Journal
ACTA MATERIALIA
Volume 226, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2022.117630
Keywords
Glass stability; Ultrafast calorimetry; Metallic glass; Kinetics; Nucleation and crystallization
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The structural stability of a gold-based bulk metallic glass was investigated using FDSC. A chemically homogeneous glass was produced and the structural variations during annealing were observed. The kinetics of these processes and the stability of the crystalline structures were discussed.
The structural stability of a gold-based bulk metallic glass (Au49Ag5.5Pd2.3Cu26.9Si16.3) was investigated by fast differential scanning calorimetry (FDSC). A chemically homogeneous glass (CHG) containing no quenched-in nuclei was produced using sufficiently fast cooling from the melt. To characterize the stability of this glass, the structural variations during annealing in the glassy state were investigated and a sequence of five different events observed. These are structural relaxation, an incubation period, nucleation, crystallization, and finally reorganization. The kinetics of these processes and the stability of the crystalline structures are discussed.(C) 2022 The Authors. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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