Indirect nucleation in phase transformations with symmetry reduction

H. Y. Wang, Yunzhi Wang, T. Tsakalakos, S. Semenovskaya, A. G. Khachaturyan

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Non-classical nucleation in a first-order phase transition with a symmetry reduction and multicomponent long-range order parameter is investigated. A particular case of cubic → tetragonal transformation is considered. Based on the stochastic field equation, a computational method of finding the atomic configuration of a critical nucleus without any a priori constraints on the nucleation path is proposed. Two-dimensional computer simulations are performed. It is demonstrated that a transformation need not go directly to the equilibrium state during nucleation. Under certain conditions the system prefers an ‘indirect’ nucleation developing along a path that has a lower nucleation barrier. The critical nucleus formed along this path has a transient nonequilibrium structure, which transforms into the equilibrium structure during the growth process. The relation between indirect nucleation and the structural mechanism of the interfacial energy optimization in the case of multicomponent long-range order parameter is discussed.

Original languageEnglish (US)
Pages (from-to)1407-1420
Number of pages14
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number6
StatePublished - Dec 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys


Dive into the research topics of 'Indirect nucleation in phase transformations with symmetry reduction'. Together they form a unique fingerprint.

Cite this