|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermal and Mechanical Stability of Nanocrystalline Materials
||Grain Boundary Phase Transformations and their Impact on Thermodynamics and Kinetics
||J. Hickman, Yuri Mishin
|On-Site Speaker (Planned)
This talk will review the recent progress in the understanding and atomistic modeling of phase transformations in grain boundaries. Among other topics, we discuss the recent simulation study of a set of grain boundaries of the  tilt family in FCC metals. The study has revealed that multiple stable or metastable phases exist in all boundaries tested. The stable grain boundary structures follow a systematic behavior consistent with the structural units model. It was been demonstrated that the local atomic density in the grain boundary is an extra thermodynamic parameter that controls transformations among different grain boundary phases. This parameter should be included in thermodynamic descriptions of all grain boundaries. Another topic is the relationship between grain boundary structure and its thermal resistance. A systematic study of grain boundaries in Si has shown that structural changes can have a significant impact on the the thermal resistance and phonon scattering processes.
||Planned: Supplemental Proceedings volume