Cooling rate dependence of structural order in Al90Sm10 metallic glass | Zendy

Yang Sun | Zendy; Yue Zhang | Zendy; Feng Zhang | Zendy; Zhuo Ye | Zendy; Zejun Ding | Zendy; CaiZhuang Wang | Zendy; Kai-Ming Ho | Zendy

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Cooling rate dependence of structural order in Al90Sm10 metallic glass

Author(s) -

Yang Sun,

Yue Zhang,

Feng Zhang,

Zhuo Ye,

Zejun Ding,

CaiZhuang Wang,

Kai-Ming Ho

Publication year - 2016

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4955223

Subject(s) - materials science , annealing (glass) , amorphous metal , formability , cluster (spacecraft) , short range order , composite material , condensed matter physics , physics , alloy , computer science , programming language

The atomic structure of Al90Sm10 metallic glass is studied using molecular dynamics simulations. By performing a long sub-Tg annealing, we developed a glass model closer to the experiments than the models prepared by continuous cooling. Using the cluster alignment method, we found that “3661” cluster is the dominating short-range order in the glass samples. The connection and arrangement of “3661” clusters, which define the medium-range order in the system, are enhanced significantly in the sub-Tg annealed sample as compared with the fast cooled glass samples. Unlike some strong binary glass formers such as Cu64.5Zr35.5, the clusters representing the short-range order do not form an interconnected interpenetrating network in Al90Sm10, which has only marginal glass formability.

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