About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
H-27: Atomistic Simulations of Liquid/Metal Interfaces with Applications to Active Brazing |
Author(s) |
Ian Winter, Michael Chandross |
On-Site Speaker (Planned) |
Ian Winter |
Abstract Scope |
Active brazing is a high temperature method for joining metal/ceramic parts. A particular issue affecting active-braze joints is runout, that occurs when the braze alloy flows out of the joint rather than fully wetting the metal substrate. Runout is a wetting instability with deleterious effects on strength and hermeticity. The wetting is determined by the surface energy of the metal, the surface tension of the braze alloy, and the braze/substrate interfacial energy, phenomena that are temperature and composition dependent. We present the results of interfacial thermodynamics and atomistic simulations that enable an understanding of the mechanisms controlling wetting in active brazing. We focus on the effects of the composition of the braze alloy and the metal substrate on the wetting behavior, with a goal of informing the design of new, better performing braze alloys. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 (SAND2022-1056 A). |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, |