Cooling rate dependence of structural order in Al90Sm10 metallic glass
- Univ. of Science and Technology of China, Anhui (China); Ames Lab., Ames, IA (United States)
- Ames Lab., Ames, IA (United States)
- Univ. of Science and Technology of China, Anhui (China)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Univ. of Science and Technology of China, Anhui (China); Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
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.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 2012CB933702; 11274288; 11574289; 201406340015; AC02-07CH11358
- OSTI ID:
- 1349898
- Alternate ID(s):
- OSTI ID: 1260852
- Report Number(s):
- IS-J-9247; TRN: US1701794
- Journal Information:
- Journal of Applied Physics, Vol. 120, Issue 1; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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