Phase transformations in a Cu-Zr-Al metallic glass

被引：29
作者：
Cheng, Qi [1 ,2 ]
Han, Xiaoliang [3 ]
Kaban, Ivan [3 ]
Soldatov, Ivan [4 ]
Wang, Wei Hua [1 ,2 ,5 ]
Sun, Yong Hao [1 ,2 ,5 ]
Orava, Jiri [3 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] IFW Dresden, Inst Complex Mat, Helmholtzstr 20, D-01069 Dresden, Germany
[4] IFW Dresden, Inst Metall Mat, Helmholtzstr 20, D-01069 Dresden, Germany
[5] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 183卷
基金：
中国国家自然科学基金;
关键词：
Fast scanning calorimetry; Crystallization; Phase transformations; Metallic glass; FORMING ABILITY; CRYSTALLIZATION BEHAVIOR; THERMAL-STABILITY; NUCLEATION; KINETICS; NANOCALORIMETRY; TEMPERATURE; MECHANISMS; DESIGN; ALLOYS;
D O I：
10.1016/j.scriptamat.2020.03.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 timetemperature-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 similar to 10(2) K s(-1) and higher. A critical heating rate to bypass crystallization is similar to 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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：61 / 65
页数：5
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