High temperature x ray diffraction determination of the body-centered-cubic-face-centered-cubic transformation temperature in (Fe70Ni30)88Zr7B4Cu1 nanocomposites

In situ high-temperature x ray diffraction and magnetization measurements were performed on a melt-spun (Fe70Ni30)(88)Zr7B4Cu1 amorphous alloy to follow its structural evolution. At 728 K, a bcc-FeNi phase was observed as the primary crystallization product followed by transformation to an fcc phase similar to 773 K. During cooling to room temperature, the fcc-to-bcc transformation was not observed, and the metastable fcc-NiFe phase was retained at room temperature. (C) 2012 American Institute of Physics. [doi:10.1063/1.3675990]