The effect of Y addition on the crystallization behaviors of Zr-Cu-Ni-Al bulk metallic glasses

被引：24
|
作者：
Lu, Shuaidan [1 ,2 ]
Sun, Shuchen [1 ,2 ]
Li, Kuanhe [1 ]
Li, Haiyang [1 ]
Huang, Xiaoxiao [1 ]
Tu, Ganfeng [1 ]
机构：
[1] Northeastern Univ, Sch Met, Shenyang 110819, Liaoning, Peoples R China
[2] Wenhua Rd 3-11, Shenyang 110819, Liaoning, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 799卷
关键词：
Bulk metallic glasses; Crystallization mechanism; Rare earth; Nucleation; NONISOTHERMAL CRYSTALLIZATION; MECHANICAL-PROPERTIES; YTTRIUM ADDITION; KINETICS; MICROSTRUCTURE; TRANSITION; PLASTICITY; FRAGILITY; ROLES;
D O I：
10.1016/j.jallcom.2019.05.219
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Crystallization behaviors of Zr53.8Cu29.1Al9.8 (Zr53) and Zr53.8Cu29.1Ni7.3Al9.8Y1 (Zr52Y1) bulk metallic glasses (BMGs) were studied using differential scanning calorimetry (DSC), X-ray diffraction, high-resolution transmission electron microscopy (HRTEM) and high-angle annular dark field-scanning transmission electron microscopy (HADDF-STEM). The DSC curves had been analyzed using activation energy and kinetic models. The results revealed that the minor addition of yttrium leads to the increasing nucleation rate at the initial stage, the tardiness of crystal grain growth at the advanced stage and the transformation of main crystallized products from Cu10Zr2 to CuZr2. The formation of a poorly-ordered precipitates were observed using the HRTEM and HADDF-STEM, which might be the precursor of Cu10Zr2 phases and result in the tardiness of initial nucleation on Zr53. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：501 / 512
页数：12
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