Abstract
The effect of simultaneously adding P and Cu on the crystallization behavior of hetero-amorphous FeSiB alloy was investigated. Thermal properties and microstructure evolution were studied by means of X-ray diffraction, transmission electron microscopy, differential scanning, and isothermal calorimetric methods. It is found that the addition of P and Cu to the FeSiB alloy changes its crystallization temperature as well as the apparent activation energy for crystallization. The crystallization process is mainly dominated by three-dimensional growth with various nucleation rates for the selected FeSiB(PCu) alloys. The phases formed during crystallization for the different alloys of Fe84Si4B12, Fe83:3Si4B12Cu0:7, and Fe83:3Si4B8P4Cu0:7 are similar. The refinement effect of adding P and Cu to the FeSiB alloys is observed. The mean size of � -Fe phases decreases from 200 nm to about 20 nm. [doi:10.2320/matertrans.M2009206]
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