About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
|
Presentation Title |
H-16: Kinetics of Peritectic Melting |
Author(s) |
Mingwang Zhong, Longhai Lai, Alain Karma |
On-Site Speaker (Planned) |
Mingwang Zhong |
Abstract Scope |
Recent experiments and a phase-field modeling study presented in another talk in this symposium have demonstrated that melting of a peritectic alloy can produce bicontinuous structures of two interpenetrating phases analogous to those obtained by other dealloying methods. This talk will present the results of additional phase-field simulations that further explore the kinetics of this process in the Ti-Ag alloy system that, at the peritectic temperature, exhibits a Ag-rich liquid at equilibrium with a Ti-rich solid α phase and a Ti50Ag50 solid β phase. The melting kinetics of the β phase is studied as a function of temperature and material parameters. The results reveal that depending on the superheating above the peritectic temperature and the excess free-energies of the solid-solid and solid-liquid interfaces, melting can occur by two distinct mechanisms that include the known mechanism of liquid film migration and a novel mechanism of liquid channel growth. |
Proceedings Inclusion? |
Undecided |