Phase transformations in a Cu–Zr–Al metallic glass. (1st July 2020)

• Record Type: Journal Article
• Authors: Cheng, Qi; Han, Xiaoliang; Kaban, Ivan; Soldatov, Ivan; Wang, Wei Hua; Sun, Yong Hao; Orava, Jiri
• Is Part Of: Scripta materialia. Number 183(2020)
• Page Start: 61
• Page End: 65
• Publication Date: 2020-07-01
• Subjects: Fast scanning calorimetry -- Crystallization -- Phase transformations -- Metallic glass; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.03.028
• Languages: English
• ISSNs: 1359-6462

Abstract

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 ~10 2 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. Graphical abstract: Image, graphical abstract