Abstract

The structure of amorphous Ni 70Mo 10P 20 alloy was studied by X-ray diffraction and transmission and high-resolution electron microscopy. Phase decomposition in the amorphous phase was found to occur during the annealing between the glass transition and crystallization temperatures. The size of non-uniform regions was about 100 nm. The scattering vector corresponding to intensity maximum changes from 4.88 to 4.78 nm −1 from place to place. Nanocrystal groups form during the crystallization in this temperature region. The size of these nanocrystals is about 10–30 nm and there is no amorphous layer between them. The crystallization mechanism changes when the annealing temperature is below the glass transition temperature.

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