Crystallization behaviour of Gd4Al3 metallic glass has been studied by X-ray diffraction and differential scanning calorimetry. It has been found that the crystallization of Gd4Al3 glass is a two-stage process with the first stage occurring at 710 K - 715 K and the second - at approximately 770 K. The product of the first stage in the crystallization of Gd4Al3 glass has been identified as a Gd4Al3 nanophase having a primitive tetragonal (t) lattice with parameters a = b = 15.4893(8) angstrom, c = 5.3020(5) angstrom. Nanophase t-Gd4Al3 has been found to decompose into well-known tetragonal Gd3Al2 and cubic GdAl, which are the products of the second stage in the crystallization of Gd4Al3 glass. The kinetics of the crystallization of Gd4Al3 glass and the morphology of t-Gd4Al3 nanophase have also been briefly discussed.
|Publication status||Published - 1 Jan 1999|