Metallic glass roadmap

Metallic glasses that mainly make up of metallic elements are new family member of glassy materials. This new kind of glass combines the characters of liquids and solids, glasses and metals, making it fascinating to both scientists and industrialists. With the discovery of more and more systems, metallic glass is becoming one of the most active research field in metallic materials, and some concepts and technology derived from metallic glasses also facilitate the development of other materials from quasi-crystals to high entropy alloys. Metallic glasses have now been successfully used in aerospace, robotics, medicine and consumer electronics etc., and the real applications of metallic glasses are still growing. On the other hand, the diverse properties and the unique structural of the metallic glasses render them ideal models to study major open issues including structural model of disordered materials, glass transition, collective motion and energy landscape etc. However, the understanding the emerging properties and phenomena of metallic glasses still poses enormous challenges, which have stimulated a wealth of new experimental approaches, the synthesis of new systems with tailored properties, novel experimental techniques and theoretical and numerical methods. In this Roadmap, we try to provide a broad overview of recent and possible future activities in the metallic glass field, and present a roadmap to future development and applications of metallic glasses by gathering contributions with different backgrounds, illustrating the major challenges and discussing the latest technology and strategy to tackle these challenges with experts covering various developments and challenges in general concepts, synthesis and characterisation, and simulation and theoretical methods.