Skip to main content
Article
Crystal-crystal phase transformation via surface-induced virtual premelting
Physical Review B
  • Valery I. Levitas, Iowa State University
  • Zhaohui Ren, Zhejiang University
  • Yuewu Zeng, Zhejiang University
  • Gaorong Han, Zhejiang University
Document Type
Article
Publication Date
6-29-2012
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.

Comments

This article is from Physical Review B 85 (2012): 220104(R), doi:10.1103/PhysRevB.85.220104. Posted with permission.

Copyright Owner
American Physical Society
Language
en
Date Available
2013-11-25
File Format
application/pdf
Citation Information
Valery I. Levitas, Zhaohui Ren, Yuewu Zeng and Gaorong Han. "Crystal-crystal phase transformation via surface-induced virtual premelting" Physical Review B Vol. 85 Iss. 22 (2012) p. 220104(R)
Available at: http://works.bepress.com/valery_levitas/2/