Phase-formation maps of CuZrAlCo metallic glass explored by in situ ultrafast techniques. (December 2022)

• Record Type: Journal Article
• Authors: Han, Xiaoliang; Kaban, Ivan; Orava, Jiri; Cheng, Qi; Sun, Yong Hao; Soldatov, Ivan; Zimmermann, Martin v.; Song, Kaikai; Nielsch, Kornelius
• Is Part Of: Acta materialia. Volume 241(2022)
• Publication Date: 2022-12
• Subjects: Metallic glass -- Flash-annealing -- Flash DSC -- Electromagnetic levitation -- Synchrotron X-ray diffraction -- Phase transformations -- Crystallization -- Solidification; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2022.118371
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: Crystallization of Cu47.5 Zr48 Al4 Co0.5 metallic glass upon isokinetic and isothermal annealing is studied by conventional and ultrafast differential scanning calorimetry, resistive flash-annealing, and in situ high-energy X-ray diffraction. The fast-heating experiments of Cu47.5 Zr48 Al4 Co0.5 metallic glass are complemented by in situ high-energy XRD studies of the undercooled liquid by using electromagnetic levitation. The combination of complementary techniques reveals a competition between the Cu10 Zr7, B2 CuZr and τ4 Cu2 ZrAl phases crystallization depending on heating rate and shows the specific role of Co alloying. A continuous-heating-transformation diagram for a heating rate exceeding six orders of magnitude, Φ = 0.0833 − 90 000 K s −1, and a time-temperature-transformation diagram are constructed. Graphical abstract: Image, graphical abstract