Solid state reaction induced by post-milling annealing in the FeSi system
1993; Elsevier BV; Volume: 198; Issue: 1-2 Linguagem: Inglês
10.1016/0925-8388(93)90158-j
ISSN1873-4669
AutoresNadine Malhouroux‐Gaffet, É. Gaffet,
Tópico(s)Microstructure and mechanical properties
ResumoWe report on the far from equilibrium phase transitions induced by mechanical alloying and post-milling isothermal annealing in the FeSi system. Based on X-ray diffraction patterns, the influence of the mechanical alloying conditions (i.e. energy and frequency of the shocks) on the structures of the end-products were investigated. Specific attention was paid to a particular phase exhibiting some very interesting physical properties: the β-FeSi2 crystalline phase (a semiconductor-type phase exhibiting a direct optical gap and thermoelectric power). A direct relation was found between the Fe grain size and the Fe residual strain of the as-milled Fe+Si mixture and the end product obtained by isothermal annealing.
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