期刊
MATERIALS TODAY
卷 52, 期 -, 页码 161-174出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2021.12.004
关键词
Ordered superlattice; Intermetallic materials; Chemically complex alloys; Sublattice occupancy; Grain-boundary engineering
资金
- CityU Grant [9610498, 11213319, 21205621]
- Hong Kong Institute for Advanced Study [9360157]
- CityU Shenzhen Research Institute (SRI) [2020A1515110647]
- National Natural Science Foundation of China (NSFC) [52101151]
- NSFC [52101135]
- Hong Kong Research Grant Council (RGC)
- [Grant9360157]
Intermetallic materials with diverse ordered superlattice structures exhibit unusual properties and have potential for advanced structural applications. This paper critically reviews the historical developments and recent advances in these materials, focusing on their unique microstructures, grain-boundary segregation, disordering, and remarkable mechanical and functional properties. The future research orientation, challenges, and opportunities in this new frontier are also discussed.
Intermetallic materials are bestowed by diverse ordered superlattice structures together with many unusual properties. In particular, the advent of chemically complex intermetallic alloys (CCIMAs) has received considerable attention in recent years and offers a new paradigm to develop novel metallic materials for advanced structural applications. These newly emerged CCIMAs exhibit synergistic modulations of structural and chemical features, such as self-assembled long-range close-packed ordering, complex sublattice occupancy, and interfacial disordered nanoscale layer, potentially allowing for superb physical and mechanical properties that are unmatched in conventional metallic materials. In this paper, we critically review the historical developments and recent advances in ordered intermetallic materials from the simple binary to chemically complex alloy systems. We are focused on the unique multicomponent superlattice microstructures, nanoscale grain-boundary segregation, and disordering, as well as the various extraordinary mechanical and functional properties of these newly developed CCIMAs. Finally, perspectives on the future research orientation, challenges, and opportunities of this new frontier are provided.
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