Observation of η-Al41Sm5 reveals motif-aware structural evolution in Al-Sm alloys

Ye, Z.; Meng, F.; Zhang, F.; Sun, Y.; Yang, L.; Zhou, S. H.; Napolitano, R. E.; Mendelev, M. I.; Ott, R. T.; Kramer, M. J.; Wang, C. Z.; Ho, K. M.

doi:10.1038/s41598-019-43079-9

Title: Observation of η-Al₄₁Sm₅ reveals motif-aware structural evolution in Al-Sm alloys

Journal Article · 30 April 2019 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-019-43079-9 · OSTI ID:1542879

^[1]; Meng, F. ^[1]; Zhang, F. ^[1];

^[2]; Yang, L. ^[1]; Zhou, S. H. ^[1]; Napolitano, R. E. ^[3]; Mendelev, M. I. ^[1]; Ott, R. T. ^[1];

^[1]; Wang, C. Z. ^[1]; Ho, K. M. ^[4]

Ames Lab., Ames, IA (United States)
Ames Lab., Ames, IA (United States); Univ. of Science and Technology of China, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, Dept. of Physics
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Ames Lab., Ames, IA (United States); Univ. of Science and Technology of China, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, Dept. of Physics; Iowa State Univ., Ames, IA (United States). Dept. of Physics

Using an effective genetic algorithm, we uncover the structure of a metastable Al₄₁Sm₅ phase that supplements its family sharing similar short-range orders. The phase evolves upon heating an amorphous Al-9.7 at.% Sm ribbon, produced by melt-spinning. The dynamical phase selection is discussed with respect to the structural connections between the short-range packing motifs in the amorphous precursor and those observed in the selected phases. Furthermore, the phase elucidated here is one of several newly discovered large-unit-cell phases found to form during devitrification from the glass in this binary system, further illustrating the power and efficiency of our approach, the important role of structural hierarchy in phase selection, and the richness of the metastable phase landscape accessible from the glassy structure.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE

Grant/Contract Number:: AC02-07CH11358; AC02-06CH11357

OSTI ID:: 1542879

Alternate ID(s):: OSTI ID: 1514869; OSTI ID: 1515002

Report Number(s):: IS-J-9813; IS-J-9828

Journal Information:: Scientific Reports, Vol. 9, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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