TRansformations de Phases Sous Broyage

Translated title of the contribution: Phase transformations under ball-milling

P. Pochet, L. Chaffron, P. Bellon, G. Martin

Research output: Contribution to journalArticle

Abstract

It is possible to predict which phase stabilises as a function of the milling conditions? Two systematic experimental studies of phase transformations under ball milling crystal to amorphous transition in NixZry and order-disorder in FeAl have demonstrated that the end product of a milling treatment and the associated path depends on the milling temperature and intensity to be defined in the text. A simple model for the competition between shear induced disorder and thermally activated atom jumps yields a dynamical equilibrium phase diagram for FeAl under milling in good agreement with experimental findings. Atomistic Monte Carlo simulations of an ordered compound under sustained shearing reproduces most behaviors observed in FeAl ; moreover the achieved microstructure is found to depend on the amplitude and - geometry of the disorder introduced by each shearing event, as well as on the number of vacancies produced by non conservative dislocation motions. Advantage is taken from the above results for practical purposes. An example is given of optimizing the milling treatment for synthesizing nanocomposite materials for electrical applications.

Translated title of the contributionPhase transformations under ball-milling
Original languageFrench
Pages (from-to)351-361
Number of pages11
JournalAnnales de Chimie: Science des Materiaux
Volume22
Issue number6
StatePublished - Dec 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry

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  • Cite this

    Pochet, P., Chaffron, L., Bellon, P., & Martin, G. (1997). TRansformations de Phases Sous Broyage. Annales de Chimie: Science des Materiaux, 22(6), 351-361.