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Title: Cooling rate dependence of structural order in Al90Sm10 metallic glass

Here, 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.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Univ. of Science and Technology of China, Anhui (China); Ames Lab., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Univ. of Science and Technology of China, Anhui (China)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  5. Univ. of Science and Technology of China, Anhui (China); Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9247
Journal ID: ISSN 0021-8979
Grant/Contract Number:
2012CB933702; 11274288; 11574289; 201406340015; AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 1; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1349898
Alternate Identifier(s):
OSTI ID: 1260852