Document Type
Article
Publication Date
6-29-2012
Journal or Book Title
Physical Review B
Volume
85
Issue
22
First Page
220104(R)
DOI
10.1103/PhysRevB.85.220104
Abstract
A mechanism for crystal-crystal phase transformations (PTs) via surface-induced virtual premelting is justified thermodynamically and confirmed experimentally for the PTs in PbTiO3 nanofibers. When the thickness of the surface melt (which appears much below the melting temperature, especially for nano-objects) exceeds the size of the critical product nucleus, nucleation and growth of the product crystal occur. For nanowires, premelting starts near the smallest size, and hydrodynamic flow driven by reduction in the external surface leads to a large change in shape and further promotion of crystal-crystal PT. During the product crystal-growth stage, virtual melting is observed experimentally within the crystal-crystal interface.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Levitas, Valery I.; Ren, Zhaohui; Zeng, Yuewu; and Han, Gaorong, "Crystal-crystal phase transformation via surface-induced virtual premelting" (2012). Aerospace Engineering Publications. 27.
https://lib.dr.iastate.edu/aere_pubs/27
Supporting Information
2012-LevitasVI-CrystalCrystalPhaseTransformation-pbtio3.wmv.wmv (2338 kB)
pbtio3.wmv
Included in
Aerospace Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons
Comments
This article is from Physical Review B 85 (2012): 220104(R), doi:10.1103/PhysRevB.85.220104. Posted with permission.