Recent progress of Ag-based fillers for active metal brazing: A systematic review

This is the authors' abstract. We don't add key points for this paper.

Active metal brazing (AMB) is pivotal in the manufacturing of complex industrial structures owing to its operability and efficiency. Ag-based fillers, an important feedstock for AMB, have garnered significant scientific and industrial interest due to their exceptional wettability, superior plasticity, and versatile applicability. However, a systematic review focusing on Ag-based fillers for AMB is currently deficient. This review systematically summarizes recent advances in Ag-based fillers for AMB, shedding light on key challenges and innovative control strategies. A comprehensive classification of currently employed Ag-based fillers is presented, with particular emphasis on novel fillers developed in recent years. The relationship between interface structure and performance characteristics, and the formation mechanism of joints using Ag-based fillers is thoroughly elucidated. The inherent issues and control strategies for the Ag-based fillers are critically discussed, including the recent breakthroughs in the application of advanced materials. Finally, the future outlook of the Ag-based fillers for AMB is put forward based on the current research status. This review presents a state-of-the-art perspective in Ag-based filler design, interface regulation, and optimization of the joint performance, aiming to provide a reference for further investigation and application of AMB technology.