1. Reversible atomic processes as basic mechanisms of the glass transition
- Author
-
Ye, Feng, Sprengel, Wolfgang, Wunderlich, Rainer K., Fecht, Hans-Jorg, and Schaefer, Hans-Eckhardt
- Subjects
Glass -- Chemical properties ,Metallic glasses -- Evaluation ,Science and technology - Abstract
Reversible formation and disappearance of vacant spaces (vacancy-type defects) in bulk [Zr.sub.57][Cu.sub.15.4][Ni.sub.12.6][Nb.sub.5] [Al.sub.10] glass are directly evidenced by high-resolution, time-differential dilatometry studies. The vacancy kinetics are strongly temperature-dependent, with an effective migration enthalpy of [H.sup.M.sub.V] = 3.34 eV. This may explain the strong temperature dependence of glass properties such as viscosity. The results presented here are of general importance for understanding amorphous condensed matter and biomaterials and for the technical development of amorphous steels. bulk metallic glass | dilatometry | positron annihilation
- Published
- 2007