1. Phase transformations in a Cu–Zr–Al metallic glass.
- Author
-
Cheng, Qi, Han, Xiaoliang, Kaban, Ivan, Soldatov, Ivan, Wang, Wei Hua, Sun, Yong Hao, and Orava, Jiri
- Subjects
- *
ISOTHERMAL transformation diagrams , *CRYSTALLIZATION kinetics , *CALORIMETRY , *CRYSTALLIZATION , *LOW temperatures , *METALLIC glasses - Abstract
A combination of conventional calorimetry, ultra-fast scanning calorimetry and resistive heating gives access to heating rates exceeding 6 orders of magnitude allowing to probe crystallization kinetics and mechanisms in a Cu-Zr-Al metallic glass. Continuous-heating-transformation and double-peak time-temperature-transformation diagrams are constructed and related to the formation of glass–crystal composites with enhanced ductility. The metastable B2-CuZr phase becomes dominantly formed at a heating rate of ~102 K s−1 and higher. A critical heating rate to bypass crystallization is ~10,000 K s−1. For isothermal annealing at >850 K, only one crystallization event is detected; for lower temperatures, a complex two-step transformation occurs. Image, graphical abstract [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF