MAGNETOTHERMAL ANALYSIS OF THE AMORPHOUS TO NANOCRYSTAL TRANSFORMATION

Nanocrystalline phases can be formed during crystallization of amorpho us alloys annealed isothermally below the crystallization temperature. We present magnetic susceptibility data on this transformation. Magne tic measurements are able to detect the onset of the transformation of amorphous Ni-P alloys much earlier than differential scanning calorim etry. The transformation kinetics are analyzed by means of the Avrami plot based on the Johnson-Mehl-Avrami equation. The kinetics of furthe r solid state reactions in the nanostructured material can be investig ated similarly.