此，设计新的超强玻璃材料和强化技术是至关重要的。关于玻璃强度的主要问题进行了讨论，重点是潜在的微观机制，负责机械性能。还讨论了弹性性能和断裂行为之间的关系，重点是氧化物和金属玻璃。从理论的角度考虑了玻璃材料力学性能的原子模型。还讨论了这些性质的拓扑起源，包括其与结构和化学非均质性的关系。最后，对提高玻璃制品抗损伤性的几种增韧策略进行了评述。
The development of new glassy materials is key for addressing major global challenges in energy, medicine, and advanced communications systems. For example, thin, flexible, and large-area glass substrates will play an enabling role in the development of flexible displays, roll-to-roll processing of solar cells, next-generation touch-screen devices, and encapsulation of organic semiconductors. The main drawback of glass and its limitation for these applications is its brittle fracture behavior, especially in the presence of surface flaws, which can significantly reduce the practical strength of a glass product. Hence, the design of new ultrastrong glassy materials and strengthening techniques is of crucial importance. The main issues regarding glass strength are discussed, with an emphasis on the underlying microscopic mechanisms that are responsible for mechanical properties. The relationship among elastic properties and fracture behavior is also addressed, focusing on both oxide and metallic glasses. From a theoretical perspective, atomistic modeling of mechanical properties of glassy materials is considered. The topological origin of these properties is also discussed, including its relation to structural and chemical heterogeneities. Finally, comments are given on several toughening strategies for increasing the damage resistance of glass products.