Abstract
Complex metallic alloys (CMAs) are important engineering materials with great scientific and technological significance. Accurate description and better understanding of the atomic structure and structure-related properties is essential for CMAs’ future design and practical application. Atomic-level structure of CMAs remains as a mystery to be uncovered due to their complicated atomic configuration. Since atomic clusters are advocated as basic building blocks of materials, various cluster-based models have been developed during the past decades, among which the “cluster-plus-glue-atom” model has been proven as an effective one to describe the atomic structural features of CMAs. Meanwhile, many intriguing rules correlating the atomic cluster structure with the composition and physicochemical property of CMAs have been revealed in light of the cluster-plus-glue-atom model. Besides, the cluster-plus-glue-atom model has exerted profound influence on the theoretical design of CMAs with desired properties. In this review article, the atomic cluster structural features of CMAs described by the cluster-plus-glue-atom model, and the cluster structure related composition rules, physicochemical properties, together with their correlations have been outlined.
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