TY - JOUR

T1 - In-situ transmission electron microscopy analysis of the degree of heterogeneities in a metallic glass

AU - Zhang, N. Z.

AU - Sun, Kang

AU - Şopu, Daniel

AU - Spieckermann, Florian

AU - Ma, Xindi

AU - Geng, Chuan

AU - Bian, Xilei

AU - Jia, Yandong

AU - Wang, Qing

AU - Wang, Gang

AU - Eckert, Jürgen

N1 - Publisher Copyright: © 2022 Elsevier Ltd

PY - 2023/3

Y1 - 2023/3

N2 - The most common strategy to enhance the plasticity of metallic glasses (MGs) is to synthesize MG composites with crystalline phases. Here, the evolution of crystallization and the correlation between void-like defects and crystallization for the as-spun and cryogenically-treated (CT) MGs are investigated under a rigorous annealing process conducted in-situ. The as-spun specimen maintains its amorphous structure with a relatively large size of nanoscale defects. However, crystallization is observed for the CT MG with a high concentration of nanoscale defects that decreases during the crystallization process. The crystallization develops readily in the CT MG due to the greater size of the ordered clusters, the higher concentration of seeding sites, and its greater nucleation rate. Our findings demonstrated cryogenic treatment could tune atomic rearrangements, which has guiding significance on designing MG composite with controlled length scales and distribution of crystalline inclusions.

AB - The most common strategy to enhance the plasticity of metallic glasses (MGs) is to synthesize MG composites with crystalline phases. Here, the evolution of crystallization and the correlation between void-like defects and crystallization for the as-spun and cryogenically-treated (CT) MGs are investigated under a rigorous annealing process conducted in-situ. The as-spun specimen maintains its amorphous structure with a relatively large size of nanoscale defects. However, crystallization is observed for the CT MG with a high concentration of nanoscale defects that decreases during the crystallization process. The crystallization develops readily in the CT MG due to the greater size of the ordered clusters, the higher concentration of seeding sites, and its greater nucleation rate. Our findings demonstrated cryogenic treatment could tune atomic rearrangements, which has guiding significance on designing MG composite with controlled length scales and distribution of crystalline inclusions.

KW - Crystallization

KW - Defect

KW - Fourier transform filtering analysis

KW - In-situ TEM

KW - Metallic glass

UR - http://www.scopus.com/inward/record.url?scp=85144428274&partnerID=8YFLogxK

U2 - 10.1016/j.intermet.2022.107807

DO - 10.1016/j.intermet.2022.107807

M3 - Article

AN - SCOPUS:85144428274

VL - 154.2023

JO - Intermetallics

JF - Intermetallics

SN - 0966-9795

IS - March

M1 - 107807

ER -