Compression Behaviour and Equation of State of Zr44.4Nb7Cu13.5Ni10.8Be24.3 Bulk Metallic Glass up to 39 GPa
Abstract
The compression of Zr44.4Nb7Cu13.5Ni10.8Be24.3 bulk metallic glass (BMG) is investigated at room temperature up to 39 GPa using {in situ} high-pressure energy dispersive x-ray diffraction with a synchrotron radiation source. The equation of state of the BMG is obtained by the calculation of the radial distribution function. Pressure-induced structural relaxation is exhibited. It is found that below about 6 GPa, the existence of excess free volume contributes to the rapid structural relaxation, which gives rise to rapid volumetric change, and the structural relaxation results in structural stiffness under higher pressure.
- Publication:
-
Chinese Physics Letters
- Pub Date:
- May 2004
- DOI:
- 10.1088/0256-307X/21/5/038
- Bibcode:
- 2004ChPhL..21..898L