CRYSTAL TO NON EQUILIBRIUM PHASE TRANSITION INDUCED BY BALL-MILLING IN SILICON AND THE IMMISCIBLE Si (Sn, Zn) SYSTEMS

E. Gaffet , Mireille L. Harmelin-Vivien

Based on XRD patterns, SEM observations, EDX/SEM analyses and DSC experiments, we report on the crystal to metastable phase (i.e. amorphous phases, supersaturated crystalline solid solutions and/or non equilibrium compounds) transition induced by ball - milling in a pure element - a Si powder and in two immiscible binary alloys - Si/Sn and Si/Zn. The observations of such dynamic phase equilibria support the idea that a negative heat of mixing is not a necessary condition for the ball - milling amorphisation : the phase transition mechanism which is induced during ball - milling is different by solid state diffusion of multilayered films.

Domaines: Articles anciens

E. Gaffet, Mireille L. Harmelin-Vivien. CRYSTAL TO NON EQUILIBRIUM PHASE TRANSITION INDUCED BY BALL-MILLING IN SILICON AND THE IMMISCIBLE Si (Sn, Zn) SYSTEMS. Journal de Physique Colloques, 1990, 51 (C4), pp.C4-139-C4-150. ⟨10.1051/jphyscol:1990416⟩. ⟨jpa-00230776⟩