Phase equilibria under irradiation

P. Bellon, F. Soisson, Y. Grandjean, G. Martin

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A solid under irradiation is a far-from equilibrium system, and therefore phase equilibria in such a system cannot be assessed from equilibrium thermodynamics. Starting from a kinetic description which incorporates the various processes responsible for atomic diffusion (e.g. thermally activated jumps, replacement sequences or displacement cascades), the various possible steady-states can be identified analytically or numerically, as well as their kinetic evolution on varying the control parameters of the system (e.g. temperature, average composition, irradiation flux, cascade density ...). Furthermore, from stochastic versions of the kinetic model, potentials governing the stationary probability distribution of states can be derived, allowing to build dynamical equilibrium phase diagrams. Illustrating the above approach on the A2-B2 order-disorder transition, we have identified irradiation-induced two-phase state, cascade size and density effects on phase stability. By incorporating point defects, such description is well suited to study irradiation-induced segregation at sinks in concentrated alloys.

Original languageEnglish (US)
Title of host publicationThermodynamics and Kinetics
PublisherPubl by Materials Research Society
Number of pages10
ISBN (Print)1558992073
StatePublished - 1993
Externally publishedYes
EventProceedings of the Symposium on Phase Transformations in Thin Films - San Francisco, CA, USA
Duration: Apr 13 1993Apr 15 1993

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


OtherProceedings of the Symposium on Phase Transformations in Thin Films
CitySan Francisco, CA, USA

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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