The origin of thermal stability and crystallization process of Zr 50Ct 40Al 10 metallic glass have been investigated by means of differential scanning calorimetry (DSC), x-ray diffraction (XRD) and resonant ultrasound spectroscopy (RUS) techniques, by comparing to Zr 70Cu 20Al 10 and Zr 70Cu 30Al 30 glassy alloys. The thermal stability of Zr 70Cu 20Al 10 is significantly higher than those of the others. The x-ray diffraction analysis indicates that constituent atoms in Zr5oCu4oAlio are closely packed in a glassy state. It was found from DSC that Zr 70Cu 20Al 10 glass shows a complicated crystallization process when it is heated at usual heating rates, but when it is rapidly heated, the ordered B2-type ZrCu (equilibrium phase higher than 984K) is formed as a primary phase. This behavior is discussed in terms of the long-range-diffusion of atoms.
|Number of pages||4|
|Journal||Zairyo/Journal of the Society of Materials Science, Japan|
|Publication status||Published - 2009 Mar|
- Bulk metallic glasses
- X-ray diffraction