Stabilization of Zr-base metallic glass studied by isochronal and isothermal annealing experiments

✍ Scribed by Y. Hiki; M. Tanahashi; S. Takeuchi

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 395 KB
• Volume: 442
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.01.153

✦ Synopsis

The internal friction Q -1 and the oscillation frequency f of a Zr-Ti-Cu-Ni-Be metallic glass specimen were measured using an inverted torsion pendulum with the free decay method. A single-roller melt-spinning apparatus was used for preparing the specimens. Two kinds of experiments have been performed. In the isochronal annealing experiment, temperature dependences of Q -1 and f were measured from the room temperature up to the crystallization temperature T x . The glass was found to become stabilized state by a long-time annealing near and below the glass transition temperature T g . In the isothermal annealing experiment, time dependences of Q -1 and f were measured at various annealing temperatures T a , and the relaxation time τ for the annealing process was determined. The dependence of τ on T a showed that the stabilization near T g could be due to the viscoelastic relaxation occurring in the glassy material.