Abstract
Crystallization in sputter deposited, amorphous FeW and MoCo of μ-phase composition alloys has been studied using transmission electron microscopy (TEM), electrical resistivity and X-ray diffraction. The amorphous alloys exhibit high thermal stability and transform directly to the equilibrium μ-phase with no intermediate metastable phase formation. In FeW, a tungsten-iron solid solution also forms as the alloy composition is actually in a two-phase (μ + solid solution) region. In both alloys, the crystallites form on a very fine scale and the μ-phase is heavily faulted. The crystallization behaviour may be indicative of a marked similarity between the short range structure of the amorphous phase and the μ-phase structure. Changes in electrical resistivity during crystallization are in substantial agreement with the structural changes observed through TEM and X-ray analysis.
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