Heterogeneous nucleation in Zr-Cu-Al-Ag metallic glasses triggered by quenched-in metastable crystals - A time-resolved neutron diffraction study

被引：21

作者：

Wu, Zhenduo ^{[1
]}

Lan, Si ^{[1
,2
]}

Wei, Xiaoya ^{[1
]}

Olds, Daniel ^{[3
]}

Page, Katharine ^{[3
]}

Shen, Baolong ^{[4
]}

Wang, Xun-Li ^{[1
,5
]}

机构：

[1] City Univ Hong Kong, Dept Phys, 83 Tat Chee Ave, Hong Kong, Peoples R China

[2] Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, 200 Xiaolingwei Ave, Nanjing 210094, Jiangsu, Peoples R China

[3] Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA

[4] Southeast Univ, Coll Mat Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China

[5] City Univ Hong Kong, Ctr Neutron Scattering, Shenzhen Res Inst, 8 Yuexing 1st Rd,Shenzhen Hitech Ind Pk, Shenzhen 518057, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2018年 / 551卷

基金：

中国国家自然科学基金;

关键词：

Neutron scattering; Bulk metallic glass; Crystallization; Heterogeneous nucleation; CRYSTALLIZATION BEHAVIOR; THERMAL-STABILITY; OXYGEN; IMPURITY;

D O I：

10.1016/j.physb.2017.12.030

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Crystallization of Zr-Cu-Al-Ag bulk metallic glasses containing quenched-in crystals was studied by time-resolved in-situ neutron diffraction during isothermal annealing in the supercooled liquid region. The quenched-in crystals grew slowly at the beginning, indicating good thermal stability of the Zr-Cu-Al-Ag metallic glass alloys. The neutron diffraction results demonstrated that crystallization in Zr-Cu-Al-Ag metallic glasses was triggered by quenched-in crystals, rather than traditional heterogeneous nucleation mechanisms such as atomic-level impurities, container wall or surface oxides.

引用

页码：60 / 63

页数：4